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Process Instrumentation and Control - Interview Questions and Answers

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71. In which flow device the pressure loss is minimum :
A. orifice plate
B. nozzle
C. variable orifice meter
D. venturi tube
E. Dall tube.
Explanation:
72. Laser droppler anemometer is used to measure :
A. pressure
B. velocity
C. level
D. density
E. temperature.
Explanation:
73. The material used for resistance temperature sensor is :
A. copper
B. nickel
C. platinum
D. any one of above
E. none of above.
Explanation:
74. 15� taper venturi tube causes loss of following % of the differential pressure :
A. 5%
B. 10%
C. 20%
D. 30%
E. 40%.
Explanation:
75. For an orfice plate having ratio of inside and pipe diameter as 0.5, the pressure loss in comparison to differential pressure created is of the order of :
A. 5%
B. 10%
C. 20%
D. 35%
E. 50%.
Explanation:
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