Questions and answers for exam Preparation

MCQs

Total Questions : 1197 | Page 53 of 120 pages

Question 521.

The octane rating of petrol commerically available is

85-95
95-100
100-110
110-125

Discuss Question

Answer: Option A. -> 85-95

Question 522.

The crescent-shaped cavity on the piston head top surface is called as

piston oil hole
snap ring
valve recess
valve clearance

Discuss Question

Answer: Option C. -> valve recess

Question 523.

The driveshafts are connected to the differential and wheel hubs through universal joints because the universal joints

absorb the vibrations transferred from the surface of the road
compensate for variations in the relative positions of the differential and the wheels which result from bumpy road surfaces or other similar driving conditions.
absorb any difference in speed between the left and right wheels when the vehicle is turning
none of the above

Discuss Question

Answer: Option B. -> compensate for variations in the relative positions of the differential and the wheels which result from bumpy road surfaces or other similar driving conditions.

Question 524.

The function of antilock brake system (ABS) is that is

reduces the stopping distance
minimises the brake fade
maintains directional control during braking by preventing the wheels from locking
prevents nose dives during braking and thereby postpones locking of the wheels

Discuss Question

Answer: Option C. -> maintains directional control during braking by preventing the wheels from locking

Question 525.

The braking control type traction control system (TCS) generally operates in the speed range of

less than 20 kmph
less than 40 kmph
less than 60 kmph
more than 60 kmph

Discuss Question

Answer: Option B. -> less than 40 kmph

Question 526.

If the spark plug deposit indicates black coating of soot, it indicates that the engine has been generally operating on

too lean mixture
stoichiometric mixture
most economical mixture
too rich mixture

Discuss Question

Answer: Option D. -> too rich mixture

Question 527.

A worm gear is used as the pinion for the rack and pinion type of steering gearbox, because it

improves steering comfort when steering wheel is turned to effect small changes in the direction of forward motion
allows the steering wheel to be turned by a greater amount when steering
makes the steering more responsive
reduces the amount of kick-back for large steering angles

Discuss Question

Answer: Option A. -> improves steering comfort when steering wheel is turned to effect small changes in the direction of forward motion

Question 528.

The number of exhaust manifolds in a V-6 engine are

one
two
four
eight

Discuss Question

Answer: Option B. -> two

Question 529.

The purpose of a cylinder head gasket is to

prevent the combustion gases from leaking from the joint between the cylinder block and the cylinder head
prevent engine oil from going into combustion chamber
removes impurities from cylinder head lubricating oil
none of the above

Discuss Question

Answer: Option A. -> prevent the combustion gases from leaking from the joint between the cylinder block and the cylinder head

Question 530.

The function of a first compression ring (top ring) is that it

increases the combustion temperature
creates swirl
maintains a seal and prevents the fuel leakage
maintains a seal and prevents escape of burned gases and loss of pressure in the combustion chamber

Discuss Question

Answer: Option D. -> maintains a seal and prevents escape of burned gases and loss of pressure in the combustion chamber