QUESTION BANKCATEGORY-II

1) Auto Collimator is used to check:a) Roughnessb) Flatnessc) Angled) Automobile Balance

2) Ideal surface roughness as measured by the maximum height of unevenness, is best achieved when the material is removed bya) An end millb) A Grinding wheelc) A ball milld) A tool with Zero Nose radius

3) In the specification of dimensions & fits:a) Allowance is equal to bilateral toleranceb) Allowance is equal to unilateral tolerancec) Allowance is independent of toleranced) Allowance is equal to the difference between maximum & minimum dimensions specified by the tolerance.

4) An IC Engine has Bore & Stroke of 2 units each. The maximum volume of the air swept by this engine will bea) 2b) c) 4d) 8

5) Bolts in the flanged ends of pressure vessel are pre tensioned. Indicate which is NOT TRUEa) Pre Tensioning helps to seal the pressure vesselb) Pre Tensioning increases the fatigue life of the boltsc) Pre Tensioning reduces the maximum tensile stress in the bolt.d) Pre Tensioning helps to reduce the effect of pressure pulsations in the pressure vessel

6) Which of the following materials require largest shrinkage allowance, while making a pattern of castinga) Aluminiumb) Brassc) Cast Irond) Plain Carbon Steel

7) Choose the correct statement:a) A fixture is used to guide the tool as well as to locate and clamp the work piece. b) A jig is used to guide the tool as well as to locate and clamp the work piece. c) Jigs are used on CNC machines to locate and clamp the work piece and also to guide the tool.d) No arrangement to guide the tool is provided in a Jig.

8) A thin walled cylindrical vessel of thickness t and inside diameter d is filled with a gas at pressure p. The maximum stress in the cylinder will be :a) Pd/2tb) Pd/tc) Pd/4td) Pd/8t

9) The silencer of an IC Engine a) Reduces Noiseb) Decreases brake specific fuel consumption (BSFC)c) Increases BSFCd) Has no effect on the efficiency

10) Abrasive material used in grinding wheel selected for grinding ferrous alloy is a) Silicon Carbideb) Diamondc) Aluminium Oxided) Boron Carbide

11) Cast Steel Crank Shaft surface is hardened bya) Nitridingb) Normalisingc) Carburisingd) Induction Heating

12) Disposable patterns are made ofa) Woodb) Rubberc) Metald) Polystyrene

13) A fit is specified as 25H8/e8. The tolerance value for a nominal diameter 25mm in IT8 is 33 microns and fundamental deviation for the shaft is -40 microns. The maximum clearance of the fit in microns isa) -7b) 7c) 73d) 106

14) The area moment of Inertia of a square of size 1 unit about its diagonal isa) 1/3b) 1/4 c) 1/6d) 1/12

15) A Static fluid can havea) Non-zero normal and shear stressb) Negative normal and zero shear stressc) Positive normal and zero shear stressd) zero normal stress and non-zero shear stress

16)