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Which of the following is not a precision measuring instrument?

" (A) Outside micrometer (B) Dial indicator
(C) Vernier height gauge (D) Universal surface gauge
A round rod which does not have a head, and has external threads at both ends is called :
(4) Stud (3) Bolt
(0 Nut (D) Screw

Snips are used for :
(A) Cutting away thick layer एव metal (B) Cutting sheet metal
(£) Catting wooden blocks (D) Cutting external threads

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) Compression ratio

The power available at the engine's flywheel is called :
(A) Indicated horse power 18) Brake horse power
(C) Frictional horse power (D) Overall efficiency

Opening and closing of the valves in relation to the position of piston and flywheel is called :
(4) Valve lead (B) Valve lag
(9) Valve overlap (D) Valve timing

The type of piston pin generally used in heavy duty diesel engine is :

(4) Fully floating piston pin (B) Semi floating piston pin
(C) Set screw type piston pin (D) Three-quarter type piston pin
“Beuffing” occurs when :

(A) Piston slides against cylinder without lubrication
(B) Piston clearance is excessive

(C) Piston rings are worn out

(D) Cylinder liner is worn out

When the piston is at BDC, volume of the cylinder above the piston is?
(A) Clearance volume ற volume
(0) Total volume (D) Compression ratio

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