Q.1
Load cells are used for the measurement of
Q.2
Thermistors are used in __________ devices.
Q.3
__________ stability method uses open loop transfer function.
Q.4
Vapour actuated pressure spring thermometer does not require ambient temperature compensation. Ambient temperature compensation is provided in gas or liquid expansion pressure spring thermometer by
Q.5
Psychrometer determines the
Q.6
A constant volume gas thermometer employing __________ is used to measure sub-zero (i.e., < 0° C) temperature.
Q.7
Which of the following thermocouples is incapable of measuring sub-zero (i.e., < 0°C) temperature?
Q.8
A first order system with a time constant of 1 min is subjected to frequency response analysis. At an input frequency of 1 radian/min, the phase shift is
Q.9
Photoelectric pyrometers are suitable in the temperature range of __________ °C.
Q.10
A mercury thermometer can not be used to measure the temperature below the freezing point of mercury, which is __________ °C.
Q.11
Number of poles in a system with transfer function 1/(s² + 2s² + 1) is
Q.12
The amplitude ratio for the sinusoidal response of __________ is < 1.
Q.13
The amplitude ratio for the sinusoidal response of a __________ is 1.
Q.14
Phase margin is equal to
Q.15
Which of the following is not a second order instrument?
Q.16
Temperature of __________ can not be measured by an optical or radiation pyrometer.
Q.17
The characteristic equation for the control system with a closed loop transfer function G₁/1 + G₂ is given by 1 + G₂ = 0. The characteristic equation for the control system
Q.18
Dilute wine was used as a thermometric liquid initially to develop temperature scale. First emperical temperature scale developed was the __________ scale.
Q.19
Mass spectrometer is used for the composition analysis of
Q.20
Stability of a control system containing a transportation lag can be best analysed by
Q.21
Starting temperature of optical radiation pyrometer is __________ °C.
Q.22
Bourdon gauges are used for measuring pressure (kg/cm² )
Q.23
Which of the following is an undesirable dynamic characteristic of an instrument?
Q.24
Pick out the wrong statement
Q.25
Pick out the wrong statement.
Q.26
Pick out the wrong statement.
Q.27
Which of the following is not the triple point of water?
Q.28
The frequency response of a first order system, has a phase shift with lower and upper bounds given by
Q.29
Thermisters which have a very high temperature co-efficient of resistivity belong to the class of solid called
Q.30
Gain margin is equal to the
Q.31
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?
Q.32
The offset introduced by proportional controller with gain Kc in response of first order system can be reduced by
Q.33
In a second order under damped system, the
Q.34
A system with a double pole at the origin is unstable since the corresponding term in the time domain
Q.35
Use of I-control along with P-control facilitates
Q.36
Emf generated in a thermocouple depends on the temperature
Q.37
Stabilising time for the controllers is the time required for the response to reach __________ percent of its ultimate value.
Q.38
pH meter has
Q.39
A sinusoidal variation in the input passing through a linear first order system
Q.40
Continuous measurement of specific gravity of a liquid is done by
Q.41
Which of the following temperature measuring instruments need not touch the object whose temperature is being measured?
Q.42
Emf developed by a thermocouple while measuring a temperature of 400°C is 22 mV. The type of thermocouple used is
Q.43
The level of a liquid under pressure can be determined using
Q.44
The __________ of a vapor pressure thermometer is a functioning element.
Q.45
Working principle of mercury in glass thermometer is
Q.46
Which of the following is not a differential pressure flow meter?
Q.47
Which of the following is not a composition measuring instrument?
Q.48
Positioning controllers are used for
Q.49
Pick out the one which is a first order instrument.
Q.50
Emf developed by a thermocouple while measuring a temperature of 800°C is about 31 mV. The type of thermocouple used is
0 h : 0 m : 1 s