31-When the piston is at BDC, volume of the cylinder above the piston is:

(A) Clearance volume

(B) Swept volume

(C) Total volume

(D) Compression ratio

32-“Scuffing” occurs when:

(A) Piston slides against cylinder without lubrication

(B) Piston clearance is excessive

(C) Piston rings are worn out

(D) Cylinders liner is worn out

33-Opening and closing of the valves in relation to the position of piston and flywheel is called:

(A) Valve lead

(B) Valve lag

(C) Valve overlap

(D) Valve timing

34-The ratio of work output of an engine to the fuel energy burnt is called

(A) Mechanical efficiency

(B) Volumetric efficiency

(C) Thermal efficiency

(D) Overall efficiency

35-Snips are used for

(A) Cutting away thick layer of metal

(B) Cutting sheet metal

(C) Cutting wooden blocks

(D) Cutting external threads

36-A round rod which does not have a head, and has external threads at both ends is called:

(A) Stud

(B) Bolt

(C) Nut

(D) Screw

37-Which of the following is not a precision measuring instrument?

(A) Outside micrometer

(B) Dial indicator

(C) Vernier height gauge

(D) Universal surface gauge

38-The cross-sectional shape of an allen key is:

(A) Square

(B) Pentagon

(C) Hexagon

(D) Octagon

39-Which file has minimum space between their teeth?

(A) Rough files

(B) Smooth files

(C) Coarse files

(D) Bastard files

40-Which of the following is used for securing a tightened nut in position?

(A) Key

(B) Cotter pin

(C) Snap ring

(D) Gasket

ANSWERS:

31-(C), 32-(A), 33-(D), 34-(C), 35-(B), 36-(A), 37-(D), 38-(C), 39-(B), 40-(D)