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.Management Sciences
Category: Process Control and Instrumentation
The unit step response of the transfer function 1/(s2 + 2s + 3) _______________________?
A. Has a non-zero slope at the origin
B. Has a damped oscillatory characteristics
C. Is overdamped
D. Is unstable
The term analogous to voltage in a single tank system is the_______________?
A. Heat content of the system
B. Liquid volume in the tank
C. Flow rate
D. Level of liquid
Working principle of mercury in glass thermometer is based on volumetric expansion of mercury with increase in temperature. Which of the following undergoes minimum volumetric expansion for a given temperature change ?
A. Water
B. Mercury
C. Methyl alcohol
D. Carbon-tetrachloride
The _____________ of a vapor pressure thermometer is a functioning element?
A. Pointer
B. Bourdon tube
C. Bulb
D. None of these
Which of the following temperature measuring instruments need not touch the object whose temperature is being measured ?
A. Radiation/infrared pyrometer
B. Filled system thermometer
C. Mercury in glass thermometer
D. Thermo electric pyrometer
Thermistors are used in ____________ devices?
A. Voltage measuring
B. Temperature measuring
C. Temperature compensating
D. Both B. & C.
Thermistors are made of__________________?
A. Ultra pure metals
B. Metal oxides
C. Iron-copper alloys
D. Nickel-chromium alloys
A constant volume gas thermometer employing ______________ is used to measure sub-zero (i.e., < 0°C) temperature?
A. Helium
B. Hydrogen
C. Nitrogen
D. None of these
Accurate temperature measurement performance of a radiation pyrometer cannot be affected, if the ?
A. Enhancement or attenuation of radiation occurs in the sighting path
B. Object and surrounding are at almost the same temperature
C. Object has varying emissivity
D. Object is transparent
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