QUESTION BANK ENGINEERS ACADEMY W W W W (W W ) (W W ) Soil Mechanics Properties of Soils 1

Transcription

1 oil Mchanic roprti of oil QUETION BANK. Th liqui limit an platic limit of ampl ar 65% an 9% rpctily. Th prcntag of th oil fraction ith grain iz finr than. mm i 4. Th actiity ratio of th oil ampl i (a).5 (b). (c).5 ().. Th gin figur inicat th ight of iffrnt pycnomtr: Empty ycnomtr ycnomtr +Dry oil ycnomtr +oil + atr # -, Ram Nagar, Bambala uliya h.: , ycnomtr +atr 4 Th pcific graity of th oli i gin by (a) (b) (c) () 4 ( ) ( ) 4 4 ( ) ( ) 4. A oil ampl ha a hrinkag limit of % an pcific graity of oil oli a.7. Th poroity of th oil at hrinkag limit i (a).% (b) 7% (c) 7% () 78.8% 4. In a t oil ma, air occupi on-ixth of it olum an atr occupi on-thir of it olum. Th oi ratio of th oil i (a).5 (b).5 (c). ().5 5 Artion (A): If th atr tabl i ry nar to th ubgra of th roa. It ill ultimatly cau cracking of th roa urfac. Raon (R): Th conitncy of th oil ill chang from platic to liqui tat laing to it olumtric cra. (a) Both A an R ar tru an R i th corrct xplanation of A (b) Both A an R ar tru but R i not a corrct xplanation of A (c) A i tru but R i fal () A i fal but R i tru 6. Th tanar platicity chart to claify fin grain oil i hon in th gin figur. I% X 5 5 % Th ara mark X rprnt (a) ilt of lo platicity A-in (b) clay of high platicity (c) organic oil of mium platicity () clay of intrmiat platicity 7. A oil ampl i haing a pcific graity of.6 an a oi ratio of.78. Th atr contnt in prcntag rquir to fully aturat th oil at that oi ratio oul b (a) (b) (c) 5 () 7 8. A ry oil ha ma pcific graity of.5.if th pcific graity of oli i.7, thn th oi ratio ill b (a).5 (b). (c).5 (). 9. A clay ampl ha a oi ratio of.5 in ry tat an pcific graity of oli. 7. It hrinkag limit ill b (a) % (b).5% (c) 8.5% () % bit :.nginracamy.org

2 roprti of oil Ciil Enginring. A oil ha liqui limit of 6% platic limit of 5% an hrinkag limit of % an it ha a natural moitur contnt of 5%. Th liquiity inx of oil i (a).5 (b).5 (c).6 ().4. Conir th folloing tatmnt in rlation to th gin ktch: olum (cc)...5 Air atr oli # -, Ram Nagar, Bambala uliya h.: , ight (g)... oil i partially aturat at gr of aturation 6%. oi ratio 4%. atr contnt % 4. aturat unit ight.5 g/cc hich of th tatmnt i/ar corrct? (a), an (b), an 4 (c), an 4 (), an 4. A oil ha a liqui limit of 45% an li abo th A-lin hn plott on a platicity chart. Th group ymbol of th oil a pr I oil Claification i (a) CH (c) C (b) CI () MI. Th ry nity of a oil i.5 g/cc. If th aturation atr contnt r 5% thn it aturat nity an ubmrg nity oul, rpctily, b (a).5 g/cc an. g/cc (b). g/cc an. g/cc (c).5 g/cc an.5 g/cc ().5 g/cc an.5 g/cc 4. A fill haing a olum of,5. cum i to b contruct at a oi ratio of.8. Th borro pit oil ha a oi ratio of.4. Th olum of oil rquir (in cubic mtr) to b xcaat from th borro pit ill b (a),87,5 (b),, (c),, (),5, 5. Th moitur contnt of a clayy oil i graually cra from a larg alu. hat ill b th corrct qunc of th occurrnc of th folloing limit?. hrinkag limit. latic limit. iqui limit lct th corrct anr uing th co gin blo: (a),, (b),, (c),, (),, 6. Th initial an final oi ratio of a clay ampl in a conoliation tt ar an.5, rpctily. If initial thickn of th ampl i.4 cm, thn it final thickn ill b (a). cm (c).9 cm (b).8 cm (). cm 7. in that laticity inx (I) of local oil 5 an I of an zro, for a ir I of 6, th prcntag of an in th mix houl b (a) 7 (b) 6 (c) 4 () 8. A clayy oil ha liqui limit ; platic limit p an natural moitur contnt. Th conitncy inx of th oil i gin by (a) (c) (b) () bit :.nginracamy.org p p 9. Conir th folloing tatmnt:. Rlati compaction i not th am a rlati nity.. ibrofloatation i not ffcti in th ca of highly cohi oil.. Zro air oi lin an % aturation lin ar not intical. hich of th tatmnt i/ar corrct? (a) an (b) an (c) an () alon

3 oil Mchanic roprti of oil. A oil ha ma unit ight, atr contnt (a ratio). Th pcific graity of oil oli, unit ight of atr ; th gr of aturation of th oil i gin by (a) (b) (c) () ( ) ( ) ( ) ( ) ( ) # -, Ram Nagar, Bambala uliya h.: , Th aturat an ry niti of a oil ar rpctily kg/m an 5 kg/m. Th atr contnt (in prcntag) of th oil in th aturat tat oul b (a) 5 (b). (c) 5 () If a oil ampl of ight.8 kg haing a olum of 4 m an ry unit ight of 6 kg/m i mix ith. kg of atr thn th atr contnt in th ampl ill b (a) % (b) 5% (c) % () 5%. Match it-i (Trm) ith it-ii (Formula) an lct th corrct anr uing th co gin blo th lit: it-i it-ii A. oi Ratio. B. oroity. C. Dgr of aturation. D. atr contnt Co: A B C D (a) 4 5 (b) 5 4 (c) 4 5 () 5 4. If an unconfin compri trngth of 4 kg/ cm in th natural tat of clay ruc by four tim in th rmoul tat, thn it nitiity ill b (a) (b) (c) 4 () 8 5. Th alu of poroity of a oil ampl in hich th total olum of oil grain i qual to tic th total olum of oi oul b (a) 75% (b) 66.66% (c) 5% ().% 6. A oil ha a liqui limit of 4% an platicity inx of %. Th platic limit of th oil ill b (a) % (b) % (c) 4% () 6% 7. A ampl of aturat an ha a ry unit ight of 8 kn/m an a pcific graity of.7. If nity of atr i kn/m, th oi ratio of th oil ampl ill b (a).5 (b).6 (c).4 ().9 Common Data for Qution :8 & 9 For contructing an mbankmnt, th oil i tranport from a borro ara uing a truck hich can carry 6m of oil at a tim. Th tail ar a follo. roprty Bulk nity (g / cc) atr contnt (%) Borro ara Truck (loo) Fil (compact) Th quantity of oil to b xcaat from th borro pit, in m for a compact arth fill of m i (a) 4 cum (b) 46 cum (c) 98 cum () 87 cum 9. Th numbr of truck loa of oil rquir to obtain m of compact arth fill (a) no. (b) 56 no. (c) 5 no. () no bit :.nginracamy.org

4 4 roprti of oil Ciil Enginring. hn th prouct of rock athring i not tranport a imnt but rmain in plac, i call (a) alluial oil (b) glacial oil (c) riual oil () aolin oil. Aolian oil ar (a) Riual oil (b) in poit (c) raity poit () atr poit. If th poroity of a oil ampl i %, th oi ratio i (a). (b).8 (c). ().5. Conitncy Inx for a clayy oil i [{ iqui imit, I laticity Inx, natural moitur contnt] (a) (b) I I (c) ().5 4. If oil i ri byon it hrinkag limit, it ill ho (a) arg olum chang (b) Morat olum chang (c) o olum chang () No olum chang 5. Th toughn inx of clayy oil i gin by (a) laticity inx/flo inx (b) liqui limit /latic limit (c) iquiity inx /platic limit () latic limit/iquiity inx 6. A oil ampl in it natural tat ha ma of.9 kg an a olum of.5 m. Aftr bing on ri, th ma of th ampl i.5 kg. for oil i.68. Th oi ratio of th natural oil i (a).4 (b).45 (c).55 ().5 7. rincipl inol in th rlationhip btn ubmrg unit ight an aturat ight of a oil i ba on (a) Equilibrium of floating boi (b) Archim principl (c) tok la () Darcy la 8. A oil ampl ha a oi ratio of.5 an it poroity ill b clo to (a) 5% (b) 66% (c) % () % # -, Ram Nagar, Bambala uliya h.: , A borro pit oil ha a ry nity of 7 kn/m. Ho many cubic mtr of thi oil ill b rquir to contruct an mbankmnt of m olum ith a ry nity of 6 kn/m. (a) 94 m (b) 6 m (c) m () 9m 4. Th oi ratio an pcific graity of a oil ar.65 an.7 rpctily. Th gr of aturation (in prcnt) corrponing to atr contnt of % i (a) 65. (b).9 (c) 8.7 () A ry oil ampl ha qual amount of oli an oi by olum. It oi ratio an poroity ill b oi ratio oroity (%) (a). % (b).5 5% (c).5 % (). 5% 4. Th platicity inx an th prcntag of grain iz finr than micron of a clay ampl ar 5 an 5, rpctily. It actiity ratio i (a).5 (b).67 (c). ().6 4. A oil ampl haing a oi ratio of., atr contnt of 5% an a pcific graity of.6, i in a tat of (a) partial aturation (b) full aturation (c) or aturation () unr aturation 44. Th natural oi ratio of a an ampl i.6 an it nity inx i.6. If it oi ratio in th loot tat i.9, thn th oi ratio in th nt tat ill b (a). (b). (c).4 () hich on of th folloing corrctly rprnt th ry unit ight of a oil ampl hich ha a bulk unit ight of t at a moitur contnt of %? (a) (c) t t (b) () t t ( ) bit :.nginracamy.org

5 oil Mchanic roprti of oil in that cofficint of curatur.4, D mm, D.6 mm. Ba on thi information of particl iz itribution for u a ubgra, thi oil ill b takn to b (a) uniformly-gra an (b) ll-gra an (c) ry fin an () poorly-gra an 47. Th folloing ata r obtain from a liqui limit tt conuct on a oil ampl. Numbr of blo atr Contnt Th liqui limit of th oil i: (a) 6.% (b) 6.8% (c) 6.9% () 6.6% 48. Th oi ratio at th nt, loot an th natural tat of a an poit ar.,.6, an.4 rpctily. Th rlati nity of th poit i (a) % (b) 75% (c) 5% () 5% 49. hil computing th alu of limit of conitncy an conitncy inic, it i foun that liquiity inx, ha a ngati alu.. iquiity inx cannot ha a ngati alu an houl b takn a zro.. iquiity inx can ha a ngati alu.. Th oil tt i in mioli tat an tiff. 4. Th oil tt i in mium oft tat. hich of th tatmnt ar corrct? (a) an 4 (b) an (c) an 4 () an 5. hich on of th folloing rprnt rlati nity of aturat an poit haing moitur contnt of 5%, if maximum an minimum oi ratio of an ar.95 an.45 rpctily an pcific graity of an particl i.6? (a) 4% (b) 5% (c) 6% () 7% 5. Artion (A): A oil i at it liqui limit if th conitncy inx of th oil i qual to zro. Raon (R): Th conitncy inx of a oil i fin a ratio of (liqui limit minu th natural atr contnt) to (natural atr contnt minu platic limit). Co gin blo : (a) Both an R ar tru an R i th corrct xplanation of A (b) Both an R ar tru but R i not a corrct xplanation of A (c) A i tru but R i fal () A i fal but R i tru 5. Conitncy a appli to cohi oil i an inicator of it (a) nity (b) moitur contnt (c) har trngth () poroity 5. Th ratio of aturat unit ight to ry unit ight of a oil i.5. If th pcific graity of oli ( ) i.65, th oi ratio of th oil i (a).65 (b).66 (c).944 () In th pha iagram gin th chang u to initial tat changing into final tat i hon u to conoliation. Dpth of oil layr unrgoing conoliation i H; i initial oi ratio; r i final oi ratio; i chang in oi ratio. atr atr Initial tat Final tat Inicat hich of th folloing xprion gi ttlmnt of th layr. (a) H log (c) (b) log H () H # -, Ram Nagar, Bambala uliya h.: , bit :.nginracamy.org

6 6 roprti of oil Ciil Enginring 55. match it-i (Unit/Tt) ith it-ii (urpo) an lct th corrct anr uing th co gin blo th lit it-i A. Caagran apparatu B. Hyromtr C. lat loa tt D. Oomtr it-ii. Dtrmination of grain iz itribution. Conoliation charactritic. Dtrmination of conitncy limit 4. Dtrmination of af baring capacity of oil Co: A B C D (a) 4 (b) 4 (c) 4 () To oil ampl A an B ha poroiti n A 4% an n B 6% rpctily. hat i th ratio of oi ratio A : B? (a) : (b) : (c) 4 : 9 () 9 : Match it-i (Dniti) ith it-ii (Exprion) an lct th corrct anr uing th co gin blo th lit: (ymbol,, an tan for pcific graity of oil grain, oi ratio, unit ight of atr an gr of aturation rpctily) it-i it-ii A. Dry nity. B. Moit nity. ( ) ( ) C. ubmrg nity. ( ) ( ) ( ) D. aturat nity 4. ( ) Co: A B C D (a) 4 (b) 4 (c) 4 () hat ar th rpcti alu of oi ratio, poroity ratio an aturat nity (in kn/m ) for a oil ampl hich ha aturation moitur contnt of % an pcific graity of grain a.6? (tak nity of atr a kn/m ) (a).5,.8, 8.7 (b).5,.4, 8.7 (c).77,.8, 6.64 ().5,., Embankmnt fill i to b compact at a nity of 8 kn/m. Th oil of th borro ara i at a nity of 5 kn/m. hat i th timat numbr of trip of 6 m capacity truck for hauling th oil rquir for compacting m fill of th mbankmnt? (Aum that th oil in th borro ara an that in th mbankmnt ar at th am moitur contnt) (a) 4 (b) 8 (c) () 6. ll-gra n aturat an ha high har trngth bcau (a) uch an ha a bttr gra (uprior typ of an grain rulting in highr trngth (b) uch an ha lor atr contnt, hich incra har trngth (c) uch an ha bttr intrlocking of grain, highr intr-particl contact an highr intrparticl frictional ritanc rulting in highr trngth () prnc of atr in uch an inuc capillary prur gnrating highr intr granular tr, hich gnrat apparnt cohion an hnc highr har trngth. # -, Ram Nagar, Bambala uliya h.: , bit :.nginracamy.org

7 oil Mchanic roprti of oil 7 ANER AND EXANATION. An. (c) Actiity laticity Inx % of clay fraction An. () pcific raity of oli i gin by. An. (a) ( ) ( 4 ) hrinkag limit,..7.7 oroity, 4. An. (c).7 n.%.7 oi ratio, air oi + atr fill oi 6 ; /. / 5 An. (c) Th olum of oil incra from platic limit to liqui limit. Th cracking in oil i u to ruction in baring capacity an conqunt failur an haing. 6. An. () % (iqui imit) laticity < 5 o 5 5 Intrmiat > 5 High oil abo A-lin ar clay an oil blo A- lin ar ilt an organic oil. Equation of A-lin i, I.7 ( ) 7. An. (b) in, % 8. An. (b).78 %.6 ( n) m m i ma pcific graity m i pcific graity of oli An. (c) m At hrinkag limit, oil i fully aturat %.5. An. (c) iquiity Inx Conitncy Inx.6.4. An. (b) Dgr of aturation partially aturat. n oi ratio. 6%.... 6%.5 % # -, Ram Nagar, Bambala uliya h.: , bit :.nginracamy.org

8 8 roprti of oil Ciil Enginring atr contnt. %. aturat unit ight... t.5 g / cc...5 In ca of fully aturat conition air oi ill b fill by atr.. An. (b) iqui limit 45% li btn 5% to 5% for intrmiat platicity. Th oil abo A lin houl b gin ymbol Cl.. An. (c) at ( ) g / cc ub at.5..5 g / cc 4. An. (b) olum of oli ill rmain am in fill an barro pit ; fill borro pit 5 ;,, cum An. (c) iqui limit > latic limit > hrinkag limit 6. An. (b) H ; H.5 H.4 H.6 cm; Hf H H cm 7. An. (b) Auming in mix, x part i an an ( x) part i oil x(i) an ( x)i I of mix oil 6 x ( x) 5 x % An. (a) 9. An. (a) Zro air oi lin an % aturation lin ar intical.. An. (b). An. (b) t 5..%. An. (b) Dry ight of ampl 6 r 4. 6 kg ight of atr in oil bfor mixing aitional quantity.8.6. kg Aftr mixing atr th total quantity of atr kg atr Thu, atr contnt.4 5%.6. An. () Dgr of aturation, Dnity of atr i gm/cc. 4. An. (c) (UC) nitiity (UC) 5. An. () in, oi ratio, oroity, natural rmoul (4 / 4).5 n or.%.5 6. An. (a) latic limit, p I 4 % 7. An. (a) # -, Ram Nagar, Bambala uliya h.: , bit :.nginracamy.org

9 oil Mchanic roprti of oil 9 8. An. (a) 9. An. (c).7 8 Borro pit.5 # -, Ram Nagar, Bambala uliya h.: , Truck Embankmnt.66 gm cc.5 gm cc.8 gm cc 8% 6% 4% gm cc gm cc gm cc.4 To fin olum of borro pit ( ) th folloing quation may b u. ; m ay 4 m To fin numbr of trunk loa : ; m No. of truck loa ay 5 no.. An. (c). An. (b). An. (). An. (a) 4. An. () 5. An. (a) 6. An. () 47 6 in.68, Tak.9.5 atr contnt, 4.5 no ; n..5 n. Kg/m 99 Kg/m An. (b) 8. An. ().5% Kg/m.68 ; n.5..%.5 9. An. (a) Borro pit: 7kN/m ; olum Embankmnt: 6kN/m ; m Uing th rlationhip, bit :.nginracamy.org

10 roprti of oil Ciil Enginring 4. An. (c) ; 94. m min 45. An. (c) min An. ()..7 ;.65 r r r % oi ratio, oroity, n 4. An. (b) Actiity # -, Ram Nagar, Bambala uliya h.: , % laticity Inx rcnt of clay particl finr than m A actiity i mor than.5 o it i acti oil. 4. An. (b) 6 5 %. Thrfor oil i fully aturat. Rmmbr 44. An. (c) Dnity Inx % alay can b mor than % can b mor than.. max max min.6 oi ratio in loot tat, max.9 oi ratio in natural tat, An. (b) Cofficint of curatur C c D D D 6 t t ( ) D 6 Cofficint of uniformity, C u C D c D D 6 D c bit :.nginracamy.org C D D A < C c < an C u > 6 o it i ll gra an. 47. An. (c) iqui limit i th atr contnt corrponing to numbr of blo of An. (c) Rlati nity or Dnity inx, 49. An. () I D max max Conitncy inx I min 5% can b gratr than p 5. An. (c) At aturat moitur contnt oi ratio i Rlati nity, p

11 oil Mchanic roprti of oil D r 5. An. (c) For max max min Conitncy inx 5. An. (c) D r 6%.6 Conitncy of oil rfr to th ritanc offr by it againt forc that tn to form or ruptur th oil aggrgat. It i rlat to trngth. 5. An. (b) in at at 54. An. () at.5,.65 ;.65 ; ttlmnt, H 55. An. () 56. An. (c) na.4 A n.6 B A nb.6 n.4 A B B 4 9 f H H 57. An. (a) Moit nity, For ry nity put For aturat nity put ubmrg nity aturat nity nity of atr 58. An. () in %,.6, %.6.5 ; n at kn/m.4 If nity of atr i takn a 9.8 kn/m 59. An. (c) at.4 kn/m In problm of fill an borro pit, th olum of oil oli hall b quat. ( ) A th moitur contnt of borro ara an that of mbankmnt ar am. For m fill at mbankmnt, th olum rquir from borro pit 8 5 m Numbr of trip of truck 6 6. An. (c) # -, Ram Nagar, Bambala uliya h.: , bit :.nginracamy.org