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Engineering :: Mechanical Measurements

21.  The minimum change in the measured variable which produces an effective response of the instrument is known as
A. Resolution sensitivity B. Accuracy
C. Hysteresis D. Precision
E. Deviation    
22.  The larget range through which the measurable variable can change without the change being indicated by the indicator is known as
A. Probability error B. Time lag
C. Dead zone D. Threshold sensitivity
E. None of the above    
23.  Which of the following could be the source of random error in an instrument?
A. Friction in instrument movement B. Backlash
C. Mechanical vibrations D. Hysteresis in elastic members
E. Any of the above    
24.  Which of the following standard can be used for defining length?
A. Bar standard B. End standard
C. Light wave standard D. Any of the above
E. None of the above    
25.  Bolometers are used for measurement of
A. Thermal radiations B. Electromagnetic, radiations
C. Manetic hysteresis loop area D. Intensity of light
E. All of the above    
26.  The reliability of an instrument means
A. The maximum useful life of an instrument B. The service of an instrument between two repairs
C. The range in which the characteristics of an instrument remain linear D. The degree to which repeatability continues to remain within specified limits
E. None of the above    
27.  The sensitivity accuracy of an instrument depends on
A. Frequency response B. Amplitude distortion
C. Tempearature variations D. Hysteresis
E. None of the above    
28.  A degital thermometer has 3
A. 1.000?C B. 1.001?C
C. 1.999?C D. 0.999?C
E. None of the above    
29.  The accuracy of a 0 - 10 mV meter is
A. 9 mV B. 11 mV
C. Either 9 mV or 10 mV D. Either 9 mV or 11 mV
E. More than 11 mV    
30.  A 0 - 100?C thermometer has accuracy of + 2.5%. It accuracy while reading 50 mA will be
A. 1.25% B. -1.25%

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