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511.

An oscillatory motion of mechanical system is called:

A.	Noise	B.	Vibration
C.	Both (a) & (b)	D.	None of these

512.

Vibration is measured by:

A.	Accelerometer	B.	Tachometer
C.	Tensiometer	D.	None of these

513.

It six-cylinder engine rated at 2200 rpm will generate a fundamental sound frequency of:

A.	150 Hz	B.	220 Hz
C.	250 Hz	D.	None of these

514.

A spring mass damper system vibrates with:

A.	5 degree of freedom	B.	6 degree of freedom
C.	7 degree of freedom	D.	8 degree of freedom

515.

Tractor seat suspension should have its natural frequency of:

A.	0.5 to 1.5 cycles per second	B.	0.5 to 2.0 cycles per second
C.	1 to 2.5 cycles per second	D.	All are correct

516.

Ratio of output vibration to input vibration is called:

A.	Vibration intensity	B.	Transmissibility
C.	Both (a) & (b)	D.	None of these

517.

Range of transmissibility for satisfactory performance is:

A.	0.5 to 0.65	B.	0.5 to 0.75
C.	0.5 to 1.0	D.	None of these

518.

In proper seat suspension design, the transmissibility should be:

A.	Less than unity	B.	More than unity
C.	Less than 2	D.	More than 2

519.

In general tractor, frequency should be:

A.	3.10 Hz	B.	3.12 Hz
C.	5.15 Hz	D.	5.20 Hz

520.

The un-damped natural frequency of seat suspension system with mzximum travel of 76 mm should be:

A.	1.0 Hz	B.	1.5 Hz
C.	2.0 Hz	D.	1.5 Hz