Question 1

Main advantage of a two-stroke engine over four-stroke engine is

Accepted Answer

A) more uniform torque on the crankshaft 
B) more power output for the cylinder of same dimensions 
C) absence of valves 
D) all of the above 
A) more uniform torque on the crankshaft 
B) more power output for the cylinder of same dimensions 
C) absence of valves 
D) all of the above D

Question 2

The volumetric efficiency of the SI engine is comparatively

Accepted Answer

A) lower than CI engine 
B) higher than CI engine 
C) will be same as CI engine 
D) none of the above 
A) lower than CI engine 
B) higher than CI engine 
C) will be same as CI engine 
D) none of the above A

Question 3

Engines used for ships are normally

Accepted Answer

A) four-stroke Sl engines of very high power 
B) two-stroke CI engines of very high power 
C) four-stroke Cl engines of high speed 
D) two-stroke SI engines of high power 
A) four-stroke Sl engines of very high power 
B) two-stroke CI engines of very high power 
C) four-stroke Cl engines of high speed 
D) two-stroke SI engines of high power B

Question 4

A two-stroke engine can be identified by

Accepted Answer

A) cooling system 
B) lubrication system 
C) absence of valves 
D) piston size 
A) cooling system 
B) lubrication system 
C) absence of valves 
D) piston size

Question 5

Engines of different cylinder dimensions, power and speed can be compared on the basis of

Accepted Answer

A) Maximum pressure 
B) Fuel consumption 
C) mean effective pressure 
D) unit power 
A) Maximum pressure 
B) Fuel consumption 
C) mean effective pressure 
D) unit power

Question 6

Two wheelers without deflector type piston use

Accepted Answer

A) loop scavenging 
B) unifow scavenging 
C) reverse flow scavenging 
D) cross scavenging 
A) loop scavenging 
B) unifow scavenging 
C) reverse flow scavenging 
D) cross scavenging

Question 7

If L is the stroke and N is the rpm, mean piston speed of two-stroke engine

Accepted Answer

A) LN 
B) LN/2 
C) 2LN 
D) none of the above 
A) LN 
B) LN/2 
C) 2LN 
D) none of the above

Question 8

Advantage of reciprocating IC engines over steam turbine is

Accepted Answer

A) Mechanical simplicity 
B) Improved plant efficiency 
C) Lower average temperature 
D) all of the above 
A) Mechanical simplicity 
B) Improved plant efficiency 
C) Lower average temperature 
D) all of the above

Question 9

In a four-stroke IC engine cam shaft rotates at

Accepted Answer

A) same speed as crankshaft 
B) twice the speed of crankshaft 
C) halt the speed of crankshaft 
D) none of the above 
A) same speed as crankshaft 
B) twice the speed of crankshaft 
C) halt the speed of crankshaft 
D) none of the above

Question 10

The working cycle in case of four stroke engine is completed in following number of revolutions of crankshaft

Accepted Answer

A) 1/2 
B) 1 
C) 2 
D) 4 
A) 1/2 
B) 1 
C) 2 
D) 4

Question 11

In a diesel engine, the fuel is ignited by

Accepted Answer

A) spark 
B) injected fuel 
C) heat resulting from compressing air that is supplied for combustion 
D) ignitor 
A) spark 
B) injected fuel 
C) heat resulting from compressing air that is supplied for combustion 
D) ignitor

Question 12

The most perfect method of scavenging is

Accepted Answer

A) cross scavenging 
B) uniflow scavenging 
C) loop scavenging 
D) reverse flow scavenging 
A) cross scavenging 
B) uniflow scavenging 
C) loop scavenging 
D) reverse flow scavenging

Question 13

SI engines are of

Accepted Answer

A) light weight 
B) high speed 
C) homogeneous change of fuel and oil 
D) all of the above 
A) light weight 
B) high speed 
C) homogeneous change of fuel and oil 
D) all of the above

Question 14

Engine can be fired with

Accepted Answer

A) solid fuel 
B) liquid fuel 
C) gaseous fuel 
D) any of the above fuels 
A) solid fuel 
B) liquid fuel 
C) gaseous fuel 
D) any of the above fuels

Question 15

Compression ratio in diesel engines is of the order of

Accepted Answer

A) 5-7 
B) 7 -10 
C) 10 - 12 
D) 14-20 
A) 5-7 
B) 7 -10 
C) 10 - 12 
D) 14-20

Question 16

Gudgeon pin forms the link between

Accepted Answer

A) piston and big end of connecting rod 
B) piston and small end of connecting rod 
C) connecting rod and crank 
D) big end and small end 
A) piston and big end of connecting rod 
B) piston and small end of connecting rod 
C) connecting rod and crank 
D) big end and small end

Question 17

Disadvantages of reciprocating IC engine are

Accepted Answer

A) vibration 
B) use of fossil fuels 
C) balancing problems 
D) all of the above 
A) vibration 
B) use of fossil fuels 
C) balancing problems 
D) all of the above

Question 18

Advantage of two-stroke engine is

Accepted Answer

A) more uniform torque 
B) lighter flywheel 
C) no valves 
D) all of the above 
A) more uniform torque 
B) lighter flywheel 
C) no valves 
D) all of the above

Question 19

Crankcase scavenged engines have delivery ratio of

Accepted Answer

A) greater than 1 
B) less than 1 
C) equal to 1 
D) none of the above 
A) greater than 1 
B) less than 1 
C) equal to 1 
D) none of the above

Question 20

Two-stroke SI engines suffer from

Accepted Answer

A) fuel loss 
B) idling difficulty 
C) both (a) and (b) together 
D) none of the above 
A) fuel loss 
B) idling difficulty 
C) both (a) and (b) together 
D) none of the above

Main advantage of a two-stroke engine over four-stroke engine is

The volumetric efficiency of the SI engine is comparatively

Engines used for ships are normally

A two-stroke engine can be identified by

Engines of different cylinder dimensions, power and speed can be compared on the basis of

Two wheelers without deflector type piston use

If L is the stroke and N is the rpm, mean piston speed of two-stroke engine

Advantage of reciprocating IC engines over steam turbine is

In a four-stroke IC engine cam shaft rotates at

The working cycle in case of four stroke engine is completed in following number of revolutions of crankshaft

In a diesel engine, the fuel is ignited by

The most perfect method of scavenging is

SI engines are of

Engine can be fired with

Compression ratio in diesel engines is of the order of

Gudgeon pin forms the link between

Disadvantages of reciprocating IC engine are

Advantage of two-stroke engine is

Crankcase scavenged engines have delivery ratio of

Two-stroke SI engines suffer from

Diesel Engines and Thermodynamic Cycles

Combustion and Efficiency in Engines

Fuel and Hydrocarbon

Automobile Engine Fuel Systems

Fuel Injection and Ignition Systems in Automotive Engineering

Supercharging and Ignition Timing in Engines

Combustion and Engine Performance in IC Engines

Automotive Engine Lubrication and Cooling System

Engine Cooling, Efficiency, and Emissions

Exhaust Emissions and Control Systems in Vehicles

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Exam 1: Internal Combustion Engines and Their Advantages and Disadvantages

Main advantage of a two-stroke engine over four-stroke engine is

The volumetric efficiency of the SI engine is comparatively

Engines used for ships are normally

A two-stroke engine can be identified by

Engines of different cylinder dimensions, power and speed can be compared on the basis of

Two wheelers without deflector type piston use

If L is the stroke and N is the rpm, mean piston speed of two-stroke engine

Advantage of reciprocating IC engines over steam turbine is

In a four-stroke IC engine cam shaft rotates at

The working cycle in case of four stroke engine is completed in following number of revolutions of crankshaft

In a diesel engine, the fuel is ignited by

The most perfect method of scavenging is

SI engines are of

Engine can be fired with

Compression ratio in diesel engines is of the order of

Gudgeon pin forms the link between

Disadvantages of reciprocating IC engine are

Advantage of two-stroke engine is

Crankcase scavenged engines have delivery ratio of

Two-stroke SI engines suffer from

Diesel Engines and Thermodynamic Cycles

Combustion and Efficiency in Engines

Fuel and Hydrocarbon

Automobile Engine Fuel Systems

Fuel Injection and Ignition Systems in Automotive Engineering

Supercharging and Ignition Timing in Engines

Combustion and Engine Performance in IC Engines

Automotive Engine Lubrication and Cooling System

Engine Cooling, Efficiency, and Emissions

Exhaust Emissions and Control Systems in Vehicles

Filters