Automobile Engineering MCQ Questions & Answers

61

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

A) Improves steering comfort when steering wheel is turned to effect small changes in the direction of forward motion B) Allows the steering wheel to be turned by a greater amount when steering C) Makes the steering more responsive D) Reduces the amount of kickback for large steering angles

Discuss

Answer & Solution

Answer: Option A

Solution:

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

62

The petrol engines are also known as

A) Spark ignition (S.I.) engines B) Compression ignition (C.I.) engines C) Steam engines D) None of these

Discuss

Answer & Solution

Answer: Option A

Solution:

The petrol engines are also known as Spark ignition (S.I.) engines

63

The Diesel engines are also known as

A) Spark ignition (S.I.) engines B) Compression ignition (C.I.) engines C) Steam engines D) None of these

Discuss

Answer & Solution

Answer: Option B

Solution:

The Diesel engines are also known as Compression ignition (C.I.) engines

64

The self ignition temperature of Diesel as compared to petrol is

A) Higher B) Lower C) Same D) Depends on fuel quality

Discuss

Answer & Solution

Answer: Option B

Solution:

The self ignition temperature of Diesel as compared to petrol is lower

65

A laminated glass upon cracking

A) Bursts into sharp edged fragments B) Bursts into granular pieces C) Sandwiched layer traps the fragments D) Breaks into the form of crystals

Discuss

Answer & Solution

Answer: Option C

Solution:

A laminated glass upon cracking Sandwiched layer traps the fragments

66

Highest useful compression ratio (HUCR) is the highest compression ratio at which the

A) Engine can run B) Engine gives maximum output C) Engine is most efficient D) Fuel can be used in a test engine without knocking

Discuss

Answer & Solution

Answer: Option D

Solution:

Highest Useful Compression Ratio (HUCR) is the compression ratio at which a fuel can be used without detonation in a specified test engine under specified operating condition and the ignition and mixture strength being adjusted to give best efficiency

67

When the battery is half (50%) charged, the specific gravity of acid in a battery is usually

A) 0.74 B) 1.00 C) 1.12 D) 1.19

Discuss

Answer & Solution

Answer: Option D

Solution:

When the battery is half (50%) charged, the specific gravity of acid in a battery is usually 1.19

68

The main task of a battery in automobiles is to

A) Supply electricity to the alternator B) Act as a reservoir or stabilizer of electricity C) Supply electricity to the vehicle's electrical system at all times while the engine is running D) Supply a large amount of power to turn the starter motor when the engine is being started

Discuss

Answer & Solution

Answer: Option D

Solution:

An automotive battery is a rechargeable battery that supplies electrical current to a motor vehicle.
Its main purpose is to feed the starter, which starts the engine.
Once the engine is running, power for the car's electrical systems is supplied by the alternator.

69

The function of a governor in automobiles is to

A) Limit the power B) Limit the vehicle speed C) Maintain constant engine speed D) Maximise the fuel economy

Discuss

Answer & Solution

Answer: Option B

Solution:

The function of a governor in automobiles is to limit fuel to the engine to a maximum safe speed when unloaded and to maintain a relatively constant speed despite changes in loading.

70

The basic purpose of tyre rotation on automobiles is to

A) Avoid ply separation B) Equalize wear C) Get better ride D) None of these

Discuss

Answer & Solution

Answer: Option B

Solution:

Tire rotation is the practice of moving the wheels and tires of an automobile from one position to another, to ensure even tire wear.
The weight on the front and rear axles differs which causes uneven wear.

Automobile Engineering MCQ Questions & Answers | Mechanical Engineering