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.Management Sciences
Category: Process Control and Instrumentation
Which of the following controllers has maximum offset ?
0
A. P-controller
B. P-I controller
C. P-D controller
D. P-I-D controller
Which of the following thermocouples can measure the maximum temperature ?
A. Platinum-rhodium
B. Tungsten-molybdenum
C. Chromel-alumel
D. Iron-constantan
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.
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