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.Management Sciences
Category: Process Control and Instrumentation
Strain gage uses an electrical conductor wire, which when elastically stretched increases in length and reduces in diameter. Both these dimensional changes result in ____________ in the electrical resistance of the wire ?
0
A. No change
B. Decrease
C. Increase
D. Exponential decrease
Bode diagram are generated from output response of the system subjected to which of the following input ?
A. Impulse
B. Step
C. Ramp
D. Sinusoidal
Smoke density of the flue gas going out of the chimney is measured by a __________________?
A. Polarograph
B. Thermal conductivity meter
C. Photo electric cell
D. Chromatograph
Out of the following temperature measuring instruments, the measurement accuracy will be minimum for the ________________?
A. Mercury in glass thermometer
B. Optical pyrometer
C. Iron-constantan thermocouple
D. Alcohol filled thermometer
Thermal conductivity measurement is used for the determination of________________?
A. O2 percentage in the flue gas
B. Specific gravity of petrofuels
C. Composition of an alloy
D. CO2 percentage in the flue gas
Phase lag of the sinusoidal response of a first order system is _________________?
A. 120°
B. 30°
C. 180°
D. 90°
When the damping co-efficient (ξ) is unity, the system is __________________?
A. Overdamped
B. Critically damped
C. Underdamped
D. Highly fluctuating
A bimetallic thermometer as compared to industrial mercury in glass thermometer has almost the same_________________?
A. Temperature measuring range (- 40°C to 450°C)
B. Accuracy (± 1% of span)
C. Speed of response
D. All a, b & c
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