42,

45.

Which part of a carburetor shuts of the air supply to aid cold starting?

(^) Throttle (B) Strangler
(0 Float Needle valve (D) Choke valve
The function of oil serapper ring is to :
(ക) Retain compression (B) Lubricate cylinder walls
(0) Maintain vacuum (D) Reduce piston wear

The escape of burned gases from the combustion chamber to the pistons and into the
crankcase is called as :

ക Gas Loss (B) Blow by
(C) Crank case ventilation (D) Bypass

The maximum pressure of air fuel mixture at the end of compression in petrol engine varies
from :

(ಗ) 10-90 1? (8). 80-100 Kgfem?
(©) 6-101/2 (D) 10-20 Kg/em?

46. The percentage of energy in the petrol burnt in the engine which is actually utilized in
propelling the vehicle is :
(A) 40% ®) 60%
(C) 25% (യ) 20%
47. Cetane number of diesel fuel is a measure of :
(A) Volatility (B) Delay Period
(C) Viscosity (D) Specific gravity
48. Excessive pressure build up in force feed lubrication aystem prevented by :
(A) Relief valve (8) Stop valve
(C) Balancer (D) Pressure reducing valve
49. A single cylinder two-stroke engine rotates at 3000 rpm. The number of power strokes per
minute is :
(&) 1500 (B) 3000
© 750 (2) 6000
50, Water circulation in a thermo-syphon cooling system caused by :
(4) Conduction currents (B) A belt driven water pump
(C) Abelt driven impeller (D) Change in density of water
061/2016 8 A