AE302,ME302,DAE14,DME14
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1 AE302,ME302,DAE14,DME14 III SEMESTER DIPLOMA EXAMINATION, JANUARY-2013 MANUFACTURING TECHNOLOGY-I Time: 3 Hours Max. Marks: 75 GROUP A : Answer any three questions. (Question No. 1 is compulsory) Q.1 What is pattern? (05) Q.2 Write a brief note on welding and its classification. (10) Q.3 Sketch and explain single spindle automobile screw cutting machine. (10) Q.4 What are the differences between semi automatic and fully automatic lathes? (10) Q.5 What are the different types of gauges used in industries? (10) GROUP B : Answer any three questions. (Question No. 6 is compulsory) Q.6 What is forging? (05) Q.7 Explain briefly the different types of allowances given for moulding? (10) Q.8 With sketch explains mechanical and electronics comparators. (10) Q.9 What are different types of hardening? (10) Q.10 What are the different types of carburizing? (10) GROUP C: All Questions are Compulsory. Q. 11. Fill in the blanks (Each question carries 2 marks) (ii) is a most suitable material for die-casting. In a automatic lathe the production cost is gauges are used to check the internal and external radius of work peace. has one measuring face at 90 0 another at 45 0 to the role. The 4 jaw chuck is known as chuck. Q.12 Multiple choice question. (Each question carries 2 marks) (ii) The forging done by power hammers is. (a) Press forging (b) Roll forging (c) Drop forging (d) Upset forging The precision instrument used to measure job within an accuracy of 0.01 mm is. (a) Vernier caliper (b) Engineer s steel rule (c) Outside micrometer (d) Depth micrometer Trowels are used to. (a) Fill the mould (b) Cut the ingates (c) Make the joints (d) All of the above.
2 The temperature for baking the cores vary from. (a) to C (b) to C (c) to C (d) None of the above MIG weld is also known as. (a) TIG (b) Gas welding (c) GMAW (d) Thermit welding. Q.13 True or false (Each question carries 1 marks) Mandrels are devices used to hold the job for machining on lathes. (ii) Plasma welding is an extension of TIG welding. Bench moulding is carried out fully in moulding boxes. In friction welding, friction is employed to generate heat between two sliding or rotating metal surfaces. Tempering is to increase brittleness and increase the ductility. ******
3 AE304,DAE16,ME304DME16 III SEMESTER DIPLOMA EXAMINATION, JANUARY-2013 MACHINE DRAWING Time: 3 Hours Max. Marks: 75 GROUP A : Answer any three questions. (Question No. 1 is compulsory) Q.1 Compare revolved section and removed section. (05) Q.2 Explain clearance fit with an example. (10) Q.3 Draw a sketch and indicate all location of surface roughness symbols in it.(10) Q.4 Differentiate right hand thread from left hand thread. (10) Q.5 Sketch the hole basis system and shaft basis system. (10) GROUP B : Answer any three questions. (Question No. 6 is compulsory) Q.6 Write the proportions for the rectangular sunk key? (05) Q.7 Draw a square headed bolt of 24mm diameter and 96mm long with hexagonal. (10) Q.8 Draw two views of a hexagonal nut in free hand. (10) Q.9 Draw any three rivet heads. (10) Q.10 Explain briefly Auto CAD theory used for drafting drawings. (10) GROUP C: All Questions are Compulsory. Q. 11. Fill in the blanks (Each question carries 2 marks) (ii) A key which is having uniform width and tapering thickness is is the outermost portion which joins the two sides of a thread. is a device used to raise or lower a weight by rotating screw. A saddle key is placed on the flat surface made on the shaft. A right left thread nut screws on a bolt when it is turned. Q.12 Multiple choice question. (Each question carries 2 marks) In limits & fits system, basic shaft system is one whose. (a) Lower deviation is 0 (b) Upper deviation is 0 (c) Minimum clearance is 0 (d) Maximum clearance is 0 (ii) Expressing a dimension as mm is the case of (a) Unilateral tolerance (b) Bilateral tolerance (c) Limiting dimension (d) All of these In which section the cross section is shown separately? (a) Full section
4 (b) Half section (c) Offset section (d) Removed section Rectangular sunk key proportions is. (a) W = 0.25D + 2mm (b) W = 0.52D + 2mm (c) W = 0.25D + 5m (d) W = 0.52D + 5m A capstan or turret lathe is a production lathe used to produce identical pieces in quantity of. (a) Infinite (b) 100 (c) 85 (d) 600 Q.13 True or false (Each question carries 1 marks) Fit is the term used to indicate the condition of tightness or looseness between two mating parts assembled together. (ii) Shaft refers to any internal dimension of a component. Feather key is a segment of a disc having uniform thickness. Section view is needed to eliminate the hidden lines. An Optical comparator is also called a comparator in context. ******
5 AE305/DAE17-L III SEMESTER DIPLOMA AUTOMOBILE ENGINEERING EXAMINATION JANUARY-2013 ENGINEERING MECHANICS Time: 1 hours (5X5=25) I. ANSWER ALL QUESTIONS. 1. Determination of Coefficient of discharge of a Orifice meter 2. Performance test on a reciprocating pump 3. Performance test on a centrifugal pump 4. Tests on springs of circular section 5. Performance test on an impulse turbine
6 AE306/DAE18-L III SEMESTER DIPLOMA AUTOMOBILE ENGINEERING EXAMINATION JANUARY-2013 WORKSHOP-I Time: 1 hours (5X5=25) I. ANSWER ALL QUESTIONS. 1. Round rod to hexagonal rod 2. Round rod to square rod 3. Round rod to square headed bolt 4. Round rod to S Shape 5. Round rod to flat with 25mm
7 AE303,ME303 DAE15, DME15 III SEMESTER DIPLOMA EXAMINATION, JANUARY-2013 FLUID MECHANICS Time: 3 Hours Max. Marks: 75 GROUP A : Answer any three questions. (Question No. 1 is compulsory) Q.1 What is the function of accumulator? (05) Q.2 With neat sketch explain any two pressure measurement devices. (10) Q.3 A venturimeter is installed in a horizontal pipe line 300mm diameter. The dia at the throat is 150mm. The differential mercury water manometer shows a deflection of 200mm. Determine venture head and discharge, if the coefficient of meter is (10) Q.4 What is a draft tube? Mention the functions of the same. (10) Q.5 What is the function of air filter used in pneumatic system? How they are classified? Explain briefly. (10) GROUP B : Answer any three questions. (Question No. 6 is compulsory) Q.6 Define atmospheric pressure. (05) Q.7 Write a brief note on impulse turbine and reaction turbine with sketch. (10) Q.8 Explain the working of hydel power plant with a neat sketch. (10) Q.9 Explain briefly about different types of accumulators with a neat sketch. (10) Q.10 Draw a hydraulic circuit of a shaping machine s quick return motion and explain its working. (10) GROUP C: All Questions are Compulsory. Q. 11. Fill in the blanks (Each question carries 2 marks) Hydraulic accumulators are used for of hydraulic energy. (ii) Gay Lussac s law relates the absolute pressure and temperature of a given quantity of gas held at is a mixed flow of type of reati on turbine. leads to pitting & also reduces efficiency The ratio of specific weight of a liquid to the specific weight of pure water is known as. Q.12 Multiple choice question. (Each question carries 2 marks) (ii) The stream of liquid issuing from a nozzle is known as. (a) Path (b) Flow (c) Jet (d) Line It is used to measure the discharge in a pipe. (a) Centrifugal Pump (b) reciprocating pump (c) Venturimeter (d) Manometer
8 The unit of dynamic viscosity is. (a) N.s/m 2 (b) Pa.s (c) Both a & b (d) N/m 2.s Accumulator is used to store. (a) Energy (b) Pressure (c) Temperature (d) None of them The flow rate through a circular pipe is measured by. (a) Pitot Tube (b) Venturimeter (c) Oribuimeter (d) None of them Q.13 True or false (Each question carries 1 marks) Hydraulic accumulators are used for permanent storage of hydraulic energy. (ii) Reciprocating pump is a rotodynamic pump. Cavitations happen in centrifugal pump. In case of laminar flow fluid particle moves in well defined path. FRL unit is used in Hydraulic System. ******
9 EE304,CE301,AE301,ME301,DAE13, DCE13, DEE13, DME13 III SEMESTER DIPLOMA EXAMINATION, JANUARY 2013 ENGINEERING MECHANICS Time: 3 Hours Max. Marks: 75 GROUP A : Answer any three questions. (Question No. 1 is compulsory) Q.1 Define any five Mechanical properties of material. (05) Q.2 Explain types of stresses & strain. (10) Q.3 Distinguish between ductility and Malleability of materials. (10) Q.4 A load of 500 kn is applied on a short column 25 mm 250 mm. The column is reinforced with steel bars of total area 2512 mm 2. If the modulus of elasticity for steel is 18 times that of concrete. Find the stresses in concrete and steel. If the stress in concrete shall not exceed 5 N / mm 2, find the area of steel required so that the column may support a load of 600 KN. (10) Q.5 A boiler shell is 1.8 m in diameter and 15mm in thickness. The permissible tensile stress in the boiler is not to exceed 70N / mm 2. Determine the allowable working pressure of the boiler. (10) GROUP B : Answer any three questions. (Question No. 6 is compulsory) Q.6 Explain types of loading. (05) Q.7 Derive the expression for thin walled cylinder with respect to torsional rigidity. (10) Q.8 A simply supported beam is subjected to a combination of loads as shown in figure draw the S.F. and B.M. diagrams and find the position and magnitude of maximum B.M. (10) Q.9 Derive an expression for (10) a ) Cantilever subjected to udl over whole length. b) Cantilever subjected to udl on part span form support Q.10 A hollow steel shaft 300 mm external and 220 mm internal diameter is to be replaced by a solid alloy shaft. If both the shaft should have the same polar modulus, find the diameter of the latter and the ratio of torsional rigidities. Take C for steel =2.4 C for alloy. If alternatively the two shafts should have the same torsional rigidity, find the ratio of their polar module. (10) GROUP C: All Questions are Compulsory. Q. 11. Fill in the blanks (Each question carries 2 marks) The thermal stress in bar is proportional to the change in temperature. (ii) The deformation at the bar per unit length in the direction of the force is known as The ultimate tensile stress for mild steel is the ultimate compressive stress. The neutral axis at a beam is subjected to stress The spring used to absorb shocks and vibrations is.
10 Q.12 Multiple choice question. (Each question carries 2 marks) (ii) Bulk modulus is given by. (a) Direct stress / Volumetric strain (b) Stress / Strain (c) Shear stress / Shear strain (d) Strain / Stress Power transmitted by a shaft is given by. 2 ft 2 NT (a) kw (b) kw ft 2 NT (c) kw (d) kw How many reactions are offered by a roller support? (a) 4 (b) 3 (c) 2 (d) 1 The ration of linear stress to linear strain is called. (a) Modulus of rigidity (b) Modulus of elasticity (c) Bulk modulus (d) Poisson s Ratio The unit of stress in S.I units is. (a) N/mm 2 (b) KN/mm 2 (c) N/mm 2 (d) none of these Q.13 True or false (Each question carries 1 marks) Stress is equal to the force divided by area. (ii) Moment of inertia is also called as second moment of area. load is called as brittle material. A material which does not break in to pieces under a tensile load or impact In a leaf spring, the length of leaves are equal. EI Flextural rigidity = L ******
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