Q.1
Thermistor, which has high temperature co-efficient of resistivity, is used as the sensing element in resistance thermometer. It is a/an
Q.2
Pick out the first order system from among the following.
Q.3
Non-metallic diaphragm used as pressure sensor in instruments is generally made of
Q.4
__________ thermometer can not measure sub-zero (< 0° C) temperature,
Q.5
Which of the following can not measure a temperature of 1600°C ?
Q.6
Which of the following thermocouples can measure the maximum temperature?
Q.7
A barometer measures the __________ pressure.
Q.8
A mercury barometer measures the __________ pressure.
Q.9
Bode diagram are generated from output response of the system subjected to which of the following input?
Q.10
Working principle of mercury in glass thermometer is based on the __________ of mercury with increase in temperature.
Q.11
Find the ultimate gain and frequency for a proportional controller in the case of a process having the transfer function Gp(s) = 1/(4s + 1)(2s + 1)(s + 1).
Q.12
Temperature measurement range of iron-constantan thermocouple is 0 to 870°C. It can be used to measure sub zero temperature, because at lower temperature
Q.13
A proportional controller with a gain of Kc is used to control a first order process. The offset will increase, if
Q.14
Radiation thermometer can not measure the temperature
Q.15
Liquid flow rate in a small channel is best measured by a/an
Q.16
High temperature of around 2000°C of incandescent gas mantles is measured by a/an
Q.17
Zirconia probe is used for the continuous measurment of __________ flue gases going out of the furnace.
Q.18
Which of the following filled system expansion thermometer has the capability to measure the lowest temperature?
Q.19
A bolometer is
Q.20
A magnetic flowmeter is
Q.21
Temperature measurement by optical pyrometer is done above __________ point, which is 1063°C.
Q.22
Temperature measuring instruments are standardised mostly with __________ points of pure substances.
Q.23
Flow rate through an orifice is __________ the pressure differential.
Q.24
A control system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at the crossover frequency. This is __________ criterion.
Q.25
In a single tank system, the transfer function of __________ to inlet flow rate is 1/TS+1.
Q.26
Which of the following is not a speed measuring instrument?
Q.27
A stable system is the one
Q.28
Which of the following is the dynamic characteristics of an instrument?
Q.29
Dead zone in an instrument must be less than __________ percent of the scale.
Q.30
A non-linear system will have __________ steady state values.
Q.31
Nitrogen gas constant volume thermometer is suitable for measuring a temperature of __________ °C.
Q.32
Which of the following instruments is not used for measuring sub-zero (<0°) temperatures?
Q.33
Bode stability method uses __________ loop transfer function.
Q.34
Characteristic equation is the denominator of __________ loop transfer function.
Q.35
Which of the systems having following transfer functions is stable?
Q.36
For an input forcing function, X(t) = 2t², the Laplace transform of this function is
Q.37
The second order system with the transfer function 4/(S² + 2S + 4) has a damping ratio of
Q.38
Liquid argon level in a pressurised storage tank (at 3 kg/cm² ) is measured by a/an
Q.39
Thermodynamic celcius scale of temperature measurement is
Q.40
Resistance of a gas in a vessel is given by (where, P = pressure, V = volume of the vessel, n = no. of moles of the gas, R = gas constant)
Q.41
Strain gage pressure transducers are used to measure __________ pressures.
Q.42
Pressure of 0.0001 absolute psi can be measured by __________ gauge.
Q.43
Helium gas constant volume thermometer is suitable for the measurement of a temperature of __________ °C.
Q.44
The time constant of a unity gain, first order plus time delay process is 5 min. If the phase lag at a frequency of 0.2 rad/min is 60°, then the dead time (in minutes) is
Q.45
A non-linear chemical system is exemplified by a/an
Q.46
The unit of 'time constant' of a system is the same as that of
Q.47
Thermal well made of __________ gives the fastest speed of response, while measuring temperature by thermocouples.
Q.48
The deflection in diaphragm (which is used as pressure sensor in pneumatic and electronic instruments) is dependent on the metal thickness, its diameter (d) and shape & number of corrugations. Its deflection is proportional to
Q.49
Compositional analysis of __________ is done using mass spectrometer.
Q.50
Routh stability method uses __________ loop transfer function.
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