MCQs of Forced damped vibrations (Dynamics of Machinery - 3151911)

Showing 31 to 40 out of 45 Questions

31.

In an accelerometer, the spring used should be ______.

(a)	short
(b)	long
(c)	either short or long
(d)	size of spring does not effect

32.

The accelerometers are commonly used in vibration measurement due to their ___________.

(a)	small size and low sensitivity
(b)	the large size and high sensitivity
(c)	the large size and low sensitivity
(d)	small size and high sensitivity

33.

The accelerometer is used as a transducer to measure earthquake in Richter scale. Its design is based on the principle that ______.

(a)	its natural frequency is very low in comparison to the frequency of vibration
(b)	its natural frequency is very high in comparison to the frequency of vibration
(c)	its natural frequency is equal to the frequency of vibration
(d)	measurement of vibratory motion is without any reference point

34.

From the following, which one is used in an accelerometer?

35.

A seismometer is a device used to measure the ___________ of a vibrating body.

36.

In Fullarton Tachometer, a thin strip with a ______ is attached at one of its ends.

37.

Which mechanism is adjusted to change the length of the strip in a Fullarton tachometer?

38.

In FFT spectrum analyzer, FFT stands for _______.

(a)	Frequency Fourier Transform
(b)	Fast Fourier Transmission
(c)	Frequency Fourier Transmission
(d)	Fast Fourier Transform

39.

Fourier transform is a mathematical procedure to obtain the __________ of a given input signal.

40.

FFT analyzer can be used to find the ___________.

(a)	natural frequencies
(b)	mode shapes
(c)	both natural frequencies and mode shapes
(d)	acceleration

Showing 31 to 40 out of 45 Questions