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- 1. Multiple Choice
A 150 cc engine has following parameter as 150 cc
fuel tank capacity
swept volume
cylinder volume
clearance volume.
- 2. Multiple Choice
Compression ratio of LC. engines is
The ratio of volumes of air in cylinder before compression stroke and after compression stroke
volume displaced by piston per stroke and clearance volume in cylinder
ratio of pressure after compression and before compression
swept volume/cylinder volume
- 3. Multiple Choice
The operation of forcing additional air under pressure in the engine cylinder is known as
Scavenging
Turbulence
Supercharging
Pre-ignition
- 4. Multiple Choice
The working cycle in case of four stroke engine is completed in following number of revolutions of crankshaft
1/2 (i.e. 0.5)
1
2
4
- 5. Multiple Choice
In a four stroke engine each cylinder has
One valve
Two valves
Four valves
Three valves
- 6. Multiple Choice
Pick up the wrong statement
In 4-stroke engine, a power stroke is obtained in 4-strokes
Thermal efficiency of 4-stroke engine is more due to positive scavenging
Petrol engines occupy more space than diesel engines for same power output.
Petrol engines work on otto cycle
- 7. Multiple Choice
Which of the following is not an interns combustion engine
2-stroke petrol engine
4-stroke petrol engine
diesel engine
steam turbine
- 8. Multiple Choice
The term scavenging is generally associated with
2-stroke cycle engines
4-stroke cycle engines
aeroplane engines
6-stroke cycle engines
- 9. Multiple Choice
In four stroke engines the inlet valve opens, when piston at
At TDC
At BDC
- 10. Multiple Choice
The purpose of valve clearance is to
Allow the sliding of valve in the guide
Ensure that the crankshaft is free to rotate
Allow the valve to expand
Ensure that the valve closes fully
- 11. Multiple Choice
The inlet value of a four stroke cycle I.C engine remains open for nearly
When piston moves from TDC to BDC during suction stroke
When piston moves from TDC to BDC during expansion stroke
When piston moves from BDC to TDC during compression stroke
When piston moves from BDC to TDC during exhaust stroke
- 12. Multiple Choice
In four stroke engines the exhaust valve opens, when piston at
At TDC
At BDC
- 13. Multiple Choice
Supercharging is the process of
Supplying the intake of an engine with air at a density greater than the density of the surrounding atmosphere
Providing forced cooling air
Injecting excess fuel for raising more loads
Supplying compressed air to remove combustion products fully
- 14. Multiple Choice
The reason for supercharging in any engine is to
increase efficiency
increase power
reduce weight and bulk for a given out-put
effect fuel economy
All the above
- 15. Multiple Choice
Two stroke engine has ….. ports
2
3
4
2 or 4
- 16. Multiple Choice
A petrol engine, during suction stroke draws
air only
petrol only
a mixture of petrol and air
none of the mentioned
- 17. Multiple Choice
With engines working on Otto cycle, a part of the mixture is lost as it escapes through the exhaust port during scavenging.
True
False
- 18. Multiple Choice
With heavy loads, two stroke engines get heated due to excessive heat produced.
True
False
- 19. Multiple Choice
In a diesel engine,the fuel is injected by.......
Spark plug
fuel pump
Ignitor
Injector
- 20. Multiple Choice
Which of the following medium is compressed in diesel engine cylinder
Air alone
Air and petrol
Fuel alone
Air and lubrication oil
- 21. Multiple Choice
What is full form of SI
Simple Ignition
Standard idling
Spark ignition
Solo identification
- 22. Multiple Choice
What direction is the piston traveling during the Power-Stroke?
Up
Down
Left
Right
- 23. Multiple Choice
The length the piston moves from top to bottom or bottom to top is calledStrokeBoreMovementLenght - 24. Multiple ChoiceHow many degrees of rotation does the crankshaft rotate to complete all the 4 stroke engine cycle.180360540720
- 25. Multiple Choice
What position are the valves in during the intake stroke
Intake Closed, Exhaust Closed
Intake Open, Exhaust Open
Intake Open, Exhaust Closed
I have no idea
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