Q.1
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
Q.2
The term analogous to the electrical current in a thermal system is the
Q.3
What is the normal percentage of rhodium in platinum + rhodium element used in the thermocouple?
Q.4
Platinum resistance thermometer is the international standard for temperature measurement between
Q.5
Which of the following thermocouples has the widest temperature measurement range?
Q.6
Configuration of Bourdon spring tube is never made of __________ shape.
Q.7
__________ is an example of distributed parameter system
Q.8
Continuous measurement of moisture in paper is done by
Q.9
Ordinary mercury in glass thermometer is used for measuring temperature upto 120°C. However, for measuring higher temperature upto __________ °C, thermometer is made by filling nitrogen under pressure above the mercury, which stops the evaporation of mercury and reduces the chance of broken thread of mercury.
Q.10
In a feed-back control system G and H denote open loop and close loop transfer functions respectively. The output-input relationship is
Q.11
E.m.f. generated by thermocouples is of the order of
Q.12
Which of the following does not figure in the list of seven substances selected for international temperature scale?
Q.13
Which of the following fluid flow measuring devices can measure the largest flow rate?
Q.14
Working principle of bimetallic thermometers is difference in linear co-efficient of thermal expansion of two strips of different metals welded together. Which of the following has the maximum thermal co-efficient of linear expansion?
Q.15
According to Bode stability criterian, a system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at frequency for which phase lag is
Q.16
Accurate temperature measurement performance of a radiation pyrometer can not be affected, if the
Q.17
Mercury thermometer can be used to measure the temperature upto __________ °C.
Q.18
The closed loop pole of a stable second order system could be
Q.19
When a bare thermocouple is covered by a protective sheath, the response becomes
Q.20
Volumetric expansion is the working principle of the __________ thermometers.
Q.21
Smoke density of the flue gas going out of the chimney is measured by a
Q.22
The __________ of the fluid contained in the temperature sensing element (i.e., bulb) of filled system thermometers changes with change in temperature.
Q.23
Which of the following relates the absorption & evolution of heat at the junctions of a thermocouple to the current flow in the circuit?
Q.24
Turbine flow meters are suitable for
Q.25
Liquid flow rate in an open channel can not be measured by a/an
Q.26
Reference points i.e., ice point and steam point in Reaumer temperature scale are respectively
Q.27
Range of hydrogen gas constant volume themometer is __________ °C.
Q.28
Which of the following measurements can be made by the measurement of emf?
Q.29
Conversion formula for converting amplitude ratio (AR) into decibels is
Q.30
Flow rate of those fluids which are insensitive to changes in their density, viscosity or flow velocity profile can be best measured by a
Q.31
The initial value (t=0) of the unit step response of the transfer function [(s + 1)/(2s + 1)] is
Q.32
Transfer function of transportation lag is
Q.33
Which of the following is not a mechanical pressure sensing element?
Q.34
Cascade control means
Q.35
Pick out the most suitable instrument for measuring temperature in the range of-40 to 425°C.
Q.36
What is the Laplace transform of impulse input having magnitude 'X' ?
Q.37
Dead zone is the
Q.38
A typical example of a physical system with under damped characteristic is a
Q.39
The function of a transducer is to
Q.40
Out of the following temperature measuring instruments, the measurement accuracy will be minimum for the
Q.41
Mcleoid gauge is used to measure the
Q.42
Maximum differential pressure in liquid manometer is __________ psi.
Q.43
In second order underdamped system,
Q.44
A control system has the following transfer function F(s) = (s - 1)(s + 1)/s(s - 2)(s + 4)
The initial value of the corresponding time function is
Q.45
What is the Laplace transform of sin t ?
Q.46
Bode diagram is a plot of
Q.47
Bourdon tube is never made of
Q.48
All the thermocouples used for temperature measurement use dissimilar metal
Q.49
Which of the following filled system expansion thermometers has the lowest positive temperature measurement capability?
Q.50
Flame photometry is used for the determination of compositional analysis of
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