Automobile Engineering - Study Mode

[#146] Highest useful compression ratio (HUCR) is the highest compression ratio at which the
Correct Answer

(D) Fuel can be used in a test engine without knocking

Explanation

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

[#147] When the battery is half (50%) charged, the specific gravity of acid in a battery is usually
Correct Answer

(D) 1.19

Explanation

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

[#148] The main task of a battery in automobiles is to
Correct Answer

(D) Supply a large amount of power to turn the starter motor when the engine is being started

Explanation

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.

[#149] The function of a governor in automobiles is to
Correct Answer

(B) Limit the vehicle speed

Explanation

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.

[#150] The basic purpose of tyre rotation on automobiles is to
Correct Answer

(B) Equalize wear

Explanation

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.