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.Management Sciences
Category: Process Control and Instrumentation
Which of the following thermocouples is capable of measuring a temperature of -50°C ?
A. Platinum-platinum + rhodium
B. Chromel-Alumel
C. Iron-constantan
D. Copper-constantan
Paramagnetism method is not used for the composition determination of ______________ in gases?
A. Oxygen
B. Oxides of nitrogen
C. Carbon dioxide
D. Any of these
A magnetic flowmeter is_________________?
A. Based on the principle of Faraday’s law
B. Capable of measuring the flow rate of slurries and electrolytes
C. Based on the linear relationship between the fluid flow rate and the induced voltage
D. All A., B. and C.
Temperature measuring instruments are standardised mostly with _____________ points of pure substances?
A. Melting
B. Boiling
C. Both A. & B.
D. Neither A. nor B.
Which of the following filled system expansion thermometer has the capability to measure the lowest temperature ?
A. Mercury in glass thermometer
B. Mercury in steel thermometer
C. Alcohol in glass thermometer
D. Fused metal (Na or K) in steel thermometer
Flow rate of sludge is not measured by a/an_________________?
A. Orificemeter
B. Open weir
C. Kennison nozzle
D. Both B. & C.
For measuring the temperature of a red hot furnace, which is the most suitable instrument ?
A. Platinum resistance thermometer
B. Thermocouple
C. Optical pyrometer
D. Bimetallic thermometer
Small furnace draught is accurately measured by an inclined tube manometer, in which the manometric liquid used most commonly is __________________?
A. Water
B. Carbon tetrachloride
C. Paraffin
D. Ethylene glycol
Flow rate through an orifice is _____________ the pressure differential?
A. Proportional to
B. Inversely proportional to the square root of
C. Proportional to the square root of
D. Inversely proportional to the square of
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