Search
.Management Sciences
Category: Process Control and Instrumentation
Which of the following thermocouple materials does not contain nickel ?
A. Alumel
B. Chromel
C. Constantan
D. None of these
In a second order under damped system, the_________________?
A. Time required for the response of first reach its ultimate value is called the response time
B. Overshoot (which is a measure of how much the response exceeds the ultimate value) increase
with the decrease of damping co-efficient
C. Decay ratio (which is the ratio of the sizes of successive peaks) is equal to the reciprocal of
overshoot
D. None of these
Which of the following is a ‘contact’ pyrometer ?
A. Resistance pyrometer
B. Optical pyrometer
C. Radiation pyrometer
D. Infra red pyrometer
The term analogous to the electrical current in a thermal system is the_________________?
A. Temperature difference
B. Heat flow rate
C. Heat content in the system
D. None of these
The transfer function for a P-D controller is________________?
A. Kc(1+ηD s)
B. Kc(1 +1/ηD s)
C. Kc ηD s
D. Kc/ηD s
Mcleod gauge measures the _____________ pressure?
A. Positive
B. Sub-atmospheric
C. Very high
D. Atmospheric
Water is entering a storage tank at a temperature T0 and flow rate Q0 and leaving at a flow rate Q and temperature T. There are negligible heat losses in the tank. The area of cross-section of the tank is A0. The model that describes the dynamic variation of temperature of water in the tank with time is given as________________?
A. Q0(T0 – T) = Ac . h (dT/dt)
B. Q0T0 – QT = Ac . h (dT/dt)
C. Q(T0 – T) = Ac . h (dT/dt)
D. Q(T0 – T) = Ac . (dTH/dt)
A photo electric device in which the resistance of the metal is directly proportional to the light striking on it, is known as photo-conductive cell. Photoelectric transducers are used for the measurement of those parameters, which can be used to produce variation in_______________?
A. Light intensity
B. Current
C. Flux density
D. Voltage
Bode stability method uses ____________ loop transfer function?
A. Open
B. Closed
C. Either A. or B.
D. Neither A. nor B.
The transfer function of a second order system is _____________________?
A. 1/(T2s2 + 2ξTs + 1)
B. 1/(T2s2 + 2Ts + 1)
C. 1/(T2s2 + 2ξT + 1)
D. None of these
Recent Comments