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Free download in PDF Automobile Engineering Multiple Choice Questions(MCQs) & Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
(1)
As the number of cylinders in multi cylinder engines increases the power to weight ratio ………
[A]
Remains the same
[B]
Increases
[C]
Becomes zero
[D]
Decreases
(2)
The maximum pressure of air at the end of compression in diesel engines is about
[A]
10 Kg/cm2
[B]
100 Kg/cm2
[C]
300 Kg/cm2
[D]
30 Kg/cm2
(3)
The characteristic of an object which makes it resist any tendency to change its direction of motion is called
[A]
Inertia
[B]
Power
[C]
Internal energy
[D]
None
(4)
When we lift a 10 kg weight, 3 metre we would be doing
[A]
300 m kg of work
[B]
3 m kg of work
[C]
30 m kg of work
[D]
None
(5)
The maximum pressure of air fuel mixture at the end of compression in petrol engines varies from
[A]
100-1000 Kg/cm2
[B]
10-30 Kg/cm2
[C]
30-100 Kg/cm2
[D]
6-10 Kg/cm2
(6)
Engine torque is highest at
[A]
Low speed
[B]
Intermediate speed
[C]
High speed
[D]
None
Answer: Intermediate speed
(7)
One of the major causes of FHP in an engine is
[A]
High speed
[B]
High volumetric efficiency
[C]
Piston-ring friction
[D]
None
Answer: Piston-ring friction
(8)
For diesel engines the nominal compression ratio is from
[A]
17 to 21:1
[B]
7.5 to 8.5:1
[C]
30 to 40:1
[D]
1 to 5:1
(9)
For petrol engines the nominal compression ratio will vary between
[A]
1 to 2:1
[B]
18 to 21:1
[C]
7.5 to 8.5:1
[D]
1 to 5:1
(10)
Connecting rods are generally of the following from
[A]
Forged I section steel
[B]
Forged round section steel
[C]
Cast steel triangular section
[D]
Forged square section steel
Answer: Forged I section steel
(11)
The temperature of the piston will be more at
[A]
The piston walls
[B]
The crown of the piston
[C]
The skirt of the piston
[D]
The piston pin
Answer: The crown of the piston
(12)
The two-stroke engine has valve ports in the
[A]
Cylinder walls
[B]
Pistons
[C]
Piston rings
[D]
None
(13)
The crankcase scavenging the the crankcase or underside of the piston acts as
[A]
An air compressor
[B]
A blower
[C]
A ventilator
[D]
A breather
Answer: An air compressor
(14)
The fuel injected when pressure in the cylinder reaches the point ……….. on the curve
(15)
The heat is added in the cycle at
[A]
Constant pressure
[B]
Constant volume
[C]
Approximately constant pressure and constant volume
[D]
None
Answer: Approximately constant pressure and constant volume
(16)
During compression stroke the air is compressed according to
[A]
Isothermal process
[B]
Hyperbolic process
[C]
Adiabatic process
[D]
Constant pressure process
Answer: Adiabatic process
(17)
During suction stroke the pressure inside the cylinder is
[A]
Equal to atmospheric pressure
[B]
Above atmospheric pressure
[C]
Above or below atmospheric pressure
[D]
Below atmospheric pressure
Answer: Below atmospheric pressure
(18)
The type of air cycle used in diesel engine is called
[A]
Otto cycle
[B]
Carnot cycle
[C]
Diesel cycle
[D]
Rankine cycle
(19)
In commercial vehicle layouts engine is located forward, rear or under floor mainly to
[A]
Better utilization of space
[B]
Increase fuel economy
[C]
Better weight distribution
[D]
Reduce the weight of chassis
Answer: Better weight distribution
(20)
The type of friction generally present in an automotive engine is
[A]
Viscous friction
[B]
Greasy friction
[C]
Dry friction
[D]
None
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