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.Management Sciences
Category: Process Control and Instrumentation
An aneroid barometer measures the _____________ pressure?
A. Atmospheric
B. Absolute
C. Vacuum
D. Gage
Dome temperature of blast furnace stove is most accurately measured by a____________________?
A. Radiation pyrometer
B. platinum-platinum/rhodium thermocouple
C. Iron-constantan thermocouple
D. Platinum resistance thermometer
Nitrogen gas constant volume thermometer is suitable for measuring a temperature of _____________ °C?
A. 0-100
B. < 0
C. > 100
D. > 50
______________ is undesirable in thermocouples used in industries ?
A. Linear relation of emf to temperature
B. Corrosion resistance
C. Oxidation resistance
D. Non-linear relation of emf to temperature
Thermal wells are used in the temperature measurement to____________________?
A. Guard against corrosive and oxidising action on thermocouple materials
B. Reduce measuring lag
C. Increase the fidelity
D. Increase the sensitivity
The unit of ‘time constant’ of a system is the same as that of___________________?
A. Velocity
B. Time
C. (Time)-1
D. None of these
Which of the following does not figure in the list of seven substances selected for international temperature scale ?
A. Ice (F.P) and steam (B.P)
B. Oxygen and sulphur (B.P)
C. Antimony and silver (F.P)
D. Zinc (B.P) and mercury (F.P)
The amplitude ratio for the sinusoidal response of a _____________ is 1?
A. First order system
B. Second order system
C. Transportation lag
D. None of these
Liquid flow rate in an open channel cannot be measured by a/an __________________?
A. Orifice meter
B. Cipolletti weir
C. Rectangular weir
D. V-notch
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