Automobile Engineering Quiz | Automobile Engineering Multiple Choice Questions(MCQs) & Answers

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Questions
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

Answer: Increases
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

Answer: 30 Kg/cm2
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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

Answer: Inertia
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

Answer: 30 m kg of work
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

Answer: 10-30 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

Answer: 17 to 21:1
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

Answer: 7.5 to 8.5:1
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

Answer: Cylinder walls
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
A 1
B 2
C 3
D 4

Answer: 3
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

Answer: Diesel 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

Answer: Viscous friction
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