A bolometer is
A. Used for the measurement of thermal radiation
B. An element which senses optical input and delivers thermal output
C. Both A & B
D. Neither A nor B
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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 of the above
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Which of the following is not a speed measuring instrument?
A. Psychrometer
B. Stroboscope
C. Tachometer
D. All of the above
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A stable system is the one
A. For which the output response is bounded for all bounded input
B. Which exhibits an unbounded response to a bounded input
C. Which satisfies the conditions for a servo problem
D. None of these
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Which of the following is the dynamic characteristics of an instrument?
A. Reproducibility
B. Sensitivity
C. Dead zone
D. Fidelity
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Radiation thermometer can not measure the temperature
A. Inside a pressure vessel
B. Of an object without coming in contact with it
C. Of liquid oxygen
D. Of moving objects at high temperature
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Liquid flow rate in a small channel is best measured by a/an
A. Weir
B. Pitot tube
C. Vane meter
D. Venturimeter
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High temperature of around 2000°C of incandescent gas mantles is measured by a/an
A. Specially designed thermocouple
B. Optical pyrometer
C. Radiation pyrometer
D. None of these
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Zirconia probe is used for the continuous measurment of __________ flue gases going out of the furnace.
A. Oxygen in
B. Carbon dioxide in
C. Carbon monoxide in
D. Temperature of
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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
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All the thermocouples used for temperature measurement use dissimilar metal
A. Strips
B. Bars
C. Wires
D. Beads
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Which of the following filled system expansion thermometers has the lowest positive temperature measurement capability?
A. Mercury in glass thermometer
B. Alcohol in glass thermometer
C. Fused metal (Na or K) in steel thermometer
D. Nitrogen in steel thermometer
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Thermal wells used in temperature measurements should have
A. Very thick walls
B. Low emissivity
C. Polished surface
D. High transmissivity of radiation
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Process degree of freedom indicates __________ number of controllers to be used.
A. The maximum
B. The minimum
C. Both maximum and the minimum
D. Nothing about the
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Bimetal strips are not used in
A. Bimetallic thermometers
B. Thermocouples
C. Thermostats
D. Relays for opening & closing of electrical circuits
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Bode diagram is a plot of
A. Log (AR) vs. log (f) and (Φ) vs. log (f)
B. Log (AR) vs. f and log Φ vs.f
C. AR vs. log (f) and Φ vs. log (f)
D. None of these
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Bourdon tube is never made of
A. Phosphor bronze
B. Monel metal
C. Stainless steel
D. Cast iron
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Specific conductance is defined as the reciprocal of resistance in ohms of 1 c.c. of liquid at a specified temperature. Its value for distilled water is about __________ micro mho/cm3 .
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Which of the following thermocouples is the most suitable for measuring a temperature of about 1600°C in an oxidizing atmosphere?
A. Platinum-platinum + rhodium
B. Iron-constantan
C. Copper-constantan
D. Chromel-alumel
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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
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