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Engineering :: Mechanical Measurements

121.  A strobotron is
A. A tachogenerator B. A two winding dc generator
C. A hot cathode gaseous discharge tube D. A device for temperature measurement
E. None of the above    
122.  An accelerometer has a seismic mass of 0.05 kg and a spring constant of 3000 N/m. Maximum mass displacement is
A. 120 m/s2 B. 300 m/s2
C. 600 m/s2 D. 1200 m/s2
E. 2400 m/s2    
123.  In the above case the natural frequency be will
A. 13 Hz B. 26 Hz
C. 39 Hz D. 68 Hz
E. 91 Hz    
124.  A load cell is essentially a
A. Thermocouple B. Thermistor
C. Photoconductive device D. Strain gauge
E. Photo voltaic cell    
125.  A load cell cannot be used to measure
A. Weight B. Temperature
C. Level D. Pressure
E. All of the above    
126.  The degree of fementation in brewing pressure can be measured by
A. Conductivity meter B. pH meter
C. Bolometer D. Smoke meter
E. Turbidity meter    
127.  The advantage of piezoelectric crystal as transducer is
A. High frequency response B. High output
C. Negligible phase shift D. Small size
E. All of the above    
128.  Which of the following material is used for photoconductive cells
A. Selenium B. Mica
C. Thorium D. Tungsten
E. Barium sulphate    
129.  A piezoelectric crystal can be used to measure
A. Temperature B. Velocity
C. Acceleration D. Flow
E. All of the above    
130.  A piezometer is used to measure
A. Very low pressures B. Pressure differential
C. Atmospheric pressures D. High pressures
E. Pressures above and below atmospheric pressure    

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