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)