B:-At the end of compression stroke
C:-Beginning of suction stroke
D:-Beginning of compression stroke
Correct Answer:- Option-B
Question64:-Which of the following character is the ability of the fuel to evaporate?
A:-Viscosity
B:-Octane number
C:-Volatility
D:-Cetane number
Correct Answer:- Option-C

Question65:-Why is there a vent hole provided either in filler neck or cap in an
engine fuel tank?

A:-To maintain diesel level

B:-To maintain fuel temperature
C:-To avoid overflow

D:-To maintain atmospheric pressure
Correct Answer:- Option-D

Question66:-Which of the following statement is/are correct about construction of a
plunger type fuel feed pump in a diesel engine?

i. The fuel feed pump consists of a barrel, a plunger and plunger return spring.

ii. The fuel feed pump consists of spindle, roller tappet, suction and delivary valve
iii. The fuel feed pump consists of plunger, plunger return spring and glass wool or
steel wool

A:-Only (i and iii)

B:-Only (ii and iii)

C:-Only (i and ii)

D:-All of the above (i, ii and iii)

Correct Answer:- Option-C
Question67:-Which of the following sensors are fail, the engine will not start?

A:-IAT and Oxygen

B:-TP and CKP

C:-IAT and ECT

D:-ECT and Oxygen

Correct Answer:- Option-B

Question68:-What is the name of the pipe line from FIP to Injector in a diesel fuel
feed system?

A:-Delivery pipe
B:-Low pressure pipe