Automobile Engineering

Question: If clearance volume of I.C. engines is increased, the compression ratio will
[A].

increase

[B].

decrease

[C].

remain constant

[D].

be doubled

Answer: Option B

Explanation:

No answer description available for this question.

Question: An engine has a clearance volume of 100 cm3 and a swept volume of 800 cm3. The compression ratio is
[A].

7:1

[B].

8:1

[C].

9:1

[D].

10:1

Answer: Option C

Explanation:

No answer description available for this question.

Question: A four-cylinder engine has a capacity of 2.4 litres. The swept volume of one cylinder is
[A].

400 cm3

[B].

600 cm3

[C].

1200 cm3

[D].

2400 cm3

Answer: Option B

Explanation:

No answer description available for this question.

Question: A basic difference between the spark ignition engine and the Diesel engine is that the
[A].

Diesel engine compresses air alone instead of an air-fuel mixture

[B].

air temperature ignites the fuel in the Diesel engine

[C].

fuel is sprayed into the combustion chamber in the Diesel engine as the piston nears T.D.C. on the compression stroke

[D].

all of the above

Answer: Option D

Explanation:

No answer description available for this question.

Question: For the same maximum pressure and temperature
[A].

Diesel cycle is more efficient than Otto cycle

[B].

Otto cycle is more efficient than Diesel cycle

[C].

both Otto cycle and Diesel cycle are equally efficient

[D].

none of the above

Answer: Option A

Explanation:

No answer description available for this question.

Question: In a square type engine
[A].

geometrical shape is square

[B].

diameter and length of piston are same

[C].

two cylinders are placed horizontal and two vertical

[D].

stroke length and cylinder bore are same

Answer: Option D

Explanation:

No answer description available for this question.

Question: The air resistance to a car at 20 kmph is R. The air resistance at 40 kmph will be
[A].

R

[B].

2 R

[C].

4R

[D].

4 R2

Answer: Option C

Explanation:

No answer description available for this question.

Question: A petrol engine of a car develops 125 N-m torque at 2700 r.p.m. The car is driven in second gear having gear ratio of 1.75. The final drive ratio is 4.11. If the overall transmission efficiency is 90%, then the torque available at the driving wheels is
[A].

8.091 N-m

[B].

80.91 N-m

[C].

809.1 N-m

[D].

8091 N-m

Answer: Option C

Explanation:

No answer description available for this question.

Question: In comparison to frame type construction, the frameless structure construction of automobiles is economical when produced in __________ numbers.
[A].

small

[B].

large

Answer: Option B

Explanation:

No answer description available for this question.

Question: In a unit type body (frameless body) design, the sheet metal parts are welded together, forming a frame work to which outer skin is attached.
[A].

True

[B].

False

Answer: Option A

Explanation:

No answer description available for this question.