Correct : D. The difference between the measured values of the same quantity
2. One of more electronic tubes are used in the circuitry of a VTVM for
Correct : C. both for amplification and rectification
3. Which of the following thermocouple can be used for temperatures above 1000?C
Correct : A. Platinum - Rhodium
4. The advantage of digital instruments is
Correct : E. All of the above
5. The standard sulphur point temperature is
Correct : B. 444.60?C
6. Odometer is used to measure
Correct : A. Distances
7. Accuracy of mesurements depends upon
Correct : D. all of above
8. A three digit 0 - 1 V digital voltmeter will have a resolution of
Correct : B. 1 mV
9. Which of the following materials has maximum resistivity
Correct : B. Isoeleastic
10. Under force-current analogy, viscous friction coefficient is considered analogous to
Correct : C. Reciprocal of resistance
11. Loading error in a system can be classified as
Correct : A. Systematic error
12. A piezometer is used to measure
Correct : A. Very low pressures
13. Range of temperature measurement of a resistance thermometer is
Correct : D. ? 400? F to 1800? F
14. The pH value of pure water could be
Correct : B. 7
15. The sensitivity accuracy of an instrument depends on
Correct : C. Tempearature variations
16. Mcleod gauge is used to measure
Correct : C. Vacuum
17. The material used in the construction of a thermistor is
Correct : A. Nickel oxide
18. A magneto-strictive transducer works on the principle of variations of
Correct : A. Permeability of magnetic materials when subjected to strain
19. A right balance meter cannot measure
Correct : D. All of the above
20. Which of the following is the displacement type blow measuring device?
Correct : E. Turbine
21. The carrier material used with strain gages at room temperatuer is
Correct : A. impregnated paper
22. The specific conductance of good quality raw water is
Correct : E. 100 micro mho/cm
23. Which of the following phosphor bronze material is usually brazed?
Correct : A. Beryllium copper
24. A temperature sensitive transducer is subjected to a sudden temperature change. It takes 18 seconds for the transducer to reach equilibrium condition (five times constant). The time taken by the transducer to read half of the temperature difference will be nearly
Correct : D. 1.38 second
25. A fathometer works on the principle of
Correct : B. Reflection of sound waves
26. A load cell cannot be used to measure
Correct : B. Temperature
27. Thermistors have
Correct : D. High and negative temperature coefficient
28. The flow of non-conducting medium cannot be measured by
Correct : C. Electro magnetic meter
29. Natural error in measurements is due variation in
Correct : D. Any of the above
30. Which of the following standard can be used for defining length?
Correct : D. Any of the above
31. The static error bank of an instrument does not include
Correct : B. Electrical draft
32. Platinum is used in resistance thermometers because of
Correct : C. Low cost, high stability and wide operating range
33. Under force-current analogy, velocity is considered analogous to
Correct : A. Voltage
34. To measure the speed of a shaft without physical contact the method used is
Correct : D. Any of the above
35. A measure of the system's ability to handle transients is known as
Correct : B. Rise time
36. Contraction or expansion due to changes in temperature can be measured by
Correct : B. Dilatometer
37. The accuracy depends upon
Correct : D. All of the above
38. Which of the following is the area meter?
Correct : C. rotameter
39. A error that always follows the same definite mathematical or physical law is known as
Correct : D. Systematic error
40. Which of the following is not a source of power?
Correct : C. Thermo-couple
41. A hot wire anemometer is used to measure
Correct : A. Gas velocities
42. Freeqing point of mercury is
Correct : C. ? 38.87?C
43. Which of the following transducers is preferred for measurements involving sound
Correct : C. peizoelectric pick up
44. Which of the following magnetic material has least value of (B.H.)max?
Correct : C. Carbon steel
45. A load cell is essentially a
Correct : A. Strain gauge
46. Bolometers are used for measurement of
Correct : A. Thermal radiations
47. Which of the following strain gauge material has the highest value of gauge factor?
Correct : E. Soft iron
48. Ceremets are
Correct : A. resistance elements
49. The standard silver point temperature is
Correct : D. 860.5?C
50. The maximum allowable limit that a measurement may vary from the true value is known as
Correct : B. permissible error
51. A pirani gauge works on the principle of change of
Correct : D. Thermal conductivity of medium
52. The thickness of oil film between gage blocks is of the order of
Correct : A. 0.2 microinch
53. The degree of perfection used in instruments, the methods and the observations, is known as
Correct : E. Precision
54. A flow measuring system with a square root extractor usually has
Correct : A. Linear scale
55. A flapper nozzle is used in
Correct : C. Pneumatic controller
56. Which of the following materials has minimum temperature coefficient of resistance
Correct : A. Constantan
57. The direction of current in case of antimony bismuth thermocouple will be
Correct : A. From antimony to bismuth at the cold junction
58. A hydrometer can be used to measure
Correct : E. Specific gravity of liquids
59. The advantage of piezoelectric crystal as transducer is
Correct : E. All of the above
60. In a thermocouple, the potential between the two junctions is due to the temperature gradient along the conductors in the circuit. This effect is named as
Correct : B. Thomson's effect
61. Nickel is the major constituent of which the following pressure gauge Bourdon tube material
Correct : C. K' monel
62. In a car the fuel level is measured by
Correct : B. Float method
63. Flow rate of a river can be determined by
Correct : A. Weir
64. Under force-current analogy, the reciprocal of inductance is considered analogous to
Correct : B. Spring constant
65. The larget range through which the measurable variable can change without the change being indicated by the indicator is known as
Correct : C. Dead zone
66. Which of the following instruments is preferred for the measurement of pressure in a steam condenser
Correct : A. Kentometer
67. Which of the following materials has macimum gaga factor
Correct : B. Isoelastic
68. The most sensitive thermocouple out of the following
Correct : B. chromel-constantan
69. Invar, the least expensible steel alloys used for measuring tapes contains about 30% of
Correct : E. Nickel
70. The statement "The most probable value of an observed quantity available from a given set of observation is the one for which the sum of the square of errors is a minimum" is known as
Correct : C. Principle of least squares
71. For bridge circuit of strain gauge which source of power will be ideal?
Correct : A. High frequency ac source
72. A first order system when subjected to a step input has a temperature rise of 25?C after one hour and 37.5?C after two hours, starting from cold conditions. The final steady temperature rise will be
Correct : E. 50?C
73. The degree of perfection used in instruments, techniques are observations is known as
Correct : B. Precision
74. An electrometer is used for the measurement of
Correct : C. Both (A) and (B) above
75. A synchro is
Correct : C. An angular position transducer
76. The errors which form inexperience of the observer are known as
Correct : B. Mistakes
77. The duty cycle of a pulse of width 2 micro sec and repetition frequency 4 kHz is
Correct : B. 0.008
78. Which of the following device cannot be used to measure pressure?
Correct : E. Bolometer
79. If a measuring tape is too long as compared to standard, the error will be known as
Correct : E. Instrumental error
80. An iron-constantan thermocouple can be used for the temperature
Correct : A. ?175?C to 900?C
81. For measuring the temperature of a boiler furnace which one of the following is the appropriate thermometer?
Correct : A. Optical pyrometer
82. The resistance of a strain gauge should be high
Correct : B. To reduce hysteresis effect
83. Which of the following transducer is used to translate linear motion into electrical signals?
Correct : B. LVDT
84. If an error under the same conditions will always be of the same size and sign, it is known as
Correct : E. Either of (B) and (C) above
85. The degree of fementation in brewing pressure can be measured by
Correct : C. pH meter
86. Which of the following will be the most alkaline solution?
Correct : E. pH 14
87. McLeod gage is used to measure
Correct : A. pressure
88. The standard oxygen point temperature is
Correct : D. ?182.27?C
89. In measurements using two strain gauges, the purpose of dummy strain gauge is
Correct : A. To unllify the errors due to temperature
90. If a steam pressure of 10 kg/cm2 is to be measured, the range of pressure gauge should be
Correct : C. 0 to 20 kg kg/cm2
91. Which of the following can be used as thermal detector?
Correct : E. Any of the above
92. The electricl resistarice of a wire is
Correct : A. Directly proportional to diameter and inversely proportional to length
93. The joints of a phosphor-bronze Bourdon tubes are
Correct : C. Soldered
94. Which of the following temperature is highest.
Correct : D. None of the above
95. Which of the following device can be used to give an indication for temperature changes?
Correct : D. Thermocouple
96. A simple ac amplifier may be used to amplify dc input through use of an additional circuit component known as
Correct : C. chopper
97. Positive displacement flow meters are
Correct : C. quantity flow meter
98. Which of the following meter is preferred for the measurement of pressure in a steam condenser?
Correct : B. Kentometer
99. A rotameter is used to measure
Correct : A. velocity of liquids
100. Which of the following transducer is preferred for measurements involving sound?