Automobile Engineering MCQ Questions & Answers

1

A front stabilizer bar is used to

A) Increase vehicle load carrying capacity B) Provide a softer ride C) Control suspension movement and body roll D) All of the above

Discuss

Answer & Solution

Answer: Option C

Solution:

front stabilizer bar is a part of many automobile suspensions that helps reduce the body roll of a vehicle during fast cornering or over road irregularities.

2

The aluminium alloy is used in cylinder blocks because

A) It is lighter and has good heat dissipation characteristics B) Material cost is low C) It does not require any cylinder liners D) The piston is also made of aluminium alloy

Discuss

Answer & Solution

Answer: Option A

Solution:

The aluminium alloy is used in cylinder blocks because It is lighter and has good heat dissipation characteristics

3

The main function of a master cylinder is to

A) Adjust the extent of brake pedal free play B) Boost the force applied to brake pedal C) Convert brake pedal force into hydraulic pressure D) Ensure that all the wheel brakes are supplied with the same amount of fluid pressure

Discuss

Answer & Solution

Answer: Option C

Solution:

The master cylinder, also known as the master brake cylinder, converts the pressure on the brake pedal to hydraulic pressure by feeding brake fluid into the brake circuit and controlling this according to the mechanical force.
Master brake cylinders are used both in disc brakes and drum brakes.

4

The firing order for an inline four cylinder I.C. engine is

A) 1-2-3-4 B) 1-3-4-2 C) 1-2-4-3 D) 1-3-2-4

Discuss

Answer & Solution

Answer: Option B

Solution:

The firing order for an inline four cylinder I.C. engine is 1-3-4-2

5

The firing order for an opposed four cylinder l.C. engine is

A) 1-2-3-4 B) 1-3-4-2 C) 1-4-3-2 D) 1-3-2-4

Discuss

Answer & Solution

Answer: Option C

Solution:

The firing order for an opposed four cylinder l.C. engine is 1-4-3-2

6

The indicated power of a four stroke engine (in watts) is equal to (where P = Mean effective pressure in N/m², L = Length of stroke in metres, A = Cross-sectional area of the piston in m² and N = Speed of the engine in revolutions per second (r.p.s)

A) $$\frac{{{\text{P}}{\text{.L}}{\text{.A}}{\text{.N}}{\text{.}}}}{2}$$ B) P.L.A.N. C) 2 × P.L.A.N. D) $$\frac{{{\text{P}}{\text{.L}}{\text{.A}}{\text{.N}}{\text{.}}}}{4}$$

Discuss

Answer & Solution

Answer: Option A

Solution:

7

The rating of C.I. engine fuel (Diesel) is given by

A) Octane number B) Performance number C) Cetane number D) None of these

Discuss

Answer & Solution

Answer: Option C

Solution:

Cetane number is an indicator of the combustion speed of diesel fuel and compression needed for ignition.
The rating of C.I. engine fuel (Diesel) is given by cetane number.

8

The capacity of a battery is usually expressed in terms of

A) Volts B) Amperes C) Weight D) Ampere hours

Discuss

Answer & Solution

Answer: Option D

Solution:

The capacity of a battery is usually expressed in terms of Ampere hours

9

If clearance volume of I.C. engines is increased, the compression ratio will

A) Increase B) Decrease C) Remain constant D) Be doubled

Discuss

Answer & Solution

Answer: Option B

Solution:

If clearance volume of I.C. engines is increased, the compression ratio will Decrease

10

The calorific value of Diesel is about

A) 36.5 MJ/kg B) 38.5 MJ/kg C) 42.5 MJ/kg D) 45.5 MJ/kg

Discuss

Answer & Solution

Answer: Option D

Solution:

The calorific value of diesel fuel is roughly 45.5 MJ/kg (megajoules per kilogram), slightly lower than petrol which is 45.8 MJ/kg. However, diesel fuel is denser than petrol and contains about 15% more energy by volume (roughly 36.9 MJ/litre compared to 33.7 MJ/litre)

Automobile Engineering MCQ Questions & Answers | Mechanical Engineering