Automobile Engineering
JKSSB Junior Engineer (Mechanical) · Metrology and Automobile Engineering · 28 practice questions with answers and explanations: 7 Easy, 21 Medium, 0 Hard.
Sample questions
Sample Easy question 1
The battery commonly used in a car is a:
- lead–acid battery
- dry cell
- nickel–metal hydride battery
- fuel cell
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Answer: A. It delivers a high current to the starter motor.
Sample Easy question 2
A radial tyre has plies that run:
- at 90° to the direction of travel
- parallel to the direction of travel
- at 45° and cross each other
- in the circumferential direction only
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Answer: A. A radial tyre gives a longer life and a lower rolling resistance.
Sample Easy question 3
The function of the radiator is to:
- heat the engine
- filter the oil
- cool the engine coolant by transferring heat to the air
- store fuel
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Answer: C. A fan helps when the car is moving slowly.
Sample Medium question 4
Detonation (knock) in a petrol engine can be reduced by:
- increasing the compression ratio
- advancing the ignition timing excessively
- using a fuel with a higher octane number
- using a fuel with a lower octane number
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Answer: C. A higher octane fuel resists auto-ignition.
Sample Medium question 5
Which engine component opens and closes the intake and exhaust valves?
- The flywheel
- The crankshaft
- The connecting rod
- The camshaft
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Answer: D. It is driven by the crankshaft at half its speed in a four-stroke engine.
Sample Medium question 6
The valve timing diagram of an engine shows the:
- fuel consumption
- opening and closing of the valves relative to the crank angle
- temperature of the coolant
- speed of the vehicle
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Answer: B. Valve overlap is one of its features.