Top 150+ Solved Dynamics of Machinery MCQ Questions Answer
Q. In FFT Spectrum Analyzer, the filter is used to ________.
a. reject unwanted signals
b. sets the level of the signals to be fed to the A/D converter
c. convert analog signals into digital signals
d. converts digital signals into analog signals
Q. FFT analyzer can be used to find the ___________.
a. natural frequencies
b. mode shapes
c. both natural frequencies and mode shapes
d. none of the above
Q. Fourier transform is a mathematical procedure to obtain the __________ of a given inputsignal.
a. spectrum
b. integration
c. difference
d. none of the above
Q. In FFT Spectrum Analyzer, FFT stands for _______.
a. Frequency Fourier Transform
b. Fast Fourier Transmission
c. Frequency Fourier Transmission
d. Fast Fourier Transform
Q. From the following, which one is used in an accelerometer?
a. Dielectric crystals
b. Piezoelectric crystals
c. Optic crystals
d. Diamond
Q. 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
Q. Which instrument is used to record building vibrations or vibrations of huge structures like railway bridges?
a. Stroboscope
b. Accelerometer
c. Vibrometer
d. None of the above
Q. Vibration measuring instruments are classified on the basis of ____________.
a. contact between the vibrating system and measuring instrument
b. the requirement of power source
c. method of measurements
d. all of the above
Q. From the following, which one is also known as low-frequency Transducer?
a. Stroboscope
b. Accelerometer
c. Vibrometer
d. None of the above
Q. From the following, which one is a type of vibration measuring instrument?
a. Mechanical
b. Electrical
c. Magnetic
d. All of the above
Q. An accelerometer is an instrument used to measure the _________ of a vibrating body.
a. displacement
b. velocity
c. acceleration
d. all of the above
Q. Stroboscope is used for the measurement of _________________?
a. Rpm of a flywheel
b. Frequency of light
c. Depression of freezing point
d. Liquid level under pressure
Q. A seismometer is a device used to measure the ___________ of a vibrating body.
a. displacement
b. velocity
c. acceleration
d. all of the above
Q. The instruments which are used to measure the ___________ of a vibrating body arecalled vibration measuring instrument.
a. displacement
b. velocity
c. acceleration
d. all of the above
Q. The accelerometer is used as a transducer to measure earthquake in Richter scale. Itsdesign 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