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Which of the following statements are true about valve overlap ?
Statement 1 : Valve overlap helps in scavenging of exhaust gases.

Statement 2 : Valve overlap is the number of degrees of camshaft rotation during
both valves are open.

A) Both Statements are correct B) Both Statements are incorrect

C) Only Statement 1 is correct D) Only Statement 2 is correct

For increasing volumetric efficiency of an engine at higher speeds, which of the
following technologies are used ?

A) Variable Valve Timing B) Variable Ignition Timing
C) Valve Overlap D) Valve Lag

The period in which the injected diesel fuel remaining in the combustion chamber
after the injection stops, continues to burn is known as

A) Delay Period B) After Burning Period
C) Uncontrolled Burning Period D) Controlled Burning Period
helps to reduce the fluctuation of crankshaft speed during an engine cycle.
A) Vibration damper B) Balancer shaft
C) Flywheel D) Counter weights
Which of the following statement is correct ?

Statement 1 : For same compression ratio Otto cycle is more efficient than Diesel

cycle.

Statement 2 : For same compression ratio Diesel cycle is more efficient than Otto
cycle.

A) Both Statements are correct B) Both Statements are incorrect

C) Only Statement 1 is correct D) Only Statement 2 is correct

The ratio between Brake power and Indicated power is known as
A) Mechanical efficiency B) Brake thermal efficiency
C) Volumetric efficiency D) Indicated thermal efficiency

An engine having stroke equal to its bore is known as
A) Wankel engine B) Over square engine
C) Square engine D) Under square engine