EE-Objective Paper-I (2016)

Transcription

1 ESE-6 ESE-6 EE Objective Pape-I EE-Objective Pape-I (6). Pemeance is invesely elated t (A) esistance (B) Cnductance (C) eluctance (D) Capacitance. Cnside the fllwing statements egading an ideal ce mateial:. It has vey high pemeability.. It lses all its magnetism when thee is n cuent flw.. It des nt satuate easily. Which f the abve statements ae cect? (A) and nly (B) and nly (C) and nly (D), and. The capacitance f a cnducting sphee f adius with a ttal chage f q unifmly distibuted n its suface is (A) Pptinal t q (B) Independent f (C) Pptinal t q (D) Independent f q Sl: F a cnducting sphee f adius Capacitance C 4, which is independent f q 4. The chaacteistic impedance f a tansmissin line depends upn (A) Shape f the cnduct (B) Suface teatment f the cnduct (C) Cnductivity f the mateial (D) Gemetic cnfiguatin f the cnduct 5. In a seies C cicuit supplied by a suce f 5 at a esnant fequency f Hz, the magnitudes f the vltages acss the capacit and the induct ae fund t be 45. If the esistance f the cicuit is, then the selectivity f the cicuit is (A). (B). (C). (D). Sl: Selectivity = f f f f esnance fequency f and f ae db fequencies n eithe side f f esnancefequency Selectivity db bandwidth Selectivity is als equal t X Q C X C c At esnance, 5, 45 5(at esnance vltage appeas esistance) 45 Q The value f chaacteistic impedance in fee space is equal t (A) (C) (B) (D) C ICP Intensive Classm Pgam IES-ive Intenet Based Classes DP All India IES-Test Seies eades in IES Pepaatin 65+ Centes acss India All ights eseved by Gatefum Educatinal Sevices Pvt. td. N pat f this bklet may be epduced utilized in any fm withut the witten pemissin.

2 ESE-6 ESE-6 EE Objective Pape-I Sl: 7. The magnitude f magnetic field stength H is independent f (A) Cuent nly (B) Distance nly (C) Pemeability f the medium nly (D) Bth cuent and distance Sl: Pemeability f medium 8. Cnside the fllwing types f tansmissin lines:. Open-wie line. Twin-lead wie. Caxial cable The capacitance pe mete will be least in which f the abve tansmissin lines? (A) nly (B) nly (C) nly (D), and 9. Thee equal pint chages ae lcated at the vetices f an equilateal tiangle n the cicumfeence f a cicle f adius. The ttal electic field intensity at the cente f the cicle wuld be q (A) Ze (B) 4 Sl: q (C) q q q (D) q q q q Electic field due t any tw chages will cancel the electic field due t thid chage. Then net electic field will be ze.. The Pynting vect n the suface f a lng staight cnduct f adius a and cnductivity, which caies cuent I in the z-diectin, is (A) (C) I â b I a â (B) (D) I a I a. Cnside the fllwing applicatin in espect f a squae cne eflect:. adi astnmy. Pint-t-pint cmmunicatin. T badcast Which f the abve applicatins is/ae cect? (A) nly (B) and nly (C) and nly (D), and. The vaiatin f B with distance fm a vey ling staight cnduct caying a cuent I is cectly epesented by (A) (B) B B â â ICP Intensive Classm Pgam IES-ive Intenet Based Classes DP All India IES-Test Seies eades in IES Pepaatin 65+ Centes acss India All ights eseved by Gatefum Educatinal Sevices Pvt. td. N pat f this bklet may be epduced utilized in any fm withut the witten pemissin.

3 ESE-6 ESE-6 EE Objective Pape-I (C) (D) Sl: B α. The esistivity f had dawn cppe at C 6 is.9 cm. The esistivity f annealed cppe cmpaed t had dawn cppe is (A) esse (B) Slightly lage (C) Same (D) Much lage 4. The numbe f electns excited int the cnductin band fm valence band (with E fbidden enegy gap and k Bltzmann s cnstant) is pptinal t (A) (C) B B E exp kt E exp kt (B) (D) E exp kt E exp kt Sl: The intinsic caies ae the electn which will mve t cnductin band fm valence band. The intinsic caie cncentatin is given by, n N N e i C EG KT Thus the excited electn cncentatin is E G KT pptinal t e ;HeeB E G 5. Supecnductivity in a mateial can be destyed by. Inceasing the tempeatue abve a cetain limit. Applying a magnetic field abve a cetain limit.. Passing a cuent abve a cetain limit. 4. Deceasing the tempeatue t a pint belw the citical tempeatue. Which f the abve ae cect? (A) and nly (B) and nly (C), and nly (D),, and 4 6. The elative pemeability f a medium is equal t (with M = magnetizatin f the medium and H = magnetic field stength) M M (A) (B) H H M M (C) (D) H H 7. The electical esistivity f many metals and allys dps suddenly t ze when they ae cled t a lw tempeatue (i.e., nealy equal t liquid helium tempeatue). Such mateials (metals and allys) ae knwn as (A) Piezelectic mateials (B) Diamagnetic mateials (C) Supecnducts (D) High-enegy had magnetic mateials 8. The dielectic stength f ubbe is 4 /mm at fequency f 5 Hz. What is the thickness f insulatin equied n an electical cnduct at k t sustain the beakdwn? (A).8 mm (B) 8. mm (C) 8. cm (D).8 mm ICP Intensive Classm Pgam IES-ive Intenet Based Classes DP All India IES-Test Seies eades in IES Pepaatin 65+ Centes acss India All ights eseved by Gatefum Educatinal Sevices Pvt. td. N pat f this bklet may be epduced utilized in any fm withut the witten pemissin.

4 ESE-6 ESE-6 EE Objective Pape-I Sl: We knw the electic field is given by v E d v d.85mm E 4,.8mm 9. The cnductivity f insulating mateials (a vey small value) is called as (A) esidual cnductivity (B) Dielectic cnductivity (C) Inic cnductivity (C) bipla cnductivity. An intinsic semicnduct has equal numbe f electns and hles in it. This is due t (A) Dping (B) fee electns (C) Themal enegy (D) alence electns Sl: Intinsic caies ae geneated by themal enegy. When a vey small amunt f highe cnducting metal is added t a cnduct, its cnductivity will (A) Incease (B) Decease (C) emain the same (D) Incease f decease depending n the impuity.. An electically balanced atm has ptns in its nucleus and electns in its utemst shell. The mateial made f such atm is (A) a cnduct (B) an insulat (C) a semicnduct (D) a supecnduct Sl: Numbe f ptn in a nucleus always indicates the atmic numbe, S the element having atmic numbe. S Zinc is the element, which is a cnduct.. The tempeatue cefficient f esistance f a dped semicnduct is (A) Always psitive (B) Always negative (C) Ze (D) Psitive negative depending upn the level f dping 4. In the slice pcessing f an integated cicuit (A) Cmpnents ae fmed in the aeas whee silicn dixide emains (B) Cmpnents ae fmed in the aeas whee silicn dixide has been emved. (C) The diffusing elements diffuse thugh silicn dixide (D) Only n diffusin pcess is used Sl: Thick xide laye n the suface f substate is emved by a pcess called phtlithgaphy and cmpnent egins ae placed int thse windw egins. 5. Pemanent magnet lses the magnetic behaviu when heated because f. Atmic vibatin. Diple vibatin. ealignment f diples Which f the abve ae cect? (A) and nly (B) and nly (C), and (D) and nly 6. The magnetic field equied t educe the esidual magnetizatin t ze is called (A) etentivity (B) Cecivity (D) Hysteesis (D) Satuatin ICP Intensive Classm Pgam IES-ive Intenet Based Classes DP All India IES-Test Seies eades in IES Pepaatin 65+ Centes acss India All ights eseved by Gatefum Educatinal Sevices Pvt. td. N pat f this bklet may be epduced utilized in any fm withut the witten pemissin. 4

5 ESE-6 ESE-6 EE Objective Pape-I 7. A cetain fluxmete has the fllwing specificatins: Ai gap flux density.5 wb / m Numbe f tuns n mving cil = 4 Aea f mving cil = 75 mm If the flux linking tuns f a seach cil f mm aea cnnected t the fluxmete is evesed in a unifm field f.5 Wb / m, then the deflectin f the fluxmete will be (A) 87.4 (B) 76.5 (C) 65.6 (D) 54.7 Sl: Cnstant f flux mete = G = NBA G Flux linking with cil Change in flux linking with cil = 6 Wb 6 (As flux mete is evesed) 6 G N Change in flux, N G ad Cnside the fllwing statements:. Bth femagnetic and feimagnetic mateials have dmain stuctues; each dmain has andmly iented magnetic mments when n extenal field is applied.. Bth femagnetic and feimagnetic mateials make thse dmains that have favuable ientatin t the applied field gw in size.. The net magnetic mment in femagnetic mateial is highe than that in feimagnetic mateial. 4. The net magnetic mment in feimagnetic mateial is highe than that in femagnetic mateial. Which f the abve statements ae cect? (A) and 4 nly (B), and 4 nly (C) and 4 nly (D), and Sl: Feimagnetism The magnetism is a esult f the alignment f tiny egins in the mateial called magnetic dmains "magnetic mments" in the mateial. F feimagnetism, neighbing magnetic mments lie in ppsite diectins. Nmally, the ppsite deing cancels ut the veall magnetic field f an bject; hweve, in a feimagnet, small diffeences between neigbing dmains makes a magnetic field pssible. Femagnetism Femagnetism ccus in sme elements such as in, nickel and cbalt. In these elements, the magnetic mments align in the same diectin and paallel t each the t pduce stng pemanent magnets. ecently, ae eath elements such as nedymium have been fund t geatly intensify femagnetism, esulting in pweful, cmpact pemanent magnets. Sme magnetic dmains in a feimagnetic mateial pint in the same diectin and sme in the ppsite diectin. Hweve, in femagnetism they all pint in the same diectin. F a femagnet and a feimagnet f the same size, theefe, the femagnet will likely have a stnge magnetic field. 9. The Hall vltage, H, f a thin cppe plate f. mm caying a cuent f A with the flux density in the z-diectin, ICP Intensive Classm Pgam IES-ive Intenet Based Classes DP All India IES-Test Seies eades in IES Pepaatin 65+ Centes acss India All ights eseved by Gatefum Educatinal Sevices Pvt. td. N pat f this bklet may be epduced utilized in any fm withut the witten pemissin. 5

6 ESE-6 ESE-6 EE Objective Pape-I Bz Wb / m and the Hall cefficient, H 7.4 m / C, is (A) 48 (B) (C) 74 (D) 7 Sl: elatin between Hall vltage & Hall cefficient is given by, H W H BI Z W. m; 7.4 m / C H BZ Wb / m ;I A H H 4 5 H v. A Zene egulat has an input vltage vaying between and. The desied egulated vltage is, while the lad vaies between 4 and k. The Sl: maximum esistance in seies with the unegulated suce and Zene dide wuld be (A). (B) 6.6 (C) 6.6 (D) 9. i 4 tk Z i t?? maximum value T get maximum esistance, input vltage must be lw and utput esistance ( ) lw. Hence Z I t I K A nt given z I 4t K Z I.8A 4 I I.8A I I.8 i Z. A sht in any type f cicuit (seies, paallel cmbinatin) causes the ttal cicuit. esistance t decease. Pwe t decease. Cuent t incease 4. ltage t incease Which f the abve ae cect? (A) and (B) and 4 (C) and 4 (D) and. An ai-cled slenid f 5 tuns has a css-sectinal aea A 8cm and length l cm. The value f its inductance is (A).45 mh (C).75 mh (B).68 mh (D).94 mh Sl: Given N = 5; A = 8cm =8-4 m l =cm= - m =Inductance f ai ced slenid = NA.68mH. The cuent in a cil changes unifmly fm A t A in half a secnd. A vltmete cnnected acss the cil gives a eading f 6. The self-inductance f the cil is (A).5H (B) H (C) H (D) 4H Sl: di = change f cuent = -=9A dt = change f time =.5sec ICP Intensive Classm Pgam IES-ive Intenet Based Classes DP All India IES-Test Seies eades in IES Pepaatin 65+ Centes acss India All ights eseved by Gatefum Educatinal Sevices Pvt. td. N pat f this bklet may be epduced utilized in any fm withut the witten pemissin. 6

7 ESE-6 ESE-6 EE Objective Pape-I e =ltage acss induct = 6 di e = ; dt e 6 6 H di 9 8 dt.5 4. In a mutually cupled cicuit, the pimay cuent is educed fm 4 A t ze in s. A vltage f 4 is bseved acss the secnday. The mutual inductance between the cils is (A) H (B) H (C).H (D).H Sl: di 4 4A 6 dt sec e 4 di M?; e M dt e 4 M.H 6 di 4 / dt 5. N esists each f esistance when cnnected in seies ffe an equivalent esistance f 5 and when ecnnected in paallel the effective esistance is. The value f is (A).5 (C) 7.5 Sl: Given 5 ; s N N 5 s 5... N p N N N... p (B) 5 (D) Multiplying equatins and 5 N N 6. F a seies - cicuit it sint 45. If, the value f is (A) (B) (C) (D) Sl: Given it sint lag ;? X 45tan tan 45 tan tan 7. A single-phase full-wave ectifie is cnstucted using thyists. If the peak value f the sinusidal input vltage is and the delay angle is π/ adian, then the aveage value f utput vltage is (A). (B).48 m (C) Sl: m.54 m (D).7 m m ( Cs ) m ( Cs6 ) m m m ICP Intensive Classm Pgam IES-ive Intenet Based Classes DP All India IES-Test Seies eades in IES Pepaatin 65+ Centes acss India All ights eseved by Gatefum Educatinal Sevices Pvt. td. N pat f this bklet may be epduced utilized in any fm withut the witten pemissin. 7

8 ESE-6 ESE-6 EE Objective Pape-I 8. The ptential diffeence AB in the cicuit A (A).8 (B).8 (C).8 (D).8 Sl: At nde A B A A A 6; A. 5 At nde B, B B 5 8; 4 B. 4.8 AB A B 9. Tw bulbs f W/5 and 5 W/5 ae cnnected in seies acss a supply f 5. The pwe cnsumed by the cicuit is (A) W (B) 6 W (C) W (D) 5 W Sl: Given P w; P 5w P? P T 4 A AB PP 5 5 T P P 5 6W B At this fequency, the minimal ealizatin f the Thevenin s impedance will have (A) A esist, a capacit and an induct. (B) A esist and a capacit (C) A esist and an induct (D) A capacit and an induct Sl: Z =Thevenin s Impedance =.8- j.667ω Z jxc Minimal ealizatin will be with and C 4. Analg-t-digital cnvete with the minimum numbe f bits that will cnvet analg input signals in the ange f -5 t an accuacy f m is (A) 6 (B) 9 (C) (D) 5 fullscale eading Sl: Accuacy n 5 5 n 5 n 9 n n 4. Thee esists ae cnnected in paallel Sl: 4 acss an ideal 4 suce. What wuld be the equivalent esistance seen by the lad cnnected acss this cicuit? (A) (B) (C) (D) eq T find eq, ltage suce is sht cicuited. 4. Thevenin s equivalent f a cicuit, peating at 5 ad / s, has OC z.8 j.667 O eq eq ICP Intensive Classm Pgam IES-ive Intenet Based Classes DP All India IES-Test Seies eades in IES Pepaatin 65+ Centes acss India All ights eseved by Gatefum Educatinal Sevices Pvt. td. N pat f this bklet may be epduced utilized in any fm withut the witten pemissin. 8

9 ESE-6 ESE-6 EE Objective Pape-I 4. The cuent i(t) thugh a esist in Sl: seies with an inductance is given by i t 4sin t 45 4sin t 6 A The MS value f the cuent and the pwe dissipated in the cicuit ae espectively (A) 5 A and 5 W (B) A and 5 W (C) 5 A and 5 W (D) A and 5 W I I I... ms ms ms ms ms 4 4 Ims I 5 5A P I 5 5 W 44. Thevenin s equivalents f the netwk in Fig.(i) ae and. If a esistance f Sl: is cnnected acss teminals AB as shwn in fig. (ii), what ae Thevenin s equivalents? Fig.(i) Fig.(ii) (A) and. (B) 6 and. (C) and 5. (D) 6 and 5. A B Th 6 5 T fine Th, Sht cicuit vltage suce A B A B 6 Th A vltage suce, cnnected t a lad, has an e.m.f. f and an impedance f 5 j. The maximum pwe that can be tansfeed t the lad is (A).W (B).W (C).5W (D).W Sl: F maximum pwe tansfe Z Z * Th Pmax.5W An ideal tansfme is ated /. A suce f and intenal impedance f is cnnected t the pimay. The pwe tansfeed t a lad Z cnnected acss the secnday wuld be a maximum, when (A) 4 (B) (C) Z (D) Cnside the fllwing values f the cicuit shwn belw: 5 j Z A B is ICP Intensive Classm Pgam IES-ive Intenet Based Classes DP All India IES-Test Seies eades in IES Pepaatin 65+ Centes acss India All ights eseved by Gatefum Educatinal Sevices Pvt. td. N pat f this bklet may be epduced utilized in any fm withut the witten pemissin. 9

10 ESE-6 ESE-6 EE Objective Pape-I vt = 5 sin 6t 5 v q s C i limsis lim s s s C Key: (*) Sl:.. I = A. =.5 H Which f the abve values ae cect? (A) and nly (B) and nly (C) and nly (D), and 5 5 I I.X I. A 5 I. 6.5H n ptin is cect 48. The espnse f a seies -C cicuit is given q by IS C whee q is the initial s C chage n the capacit. What is the final value f the cuent? q (A) C (C) Infinity t C q e (B) (D) Ze Sl: Using the final value theem I C 49. What shuld be dne t find the initial values f the cicuit vaiables in a fist-de -C cicuit excited by nly initial cnditins? (A) T eplace the capacit by a sht cicuit. (B) T eplace the capacit by an pen cicuit. (C) T eplace the capacit by a vltage suce. (D) T eplace the capacit by a cuent suce. 5. In a paallel esistive cicuit, pening a banch esults in. Incease in ttal esistance. Decease in ttal pwe. N change in ttal vltage and banch vltage Which f the abve is/ae cect? (A) nly (B) nly (C) nly (D), and 5. The pecisin esists ae (A) Cabn cmpsitin esists (B) Wie-wund esists (C) esists with a negative tempeatue cefficient (D) esists with a psitive tempeatue cefficient. 5. In ndal analysis, the pefeed efeence nde is a nde that is cnnected t ICP Intensive Classm Pgam IES-ive Intenet Based Classes DP All India IES-Test Seies eades in IES Pepaatin 65+ Centes acss India All ights eseved by Gatefum Educatinal Sevices Pvt. td. N pat f this bklet may be epduced utilized in any fm withut the witten pemissin.

11 ESE-6 ESE-6 EE Objective Pape-I. Gund. Many pats f the netwk. The highest vltage suce Which f the abve is/ae cect? (A) nly (B) nly (C) nly (D), and 5. Tw netwks ae said t be dual when (A) Thei nde equatins f the same (B) The lp equatins f ne netwk ae analgus t the nde equatins f the the (C) Thei lp equatins ae the same (D) The vltage suces f ne netwk ae the cuent suces f the the 54. ecipcity theem is applicable t a netwk. Cntaining, and C elements. Which is initially nt a elaxed system. Having bth dependent and independent suces Which f the abve is/ae cect? (A) nly (B) and nly (C) and nly (D), and 55. Which f the fllwing is tue f the cmplete espnse f any netwk vltage cuent vaiables f a step excitatin t a fist-de cicuit? (A) It has the fm ke (B) It has the fm k (C) It may have eithe the fm (a) the fm f (a) plus (b) (D) It has the fm e at at 56. A piezelectic cystal has a cupling cefficient K f.. Hw much electical enegy must be applied t pduce utput enegy f 7.6 J? (A) 5.8 mj (C) 4.8 mj (B).9 mj (D).6 mj 57. If a cnstant cuent geneat f 5 A, shunted by its wn esistance f, delives maximum pwe P in watts t its lad f, then the vltage acss the cuent geneat and P ae (A) 5 and 6.5 (B).5 and.5 (C) 5 and.5 (D).5 and 6.5 Sl: T, get maximum pwe tansfe 5A s Then the cicuit will be 5A 5A.5A.5A By cuent divisin we can say that, the cuent flwing thugh each esist is.5amp and vltage acss cuent geneat is.5.5vlts ICP Intensive Classm Pgam IES-ive Intenet Based Classes DP All India IES-Test Seies eades in IES Pepaatin 65+ Centes acss India All ights eseved by Gatefum Educatinal Sevices Pvt. td. N pat f this bklet may be epduced utilized in any fm withut the witten pemissin.

12 ESE-6 ESE-6 EE Objective Pape-I max P I watts 58. Thee sta-cnnected lads f 6 each Sl: 6 and thee delta-cnnected lads f 96 each ae cnnected in paallel and fed fm a thee-phase balanced suce having line-tneutal vltage f. The line cuents dawn fm the supply will be (A) A each (B) A each (C) 8 A each (D) 6 A each Cnveting Delta cnnected lad t Sta cnfiguatin, we get Sta cnnected lad Fig : 6 6 Nw fig () becmes 6 Delta cnnected lad 9 6 Fig: 9 6 Fig: In the questin it is given that fig () & fig () ae cnnected in paallel. Nw when these lads ae cnnected in paallel, the equivalent lad is: 6 6 line cuent vltage 8A Impedance 59. A wattmete eads kw, when its cuent cil is cnnected in phase and the ptential cil is cnnected acss and neutal f a balanced 4 (YB sequence) supply. The line cuent is 54 A. If the ptential cil ecnnected acss B-Y phases with the cuent cil in phase, the new eading f the wattmete will be nealy 6 6 (A) kw (B) kw (C) 6kW (D) 9kW Sl: Case-I: When cuent cil is cnnected in - Phase and ptential cil is cnnected acss and neutal, Watt mete eading, P I cs N cs.8 54 cs 6 6 Case-II: When cuent cil is cnnected t - Phase and ptential cil between B and Y phase. I 9 BY B B Y 6 I Y ICP Intensive Classm Pgam IES-ive Intenet Based Classes DP All India IES-Test Seies eades in IES Pepaatin 65+ Centes acss India All ights eseved by Gatefum Educatinal Sevices Pvt. td. N pat f this bklet may be epduced utilized in any fm withut the witten pemissin.

13 ESE-6 ESE-6 EE Objective Pape-I Wattmete eading P I cs 9 BY BY.I.sin P.96 kw kw 6. The phase vltage f a thee-phase, stacnnected altenat is. By mistake, the cnnectin f phase gt evesed. The new line vltages will have a elatinship. YB (A) Y B B (B) Y YB Y (C) YB B (D) Y YB B Sl: Unde nmal cnditins, phases ae displaced by. But as Phase is evesed, phas diagam becmes We can infe that, Y B BY B B 6 6. Tw-wattmete methd f pwe measuement in thee-phase system is valid f (A) Balanced sta-cnnected lad nly (B) Unbalanced sta-cnnected lad nly (C) Balanced delta-cnnected lad nly (D) Balanced unbalanced sta- as well Y 6. Cnside the fllwing statements egading the effect f adding a ple in the pen-lp tansfe functin n the clsed-lp step espnse: 6 Y. It inceases the maximum vesht. It inceases the ise time.. It educes the bandwidth Which f the abve statements ae cect? (A), and nly (B) and nly (C) and nly (D) and nly 6. A CO sceen has divisins n the hizntal scale. If a vltage signal 5sin 4t 45 is examined with line base setting f 5 ms/div, the numbe f signals displayed n the sceen will be (A).5 cycles (B).5 cycles (C) 5 cycles (D) cycles Sl: t 5 sin 4t 45 n= divisins n hizntal scale T msec f=5 HZ T msec f ine base setting = 5 ms/div Ttal time span = base setting n. f divisins 5 5 msec 5 msec N.f Cycles.5cycle msec 64. A seies C cicuit is cnnected t a 5 suce f vaiable fequency. The cicuit cuent is fund t be a maximum f.5 A at a fequency f 4 Hz and the vltage acss t ICP Intensive Classm Pgam IES-ive Intenet Based Classes DP All India IES-Test Seies eades in IES Pepaatin 65+ Centes acss India All ights eseved by Gatefum Educatinal Sevices Pvt. td. N pat f this bklet may be epduced utilized in any fm withut the witten pemissin.

14 ESE-6 ESE-6 EE Objective Pape-I Sl: C is 5. Assuming ideal cmpnents, the values f and ae espectively. (A) 5 and mh (B).5 and.9 H (C) 5 and.9 H (D).5 and mh In a seies C cicuit cuent is maximum when the cicuit is peating unde esnance and is given by Q 5 supply Imax.5A 5 It is als given as C Q supply C C Q 6 supply Q H 65. The esnant fequency f the cicuit 5 ~ 5cs t, 4Hz.5A (A) ad/s (C) ad/s (B) ad/s (D) 4 ad/s jc Sl: z eq j j jc C C j C C F esnance imaginay cmpnent must be ze C C C C C C C C 5 C C. 66. Which ne f the fllwing cnditins will be cect, when thee identical bulbs fming a sta ae cnnected t a thee-phase balanced supply? (A) The bulb in phase will be the bightest (B) The bulb in Y phase will be the bightest (C) The bulb in B phase will be the bightest (D) All the bulb will be equally bight. C 67. F the tw-pt netwk shwn in the figue I I F. H, and C F, is ICP Intensive Classm Pgam IES-ive Intenet Based Classes DP All India IES-Test Seies eades in IES Pepaatin 65+ Centes acss India All ights eseved by Gatefum Educatinal Sevices Pvt. td. N pat f this bklet may be epduced utilized in any fm withut the witten pemissin. 4

15 ESE-6 ESE-6 EE Objective Pape-I 6I I and I 4I. Cnside the fllwing f the abve netwk:. The netwk is bth symmetical and ecipcal.. The netwk is ecipcal.. A D 4. y 5 Which f the abve is/ae cect? (A) nly (B) and 4 nly (C) nly (D) and nly Sl: Fm the given equatin we can wite the Z paamete matix as 6 Z 4 Since Z Z it is said t be asymmetical Z Z it is said t be ecipcal. S is nt cect we can eliminate ptin C & D. Nw t cnfim whethe A, B, we need t find Y 4 YZ Y S & 4 ae cect 68. If the ttal pwes cnsumed by thee identical phase lads cnnected in delta and sta cnfiguatins ae W and W espectively, then W is (A) W (B) W (C) W (D) W Sl: In delta cnnectin pwe cnsumed = W In Sta cnnectin pwe cnsumed = W W W 69. A A ammete has an intenal esistance f. F extending its ange t measue 5 A, the equied shunt esistance is (A) (B) 5 (C) Sl: I 5A, Im A, m I 5 m sh ;m 5 m Im sh (D) 5 7. A PMMC vltmete is specified t be accuate within % f full scale. The limiting e, when the instument is used t measue a vltage f, is (A) 8% (B) 4% (C) % (D) % Sl: Full scale deflectin = AS Accuacy = % f full scale Magnitude f limiting e, A A. 4 4 % limiting e 4% 7. Hw many ples des the fllwing functin have? Fs 5A sh s s s s A A (A) (B) (C) (D) ICP Intensive Classm Pgam IES-ive Intenet Based Classes DP All India IES-Test Seies eades in IES Pepaatin 65+ Centes acss India All ights eseved by Gatefum Educatinal Sevices Pvt. td. N pat f this bklet may be epduced utilized in any fm withut the witten pemissin. 5

16 ESE-6 ESE-6 EE Objective Pape-I 7. The degee t which an instument indicates the changes in measued vaiable withut dynamic e is (A) epeatability (B) Hysteesis (C) Pecisin (D) fidelity 7. ading by the measuing instuments intduces an e in the measued paamete. Which f the fllwing devices gives the mst accuate esults? (A) PMMC (B) Ht-wie (C) CO (D) Electdynamic Sl: CO has the highe input impedance than PMMC, ht wie and electdynamic instuments and hence es in the measued paametes due t lading effect will be lesse. 74. A mving-cil galvanmete can be used as a DC ammete by cnnecting (A) A high esistance in seies with the mete (B) A high esistance acss the mete (C) A lw esistance acss the mete (D) A lw esistance in seies with the mete 75. Cnside the fllwing types f damping:. Ai-fictin damping. Fluid-fictin damping. Eddy-cuent damping PMMC type instuments use which f the abve? (A) nly (B) nly (C) nly (D), and 76. In data acquisitin system, analg data acquisitin system is used (A) F naw fequency width, while digital data acquisitin system is used when wide fequency width is t mnited. (B) F wide fequency width, while digital data acquisitin system is used when naw fequency width is t mnited. (C) When quantity t be mnited vaies slwly, while its cuntepat is pefeed if the quantity t be mnited vaies vey fast. (D) When quantity t be mnited is timevaiant, while digital data acquisitin system is pefeed when quantity is time-invaiant. 77. Duing the measuement f esistance by Caey Fste bidge, n e is intduced due t. Cntact esistance. Cnnecting leads. Themelectic e.m.f. (A) and nly (B) and nly (C) and nly (D), and 78. Scheing bidge is a vey vesatile AC bidge and is used f capacit testing in tems f. Capacitance value (magnitude). ss angle measuement. Simple balance detect like PMMC instument 4. Pviding safety t peats by incpating Wagne eathing device Which f the abve ae cect? (A) and nly (B) and 4 nly (C), and 4 nly (D),, and Cnside the fllwing instuments:. MI instument ICP Intensive Classm Pgam IES-ive Intenet Based Classes DP All India IES-Test Seies eades in IES Pepaatin 65+ Centes acss India All ights eseved by Gatefum Educatinal Sevices Pvt. td. N pat f this bklet may be epduced utilized in any fm withut the witten pemissin. 6

17 ESE-6 ESE-6 EE Objective Pape-I. Electstatic instument. Electdynammete instument Which f the abve instuments is/ ae fee fm hysteesis and eddy-cuent lsses? (A) nly (B) nly (C) nly (D), and 8. Dummy stain gauges ae used f (A) Cmpensatin f tempeatue changes (B) Inceasing the sensitivity f bidge (C) Cmpensating f diffeent expansins (D) Calibatin f stain gauge. 8. A wattmete is measuing the pwe supplied t a cicuit whse pwe fact is.7. The fequency f the supply is 5 c/s. The wattmete has a ptential cil cicuit f esistance and inductance.5 H. The e in the mete eading is (A) 4% (B) 8% (C) % (D) 6% Sl: cs.7, f 5Hz Z j57 p.5h P P Ptentialcil X f %e tan tan B 57 tan % 8. A mving-cil instument gives full-scale deflectin f ma, when a ptential diffeence f m is applied acss its teminals. T measue cuents up t A, the same instument can be used (A) With shunt esistance f. (B) With seies esistance f. (C) With shunt esistance f. (D) With seies esistance f. Sl: A I m I m m m sh. 8. A 4, thee-phase, ated fequency balanced suce is supplying pwe t a balanced thee-phase lad caying a line cuent f 5 A at an angle f lagging. The eadings f the tw wattmetes W and W, used f measuing the pwe dawn by the cicuit, ae espectively. (A) W and W (B) 5 W and 5 W (C) W and 5 W (D) 5 W and W Sl: Ttal pwe, P Ics 4 5cs Ttal Pwe = watts Fm the given ptins (a) & (b) dentes watts, but fm the ptin b, bth W & W ae equal. S W & W ae nly same when thee is unity pwe fact. Hence ptin a is ight answe. 84. A cuent f 4 sint A is passed thugh a cente ze PMMC mete and a mving-in mete. The tw metes will ead espectively. (A) 4 A and 5 A (B) 4 A and 5 A (C) sh ma 4 A and 5 A (D) 4 A and 5 A ICP Intensive Classm Pgam IES-ive Intenet Based Classes DP All India IES-Test Seies eades in IES Pepaatin 65+ Centes acss India All ights eseved by Gatefum Educatinal Sevices Pvt. td. N pat f this bklet may be epduced utilized in any fm withut the witten pemissin. 7

18 ESE-6 ESE-6 EE Objective Pape-I Sl: PMMC Mete eads aveage value DC value PMMC eads - 4 A Mving In mete eads MS value ims 4 i A MS 85. A stuctual membe is cmpessed t pduce a stain f 5 m / m. The nickel wie stain gauge has a gauge fact f -.. The pe-stess esistance f the gauge is. The change in esistance due t cmpessive stain will (A) Incease the esistance by 7.6m (B) Decease the esistance by 7.6m (C) Incease the esistance by 49.6m (D) Decease the esistance by 49.6m / Sl: Guage fact stain stainguagefact m As stain guage is f negative value, the change in esistance due t cmpessive stain will decease the esistance by 7.6 m. 86. The values f ammete and vltmete esistances ae. and espectively as shwn in the figue belw. The pecentage e in the calculated value f (vltmete eading /ammete eading A) is nealy (A) -% (B) -5% (C) % (D) 5% Sl: Pecentage e % / A 5% In the given cicuit, vltmete measues tue value f vltage but the Ammete measues sum f cuents thugh esistance & vltmete m sh m m m 5 sh m 5 m What is the multiplying pwe f a shunt f esistance when used with a Sl: galvanmete f esistance? (A) 4 (B) 6 (C) (D) sh m sh m m m m 6 A. 88. The mesh-cuent methd. Wks with bth plana and nn-plana cicuits. Uses Kichff s vltage law A ICP Intensive Classm Pgam IES-ive Intenet Based Classes DP All India IES-Test Seies eades in IES Pepaatin 65+ Centes acss India All ights eseved by Gatefum Educatinal Sevices Pvt. td. N pat f this bklet may be epduced utilized in any fm withut the witten pemissin. 8

19 ESE-6 ESE-6 EE Objective Pape-I Which f the abve is/ae cect? (A) nly (B) nly (C) Bth and (D) Neithe n 89. An 8-bit successive appximatin A-t-D cnvete is diven by a MHz clck. Its cnvesin time is (A) 8 s (C) 8 s (B) 6 s (D) 4.5 s Sl: A n bit successive appximatin ADC takes n cycles f cnvesin. As it is 8-bit 8 clck cycles f cnvesin time 8 4 sec 6 9. In using instument tansfmes, cae shuld be taken nt t pen cicuit the (A) Pimay f a vltage tansfme when the secnday is cnnected t the ated lad. (B) Secnday f a vltage tansfme when the pimay is enegized with the ated vltage. (C) Pimay f a cuent tansfme when the secnday is cnnected t the ated lad. (D) Secnday f a cuent tansfme when the pimay is caying the ated cuent. 9. An invese z-tansfm xkt f Xz (A) (C) e at at z z e e akt (B) akt e (D) is e akt akt e Key: (*) e at Sl: Given X (z) = at z z e (Nne f the ptin satisfying) 9. A system has a tansfe functin Sl: Cs 4 s s.6s 4 f a unit-step espnse and % tleance band, the settling time will be (A) 5 secnds (B) 4 secnds (C) secnds (D) secnds t s s ln ln x% 4 wn wn wn Cs 4 w s S.6S 4 S w s w.6 wn.8 t 5sec nds. n n n 9. Cnside the fllwing statements with efeence t the espnse f a cntl system:. A lage esnant peak cespnds t a small vesht in tansient espnse.. A lage bandwidth cespnds t slw espnse.. The cut-ff ate indicates the ability f the system t distinguish the signal fm nise. 4. esnance fequency is indicative f the speed f tansient espnse. Which f the abve statements ae cect? (A) and nly (B) and nly (C) and 4 nly (D) and ICP Intensive Classm Pgam IES-ive Intenet Based Classes DP All India IES-Test Seies eades in IES Pepaatin 65+ Centes acss India All ights eseved by Gatefum Educatinal Sevices Pvt. td. N pat f this bklet may be epduced utilized in any fm withut the witten pemissin. 9

20 ESE-6 ESE-6 EE Objective Pape-I 94. The pen-lp tansfe f a unity feedback K system is. F a damping fact f s s 4.5, the value f the gain K must be set t (A) (B) (C) 4 (D) 6 C(S) K Sl: (S) S 4S K 4 n n 4 K 6 n 95. F a unity feedback cntl system, the fwad path tansfe functin is given by Gs 4 s s s s Sl: The steady-state e f the system f the 5t input is (A) (B) (C) Gcd ss 4 S(S ) S S A t (D) type ess Ka ims G(s) K S a t 4 Ka lim S. S S S S S 5 e 96. When gain K f the pen-lp tansfe functin f de geate than unity is vaied fm ze t infinity, the clsed-lp system (A) May becme unstable (B) Stability may impve (C) Stability may nt be affected (D) Will becme highly stable 97. The fequency f sustained scillatin f maginal stability, f a cntl system K GsHs and peating s s s 5 Sl: with negative feedback, is (A) 5 / s (B) 6 / s (C) 5 / s G(s)H(S) K (D) 6 / s SS S 5 G S H S S S S 5 K S 6S 5S K F maginally stable, we need find fequency f scillatin S 6S 5S K S 5 S 6 K K 6 S K 5 S K Nw we get that K = 5 S, 6S K 6S W 5 ad / sec K Cnside the fllwing statements:. Adding a ze t the G(s)H(s) tends t push t lcus t the left.. Adding a ple t the G(s)H(s) tends t push t lcus t the ight.. Cmplementay t lcus (C) efes t t lci with psitive K. 4. Adding a ze t the fwad path tansfe functin educes the maximum vesht f the system. Which f the abve statements ae cect? ICP Intensive Classm Pgam IES-ive Intenet Based Classes DP All India IES-Test Seies eades in IES Pepaatin 65+ Centes acss India All ights eseved by Gatefum Educatinal Sevices Pvt. td. N pat f this bklet may be epduced utilized in any fm withut the witten pemissin.

21 ESE-6 ESE-6 EE Objective Pape-I (A), and nly (B) and 4 nly (C), and 4 nly (D),, and An -C netwk has the tansfe functin s s 4 GC s. The netwk culd be s s 6 used as. lead cmpensat. lag cmpensat. lag-lead cmpensat Which f the abve is/ae cect? (A) nly (B) nly (C) nly (D), and Sl: G S S 4 c S S S 6 S 4 S 6 S S 8 ead lag G c (S) will wk as lead lag cmpensatin. The patial factin expansin f the functin Fz (A) (B) (C) (D) 4z z z 5z 8z 4 z z z z z is.5 z z z.5.5 z z z Sl: We can actually slve this questin by using ptin we will get the slutin as 4z z z 5z 8z 4 z z z. If an enegy mete makes 5 evlutins in secnds, when a lad f 5 W is cnnected, the mete cnstant is (A) 8 ev/kwh (B) ev/kwh (C) 47 ev/kwh (D) ev/kwh Sl: Enegy supplied in watt hu 5 h 6 5 W h.65 kwh 6 N.f evlutins Mete cnstant kwh 5 8 ev / kwh.65. In a clsed-lp cntl system (A) Cntl actin is independent f utput (B) Output is independent f input (C) Thee is n feedback (D) Cntl actin is dependent n utput. The chaacteistics plynmial f a system can be defined as (A) Denminat plynmial f given tansfe functin (B) Numeat plynmial f given tansfe functin (C) Numeat plynmial f a clsed-lp tansfe functin (D) Denminat plynmial f a clsed-lp tansfe functin Sl: Denminat plynmial f a clsed lp tansfe functin 4. F a citically damped system, the clsedlp ples ae ICP Intensive Classm Pgam IES-ive Intenet Based Classes DP All India IES-Test Seies eades in IES Pepaatin 65+ Centes acss India All ights eseved by Gatefum Educatinal Sevices Pvt. td. N pat f this bklet may be epduced utilized in any fm withut the witten pemissin.

22 ESE-6 ESE-6 EE Objective Pape-I (A) Puely imaginay (B) eal, equal and negative (C) Cmplex cnjugate with negative eal pat (D) eal, unequal and negative Sl: eal, equal, and negative 5. A secnd-de psitin cntl system has an pen-lp tansfe functin 57.K Gs. What value f K will esult s s in a steady-state e f, when the input shaft tates at.p.m.? (A).74 (B).47 (C) 5. (D).5 57.K GsHs S s 6 input pm 6 (t)input 6 t.u(t) v t.u(t) 6 s S 6 Steadystate e ess K 57.K K lim S 57.K s S S 6 K K 6. Gain magin is the fact by which the system gain can be inceased t dive it t (A) Stability (B) Oscillatin (C) The vege f instability (D) Citically damped state 7. Nichls chat is used t detemine (A) Tansient espnse (B) Clsed-lp fequency espnse (C) Open-lp fequency espnse (D) Setting time due t step input 8. F a type-i system, the intesectin f the initial slpe f the Bde plt with db axis give (A) Steady-state e (B) E cnstant (C) Phase magin (D) Css-ve fequency 9. The desiable featues f a sevmt ae (A) w t inetia and lw beaing fictin (B) High t inetia and high beaing fictin (C) w t inetia and high beaing fictin (D) High t inetia and lw beaing fictin Diectins: Each f the fllwing eleven () items cnsists f tw statements, ne labelled as Statement (I) and the the as Statement (II). Examine these tw statements caefully and select the answes t these items using the cde given belw: Cdes: (A) Bth Statement (I) and Statement (II) ae individually tue and Statement (II) is the cect explanatin f Statement (I). (B) Bth Statement (I) and Statement (II) ae individually tue but Statement (II) is nt the cect explanatin f Statement (I). ICP Intensive Classm Pgam IES-ive Intenet Based Classes DP All India IES-Test Seies eades in IES Pepaatin 65+ Centes acss India All ights eseved by Gatefum Educatinal Sevices Pvt. td. N pat f this bklet may be epduced utilized in any fm withut the witten pemissin.

23 ESE-6 ESE-6 EE Objective Pape-I (C) Statement (I) is tue but Statement (II) is false. (D) Statement (I) is false but Statement (II) is tue.. Statement (I): F type-ii highe systems, lead cmpensat may be used. Statement (II): ead cmpensat inceases the magin f stability.. Statement (I): Stability f a system deteiates when integal cntl is incpated int it. Statement (II): With integal cntl actin, the de f a system, me the system tends t becme unstable.. Statement (I): Self-lps can exist in blck diagam but nt in signal flw gaph. Statement (II): Bth blck diagams and signal flw gaphs ae applicable t linea time-invaiant systems.. Statement (I): The gauge fact f a stain gauge is the ati f stain t pe unit change in esistance. Statement (II): Pissn s effect is defined as pducing less stain with ppsite sign n the plane pependicula t the applied lad. Sl: Gauge fact = ati f elative change in electical esistance t the mechanical stain GF 4. Statement (I): ltage is the enegy pe unit chage ceated by chage sepaatin. Statement (II): Pwe is enegy pe unit f time. 5. Statement (I): The electical cnductivity f a slid slutin ally dps ff apidly with inceased ally cntent. Statement (II): A slid slutin has a less egula stuctue than a pue metal. 6. Statement (I): In type- and type- systems, stable peatin is pssible if gain is suitably educed. Statement (II): Any ne f the cmpensats lag, lead, lagend may be used t impve the pefmance. 7. Statement (I): Open-lp system is inaccuate and uneliable due t intenal distubances and lack f adequate calibatin. Statement (II): Clsed-lp system is inaccuate as it cannt accunt envinmental paametic changes and may becme unstable. ICP Intensive Classm Pgam IES-ive Intenet Based Classes DP All India IES-Test Seies eades in IES Pepaatin 65+ Centes acss India All ights eseved by Gatefum Educatinal Sevices Pvt. td. N pat f this bklet may be epduced utilized in any fm withut the witten pemissin.

24 ESE-6 ESE-6 EE Objective Pape-I 8. Statement (I): A cnstant tempeatue type ht-wie anemmete is suitable f tubulent flw measuements. Statement (II): When the esistance f the ht wie is kept cnstant by incpating cuent feedback, the bandwidth is inceased.. Statement (I): The null vltage f an DT cannt be educed t an insignificant value. Statement (II): Hall effect tansduces ae pimaily used t measue flux density. 9. Statement (I): Optical pymetes ae used as tansduces f the measuement f flame tempeatue in a bile. Statement (II): Nn-invasive methds ae suitable f flame tempeatue measuement in a bile. ICP Intensive Classm Pgam IES-ive Intenet Based Classes DP All India IES-Test Seies eades in IES Pepaatin 65+ Centes acss India All ights eseved by Gatefum Educatinal Sevices Pvt. td. N pat f this bklet may be epduced utilized in any fm withut the witten pemissin. 4