Performance and Testing of Engines MCQ Questions & Answers

1.
The percentage of the energy in the petrol burnt in the engine which is actually utilized in propelling the car is as little as

A. 25%

B. 60%

C. 35%

D. 15%

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2.
Mechanical efficiency of an automobile engine usually varies in the range:

A. 50% - 60%

B. 60% - 70%

C. 70% - 90%

D. More than 90%

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3.
The thermal efficiency of an air standard diesel cycle having fixed compression ratio, with increase in cut-off will:

A. Increase

B. Decrease

C. Independent

D. None of the above

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4.
How many times in a minute does each valve on a 4-stroke engine running at 2000 rpm open and close?

A. 1000

B. 2000

C. 4000

D. 6000

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5.
If the fuel consumption of 4-stroke IC engine is 0.1 kg/min and calorific value of fuel used is 40,000 kJ/kg, then the amount of energy supplied per minute is . . . . . . . .

A. 66.67 kJ

B. 666.7 kJ

C. 4,000 kJ

D. 400 kJ

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6.
Which of the following is under performance test?

A. Preliminary tests

B. Air resistance

C. Maximum speed

D. All are correct

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7.
A Laboratory test bed consists of-

A. A dynamometer

B. An adjustable engine stand or cradle

C. Both are correct

D. None of these

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8.
The tractive effort of an automobile is the force required to move the

A. Flywheel

B. Gears

C. Driving wheels

D. None of these

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9.
In a four stroke engine, we get one power stroke in

A. 270° of crank rotation

B. 360° of crank rotation

C. 540° of crank rotation

D. 720° of crank rotation

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10.
Stalling of S. I. engine after high speed driving can be caused by

A. Vapour lock

B. Incorrect ignition timing

C. Malfunctioning of carburettor

D. Malfunctioning of spark plug

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Performance and Testing of Engines MCQ Questions & Answers | Automobile Engineering

1. The percentage of the energy in the petrol burnt in the engine which is actually utilized in propelling the car is as little as

Answer & Solution

2. Mechanical efficiency of an automobile engine usually varies in the range:

Answer & Solution

3. The thermal efficiency of an air standard diesel cycle having fixed compression ratio, with increase in cut-off will:

Answer & Solution

4. How many times in a minute does each valve on a 4-stroke engine running at 2000 rpm open and close?

Answer & Solution

5. If the fuel consumption of 4-stroke IC engine is 0.1 kg/min and calorific value of fuel used is 40,000 kJ/kg, then the amount of energy supplied per minute is . . . . . . . .

Answer & Solution

6. Which of the following is under performance test?

Answer & Solution

7. A Laboratory test bed consists of-

Answer & Solution

8. The tractive effort of an automobile is the force required to move the

Answer & Solution

9. In a four stroke engine, we get one power stroke in

Answer & Solution

10. Stalling of S. I. engine after high speed driving can be caused by

Answer & Solution

1.
The percentage of the energy in the petrol burnt in the engine which is actually utilized in propelling the car is as little as

2.
Mechanical efficiency of an automobile engine usually varies in the range:

3.
The thermal efficiency of an air standard diesel cycle having fixed compression ratio, with increase in cut-off will:

4.
How many times in a minute does each valve on a 4-stroke engine running at 2000 rpm open and close?

5.
If the fuel consumption of 4-stroke IC engine is 0.1 kg/min and calorific value of fuel used is 40,000 kJ/kg, then the amount of energy supplied per minute is . . . . . . . .

6.
Which of the following is under performance test?

7.
A Laboratory test bed consists of-

8.
The tractive effort of an automobile is the force required to move the

9.
In a four stroke engine, we get one power stroke in

10.
Stalling of S. I. engine after high speed driving can be caused by