1. Which of the following is the function of instrumentals and measurement System?
2. The deflection of pointer of a speedometer of the automobile performs the function of
3. An act or the result of comparison between the quantity whose magnitude is unknown and a predefined standard is known as
4.
5. Which of the following is the basic requirement of a good quality measurement system / instrument?
6. The function of a thermostatic device in an oven is to
7. The quantity or the variable under measurement makes its first contact with which element of a measurement system is known as:
8. Variable conversion element performs the function of:
9. The process of preventing or removing the signal contamination or distortion by unwanted signals is known as:
10. Signal conditioning process consists of
11. Which of the following is commonly known as Intermediate Stage in the measurement system / instrument?
12. The Bourdon tube in a pressure gauge acts as:
13. The mechanical instruments cannot be used for dynamic measurement because of their
14. The purpose of the instrument is to:
15. The integrating instruments are those which
16. An instrument which has all the physical elements in one assembly is known as
17. Optical pyrometer is which type of instrument
18. The dial indicator is which type of instrument
19. Analog signals are those which :
20. Digital signals are those which
21. The digital devices have:
22. Dial type pressure gauge is :
23. An instrument that inputs an analog electrical signal and outputs a binary number is known as:
24. While selecting an instrument for a given fluid which data pertaining to processing fluids is considered:
25. Increasing the accuracy or resolution of an instrument would give:
26. For medium pressure or vacuum sensing which type of instrument is used:
27. Resistance thermometers are in common use within the temperature range:
28. The purpose of installing a bleed with pressure gauge is to :
29. Which of the following is an undesired characteristic in the instrument?
30. Which of the following are all desired characteristics in the instrument?
31. A meter reads 220.5 V and the true value of voltage is 220.02 V. The static correction for this instrument would be :
32. Which of the following is true for scale span?
33. The relative static error is
34. The degree of closeness with which a given value may be repeatedly measured is called:
35. The readability of an instrument depends upon:
36. The departure in the output of the instrument over the period of time.
37. The ratio of the magnitude of the output signal or response to the magnitude of input signal of the quantity bring measured.
38. The maximum deviation of the instrument input-output characteristics from the straight line so placed as to minimize the maximum deviation is known as.
39. Which of the following is not a dynamic characteristic of any measurement system?
40. The delay in the response of an instrument to a change in the measured quantity is known as
41. The total dynamic error of the instrument includes the difference between input and output of the system with regard to
42. The change in measured value from one steady sate to another steady sate is called
43. The maximum amount by which moving system moves beyond the steady state position is known as
44. The phenomenon under which the measuring instrument shows different output effects during loading and unloading is known as
45. The numerical value of hysteresis is specified in terms of
46. Hysteresis in the instrument is due to the presence of
47. The smallest measureable input in a measuring instrument is called
48. Any signal that does not convey any useful information is known as
49. The indicating instruments are
50. The analog indicating instruments are
51.
Deflecting torque in an indicating instrumentis the
52. The controlling torque is required to
53. Damping torque is one which acts on the moving system of the instrument
54. When an alternating current is allowed to flow in a magnetic circuit, the current will
55. The angle between magnetic flux acting on aluminum disc and induced e.m.f. will be
56. The angle between the induced e.m.f and eddy current flowing in the aluminum disc will be:
57. The deflecting torque produced in single phase induction type instruments is zero when the angle ? between main flux F and eddy current is
58. To produce a resultant deflecting torque, in shaded pole type instruments, the angle ? between two fluxes acting on the aluminum disc should be
59. Analog to digital convectors are used in case of
60. In case of induction type voltmeters, the current flowing through coil is of the order of
61. The deflecting torque is directly proportional to square of the load current and the scale is uniform in case of
62. The induction type instruments can be used on
63. To compensate for variation in frequency, a non inductive shunt across the coil in case of …………which results in increase in impedance of the winding and causes a greater proportion of the total current to flow in the non inductive shunt
64. Dynamo-meter type watt meters can be used on
65. In case of dynamometer type watt meter, the current coil is always connected in ………… with the load.
66. In case of dynamometer type watt meter, the pressure coil is always connected in ………… with the load.
67. In case of induction type watt-hour meter, the C - Magnet is used to provide;
68. Creep error can be rectified by drilling a small hole in the aluminum disc passing through the magnetic flux of
69. An inverse transducer converts
70. The ratio of change in output for a given change in input for a transducer is:
71. A transducer, which develops its output in the form of electrical current or voltage without any auxiliary source, is called
72. When experimentally obtained transfer function deviates from the theoretical transfer function for almost every input it is called
73. To avoid loading effect, it is necessary that a transducer has
74. Purely mechanical instruments cannot be used for dynamic measurements because they have
75. Bourdon tubes have the advantages of
76. The most commonly used material for bellows pressure sensing elements are
77. Which one of the following is not a force summing devices?
78. The sensitivity of a capsule increases in proportion to its
79. The resistive transducer operates on the principle of
80. A strain gauge is employed for converting
81. The device working on the principle of variation in resistance is
82. Potentiometer is a
83. A load cell is essentially a
84. Capacitive transducers are normally employed for which type of measurement?
85. Capacitive transducer operate upon the principle of
86. The capacitance of the capacitive transducer varies
87. The capacitance is
88. The dielectric constant of a process material can change due to variations in
89. A long straight coil of wire used to generate a nearly uniform magnetic field
90. The inductive transducers work on the principle of the
91. The principle of operation of LVDT is based on variation in
92. In a LVDT when the core is centrally located in the assembly, the voltage induced in each secondary is
93. An LVDT has an input in the form of
94. Difference between absolute pressure and atmospheric pressure is called
95. Gauge pressure represents
96. The type of manometers include
97. In Bourdon tube, non-linear motion has to be converted to linear rotational response by means of
98. Which of the following statement is true for elastic transducer?
99. The dead weight tester is used to
100. The dead weight tester apparatus consists of
101. The McLeod Gauge is used to
102. Which of the following is true about Pirani gauges?
103. Ionization guage works on the principle of
104. 100°C is equal to
105. Which of the following is the temperature transducer working on temperature-pressure-motion relationship?
106. In bimetallic strip which metal will be on the outer side of the curve when the strip is heated?
107. The working principle of a thermocouple depends on
108. Which of the following thermocouples is more sensitive?
109. Semiconductor which behaves as resistor with high negative temperature coefficient of resistance are known as
110. Optical pyrometers are used to measure temperature of
111. In optical pyrometer when the filament is superimposed over the image of the temperature source disappears, it indicates that
112. Which of the following is true with regard to thermistors?
113. Which of the following statement is true for thermistor?
114. Rotameter is a
115. Flow meter that use transducers to transmit and/or receive ultrasonic waves
116. Differential pressure flow meters include
117. Flow meterconsisting of a tube withashort,narrow center section and widened, tapered ends is:
118. Which type ofcontrol system is used to control the process by using the difference between the output and reference input.
119. The value of a process variable that is desired to be maintained in the process is called ......................
120. The system that serves to maintain a process variable at the set point is called
121. The component of process control system which compares the set-value and actual value of the parameter is known as
122. The characteristic that a dynamic variable adopts some nominal value commensurate with the load with no control action is known as
123. The difference between measured variable and setpoint is known as
124. ...................... is the elapsed time between the instant a deviation (error) occurs and when the corrective action first occurs.
125. In which mode of controller, control action is taken for every value of error.
126. The control mode in which control action is taken for only two values of error is called
127. Flow diversion valve of a HTST plant is a
128. A control mode in which the controller output is directly proportional to the error signal is called
129.
The proportional controller output is given by the expression P(t) = Kp e(t) + p(0).
In this p(0) indicates the term
130. Proportional band is defined as
131. Which type of controller is frequently used for the control of temperature in HTST pasteurizer?
132. Which type of controller increases the speed of response to reach the desired set point the fastest while eliminating offset?
133. The final control element that implements the control action is
134. Solenoid actuators uses ........................... to move the stem which allows the valve to either be fully open or fully closed.
135. The pneumatic valve is a
136. Manual valves ......................... to positionthem to control a process variable.
137. An actuator is the part of a final control device that causes ............... in the final control device when signaled to do so.
138. In a strain gauge pressure transducer strain gauge is attached:
139. Which of the following is true for a variable capacitance pressure transducer:
140. A pressure sensor that provides a simple method for obtaining an electrical output from a mechanical pressure gauge is:
141. Potentiometric pressure sensors drive a wiper arm on a resistive element.
142. Which of the following is true for Inductive Pressure Sensor
143. Which of the following is true with regard to float type level indicator?
144. The level indicator based on principle of variable permeability is known as
145. The capacitive transducer employed in detecting the level of liquids and solids in a container is based on :
146. In measurement of liquid level with Gamma Rays, the output of Geiger Müller tube is:
147. Which of the following statement is true for the ultrasonic level indicator?
148. The instrument employing only mechanical parts and mechanical movements for the measurement of speed is known as:.
149. Which of the following is an electrical tachometer?
150. In which type of hygrometer the inside temperature of the cell is measured with the help of thermometer and the absolute humidity or the dew point temperature is determined.
151. In the Impedance type hygrometer the total probe impedance is:
152. In resistive type hygrometer there is a coating of moisture sensitive chemical which exhibits a change in resistivity with the humidity. This chemical is:
153. Electromagnetic switching relay used to switch on the power supply to electric equipments.
154. The air operated milk valve is driven by
155. The sensing bulb of self acting steam thermostat is filled with:
156. The period of oscillation of a mechanical oscillator is used to measure:
157. The outlet air temperature in a spray drying chamber is controlled by
158. Cleaning is achieved by:
159. The number of CIP circuits depends upon :
160. Solution Analyzers to control the concentration by
161. In automatic chlorinator using venturi flow meter, the quantity of chlorine solution injected to the water line is: