Explore topic-wise MCQs in Automobile Engineering.

This section includes 30 Mcqs, each offering curated multiple-choice questions to sharpen your Automobile Engineering knowledge and support exam preparation. Choose a topic below to get started.

1.

The angle in degrees moved by the crankshaft of a four cylinder engine between firing impulses is _________

A. 90
B. 180
C. 360
D. 720
Answer» C. 360
Discussion
2.

The pressure in an engine cylinder is less than atmospheric pressure when the engine is performing which stroke?

A. Suction
B. Compression
C. Power
D. Exhaust
Answer» B. Compression
Discussion
3.

A single cylinder four stroke engine is rotating at 2000 rpm. The number of power strokes occuring in one minute is ________

A. 500
B. 1000
C. 2000
D. 4000
Answer» C. 2000
Discussion
4.

The fuel is injected into the cylinder in diesel engine when the piston is ____________

A. Exactly at TDC after compression stroke
B. Exactly at the BDC before compression stroke
C. Approaching TDC during compression stroke
D. Approaching TDC during exhaust stroke
Answer» D. Approaching TDC during exhaust stroke
Discussion
5.

In a diesel engine the temperature of gases under full load may be of the order of __________

A. 550-650 degree Celsius
B. 200-300 degree Celsius
C. 150-200 degree Celsius
D. 100 degree Celsius
Answer» B. 200-300 degree Celsius
Discussion
6.

In a diesel engine the pressure during combustion may increase to a range at _________

A. 10-15 atm
B. 15-20 atm
C. 20-30 atm
D. 55-75 atm
Answer» E.
Discussion
7.

In S.I engine the intake valve closes __________

A. At BDC
B. At TDC
C. 25 degree to 84 degree after BDC
D. 10 degree to 20 degree before TDC
Answer» D. 10 degree to 20 degree before TDC
Discussion
8.

In a four stroke S.I engine the exhaust valve usually opens ______

A. At BDC
B. 35 degree to 60 degree before BDC
C. 35 degree to 60 degree after BDC
D. 10 degree to 20 degree before BDC
Answer» C. 35 degree to 60 degree after BDC
Discussion
9.

In internal combustion engine the approximate percentage of the combustion heat that passes to the cylinder walls is _________

A. 5%
B. 10%
C. 30%
D. 60%
Answer» D. 60%
Discussion
10.

Ignition advance is expressed in terms of _________

A. Crank angle
B. Millimetres of piston travel before TDC
C. Time in milli seconds
D. All of the mentioned
Answer» E.
Discussion
11.

In four cylinder engines the ignition advance depends on _________

A. Quality of fuel
B. Engine speed
C. Cylinder dimensions
D. Quality of fuel and engine speed
Answer» E.
Discussion
12.

In case of four cylinder inline engine the number of firing strokes in one revolution of crank is _______

A. 1
B. 2
C. 3
D. 4
Answer» C. 3
Discussion
13.

In case of four cylinder opposed cylinder engines the firing order is ___________

A. 1-4-3-2
B. 1-3-4-2
C. 1-2-3-4
D. 1-2-4-3
Answer» B. 1-3-4-2
Discussion
14.

The firing order in case of four cylinder inline engines is usually ________

A. 1-2-4-3
B. 1-3-4-2
C. 1-4-3-2
D. Either 1-3-4-2 or 1-4-3-2
Answer» E.
Discussion
15.

In an automobile engine the temperature of the piston will be more at __________

A. The crown of the piston
B. The skirt of the piston
C. The piston walls
D. The piston rings
Answer» B. The skirt of the piston
Discussion
16.

IN_S.I_ENGINE_THE_INTAKE_VALVE_CLOSES?$

A. At BDC
B. At TDC
C. 25 degree to 84 degree after BDC
D. 10 degree to 20 degree before TDC
Answer» D. 10 degree to 20 degree before TDC
Discussion
17.

In a diesel engine the temperature of gases under full load may be of the order of$

A. 550-650 degree Celsius
B. 200-300 degree Celsius
C. 150-200 degree Celsius
D. 100 degree Celsius
Answer» B. 200-300 degree Celsius
Discussion
18.

In_a_diesel_engine_the_pressure_during_combustion_may_increase_to_a_range_at$

A. 10-15 atm
B. 15-20 atm
C. 20-30 atm
D. 55-75 atm
Answer» E.
Discussion
19.

The angle in degrees moved by the crankshaft of a four cylinder engine between firing impulses is

A. 90
B. 180
C. 360
D. 720
Answer» C. 360
Discussion
20.

The pressure in an engine cylinder is less than atmospheric pressure when the engine is performing which stroke

A. Suction
B. Compression
C. Power
D. Exhaust
Answer» B. Compression
Discussion
21.

A single cylinder four stroke engine is rotating at 2000 rpm. The number of power strokes occuring in one minute is

A. 500
B. 1000
C. 2000
D. 4000
Answer» C. 2000
Discussion
22.

The fuel is injected into the cylinder in diesel engine when the piston is

A. Exactly at TDC after compression stroke
B. Exactly at the BDC before compression stroke
C. Approaching TDC during compression stroke
D. Approaching TDC during exhaust stroke
Answer» D. Approaching TDC during exhaust stroke
Discussion
23.

In a four stroke S.I engine the exhaust valve usually open?

A. At BDC
B. 35 degree to 60 degree before BDC
C. 35 degree to 60 degree after BDC
D. 10 degree to 20 degree before BDC
Answer» C. 35 degree to 60 degree after BDC
Discussion
24.

In internal combustion engine the approximate percentage of the combustion heat that passes to the cylinder walls is

A. 5%
B. 10%
C. 30%
D. 60%
Answer» D. 60%
Discussion
25.

Ignition advance is expressed in terms of

A. Crank angle
B. Millimetres of piston travel before TDC
C. Time in milli seconds
D. All of the mentioned
Answer» E.
Discussion
26.

In four cylinder engines the ignition advance depends on

A. Quality of fuel
B. Engine speed
C. Cylinder dimensions
D. Quality of fuel and engine speed
Answer» E.
Discussion
27.

In case of four cylinder inline engine the number of firing strokes in one revolution of crank is

A. 1
B. 2
C. 3
D. 4
Answer» C. 3
Discussion
28.

In case of four cylinder opposed cylinder engines the firing order is

A. 1-4-3-2
B. 1-3-4-2
C. 1-2-3-4
D. 1-2-4-3
Answer» B. 1-3-4-2
Discussion
29.

The firing order in case of four cylinder inline engines is usually

A. 1-2-4-3
B. 1-3-4-2
C. 1-4-3-2
D. Either 1-3-4-2 or 1-4-3-2
Answer» E.
Discussion
30.

In an automobile engine the temperature of the piston will be more at
A. The crown of the piston
B. The skirt of the piston
C. The piston walls
D. The piston rings
Answer» B. The skirt of the piston
Discussion