CENTRAL INSTITUTE OF PLASTICS ENGINEERING & TECHNOLOGY
Question Bank
4/5 MARK ----QUESTION
COURSE : DPMT
SEMESTER: 3rd semester
SUBJECT : Engineering Metrology
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1. _______________is the repeatability of a measuring process
Ans.: Precision
2. B.H.N. Stands for ____________________
Ans.: Brinell Hardness Number
3. The two slip gauges in precision measurements are joined by _______________
Ans.: Wringing
4. _______________is the field of knowledge dealing with the problems of measurements
Ans.: Metrology
5. All the operations for the purpose of determining the values of the errors of a measuring instrument are
called __________________
Ans.: Calibration
6. Spirit levels are used for measuring ________________________
Ans.: small angle (or) inclinations
7. The accuracy of micrometers, calipers, dial indicators can be checked by a _______________
Ans.: Slip gauges
8. CMM Stands for _____________________
Ans.: Coordinate measuring machine
9. Least count of Vernier caliper _______________
Ans.: 0.02mm
10. A clinometer is also known as ____________
Ans.: Tilt meter or level gauge
11. RMS Stands for _________________
Ans.: Root Mean square
12. A _______________is used as a mechanical comparator
Ans.: dial gauge
13. Interferometer are optical instruments used for measuring __________________
Ans.: flatness
14. OPP stands for ___________________
Ans.: Optical Profile Projector
15. The comparators are generally used for _______________measurements.
Ans.: Linear
16. The toolmaker’s microscope is an _____________measurement machine.
Ans.: Optical
17. “GO” and “NO GO” gauges must fulfill _____________Principle.
Ans.: Taylors
18. The comparator should at least be able to record variations of_______________.
Ans.: 0.0025mm
19. Reed comparator is a _______________comparator.
Ans.: Mechanical
20. _____________comparator has got a bold scale and large indicator pointer.
Ans.: Sigma
21. The scale in generally not uniform in _____________comparators.
Ans.: Pneumatic
22. Optical comparators has very high ________________
Ans.: Magnification
23. BIS Stands for __________________
Ans.: Bureau of Indian Standards
24. For general use the measuring tip of a comparator should be
a) Flat b) Spherical c) Conical d) Concave
Ans.: b) Spherical
25. ___________________is grade of slip gauge in suitable for workshop
a) Grade 0 b) Grade 00 c) Grade 2 d) Grade 1
Ans.: c) Grade 2
26. Light source used in interferometer is
a) Helium b) Hydrogen c) krypton d) all the above
Ans.: d) all the above
27. Which one of the following is the least accurate measuring device
a) Airgauge b) Optical projecter c) Micro Meter d) Steel scale
Ans.: d) Steel scale
28. The least count of a micrometer
a) 0.5 mm b) 0.01mm c) 0.02mm d) 0.001mm
Ans.: b) 0.01mm
29. The combination set can be used to ______________
a) Check angular surface b) draw circles & arcs c) scribe line d) all of these
Ans.: a) Check angular surface
30. Millimeter scale in a micrometer is marked on
a) Barrel b) Thimble c) Anvil d) Ratchet
Ans.: a) Barrel
31. Optical flats are used in conjunction with
a) Angular Measurement b) Surface parallelism c) surface profile d) Interferometer measurements
Ans.: d) Interferometer measurements
32. _____________is used for measuring flatness
a) Profile projector b) CMM c) Tool makers microscope d) Interferometer
Ans.: d) Interferometer
33. According to Indian standards, the slip gauges according to accuracy are graded into following categories
a) 2 b) 3 c) 4 d) 6
Ans.: b) 3
34. Which of the following can be used to scribe line parallel to the edges of a part
a) Vernier caliper b) Screw gauge c) Divider d) Hermaphrodite caliper
Ans.: d) Hermaphrodite caliper
35. A feeler gauge is used to check
a) Radius b) Screw pitch c) Surface roughness d) Thickness of clearances
Ans.: d) Thickness of clearances
36. Optical flats are made of
a) Quartz b) Glass c) Plastic d) silicon
Ans.: a) Quartz
37. A sine bar is specified by
a) Its total length b) the centre distance between the two rollers
c) The size of rollers d) Weight of sine bar
Ans.: b) the centre distance between the two rollers
38. The number of slip gauges in set are
a) 87 b) 45 c) 103 d) 31
Ans.: c) 103
39. Profile of a gear tooth can be checked by
a) Sinebar b) Bench micrometer c) Optical projector d) Slip gauge
Ans.: c) Optical projector
40. The basic unit in angular measurement is
a) Degree b) Minute c) Second d) Right angle
Ans.: d) Right angle
41. Which of the following is not provided on Combination set
a) Centre head b) Protractor head c) Vernier scale d) Spirit level
Ans.: c) Vernier scale
42. A comparator for its working depends on
a) Accurately calibrated scale b) Comparison with standard such as slip gauges
c) Accurately micrometer gauge d) optical devices
Ans.: b) Comparison with standard such as slip gauges
43. Surface roughness on a drawing is represented by
a) Triangle b) Circles c) Squares d) rectangle
Ans.: a) Triangle
44. One micron is equal to
a) 1mm b) 0.1mm c) 0.01mm d) 0.001mm
Ans.: d) 0.001mm
45. Which of the following is not the angle measuring device?
a) Angle plate b) Sine bar c) Bevel protractor d) Angle Gauge
Ans.: a) Angle plate
46. Straight edges are used to measure
a) Parallelism b) Flatness c) Circularity d) Straight length of parts
Ans.: b) Flatness
47. Bevel protractor is used for
a) Angular measurements b) Linear measurements
c) height measurements d) flatness measurement
Ans.: a) Angular measurements
48. Autocollimator is used for
a) Parallelism measurement b) Straightness measurement
c) flatness measurement d) angular measurement
Ans.: d) angular measurement
49. Angle dekkor is another type of
a) Auto collimator b) Optical Square c) Clinometer d) angle gauge
Ans.: a) Auto collimator
50. The following is not used to measure angles
a) Bevel protractor b) Calibrated Levels c) Clinometers d) Optical flats
Ans.: d) Optical flats
51. “GO” and “NO GO” gauge is a type of
a) Plug gauge b) Slip gauge c) Ring gauge d) Limit gauge
Ans.: d) Limit gauge
52. The following is not a type of comparator
a) Electrical b) Pneumatic c) Optical d) Hydraulic
Ans.: d) Hydraulic
53. Optical gauge works on the principle of
a) Reflection b) Refraction c) Interference of light rays d) polarization
Ans.: c) Interference of light rays
54. The degree of closeness of the measured value of a certain quantity with its true value is known as
a) accuracy b) precision c) standard d) sensitivity
Ans.: a) accuracy
55. Error of Measurement
a) True Value – Measured value b) Precision – True value
c) Measured value – Precision d) none of the above.
Ans.: a) True Value – Measured value
56. The following is an internationally recognized and accepted unit system
a) MKS b) FPS c) SI d) All of the above.
Ans.: c) SI
57. The following is a line standard of measurement
a) Measuring tape b) slip gauge c) micrometer d) End bars
Ans.: a) Measuring tape
58. The following is used to check the diameters of holes
a) Plug gauge b) ring gauge c) Slip gauge d) Standard screw pitch gauge
Ans.: a) Plug gauge
59. Which of the following is not a type of direct measuring measurement?
a) Micrometer b) Vernier caliper c) Divider d) all the above
Ans.: c) Divider
60. Johansson mickrocator is a type of
a) Mechanical optical comparator b) Mechanical comparator
(c) Optical comparator d) Electrical comparator
Ans.: b) Mechanical comparator
61. Engineers parallels are available
a) Solid type b) Box type c) Adjustable type d) all of the above.
Ans.: d) all of the above
62. Combination set the squaring and scale cube used for
a) Height measurement b) Depth measurement c) Both of above d) none of all
Ans.: c) Both of above
63. Which type of comparator changes its magnification, when distance between cross strip hinge and knife
edge is varied?
a) Johnson mickrocator b) solex pneumatic comparator c) projector comparator d) sigma comparator
Ans.: d) sigma comparator
64. Which of the following instrument is most accurate
a) Mechanical comparator b) optical projector c) slip gauge d) vertical caliper
Ans.: b) optical projector
65. Which of the following errors are regularly repetitive in nature?
a) Systematic errors b) Random errors c) Illegitimate errors d) Controllable errors
Ans.: a) Systematic errors
66. A surface gauge is used for
a) Leveling the surface plate b) Checking the surface finish
c) Laying out the work accurately d) Finding the depth of the surface
Ans.: c) Laying out the work accurately
67. External taper can be accurately measured with the help of
a) Sine bar and slip gauges b) Dividing head c) Combination set d) Clinometer
Ans.: a) Sine bar and slip gauges
68. Standards to be used for reference purpose in Laboratories and workshops are referred to as
a) Primary standards b) Secondary standards c) Tertiary standards d) Working standards
Ans.: c) Tertiary standards
69. The following type of gauge has gauging sections combined on one end
a) Combination gauge b) Limit gauge c) Fixed gauge d) Progressive gauge
Ans.: d) Progressive gauge
70. Clinometer is related with
a) Engineers parallels b) Spirit level c) Angle Gauges d) sine bar
Ans.: b) Spirit level
71. Taylor’s principle is concerned with
a) Pneumatic comparators b) Gauging measurements
c) Angular measurements d) Roundness measurements
Ans.: b) Gauging measurements
72. Clinometer is used for
a) Angular measurement b) Linear measurement
c) Bore measurement d) Level of flat surfaces.
Ans.: a) Angular measurement
73. Measuring accuracy of Vernier bevel protractor
a) 5 Minutes b) 2 Minutes c) 10 Minutes d) 1 Minute
Ans.: a) 5 Minutes
74. Measuring accuracy of sine bar
a) 2 seconds b) 3 seconds c) 5 seconds d) 1 second
Ans.: a) 2 seconds
75. A work is usually required to be held in a vertical position for laying out for this purpose it is clamped to
a) Surface Plat b) an angle Plate c) a V Block d) Engineers square
Ans.: b) an angle Plate
76. Element of the indicating device carrying the scale is called
a) dial b) housing c) Index d) Frame
Ans.: a) dial
77. The term traceability in engineering metrology is concerned with
a) Measuring Machines b) Optical Instruments c) Standards d) Limits and fits
Ans.: d) Limits and fits
78. Sine bar is not preferred for measuring angle more than 45 degree – say True or False
Ans.: True
79. The various roughness grade number N1 to N24 in 5 groups are specified as under by BIS – Say True or
False
Ans.: True
80. As per Taylor’s principle gauges are made to check the minimum metal conditions say True or False
Ans.: True
81. V-block is used in the workshop to check the dimension of oval job – say True or False
Ans.: False
82. V block also be used to support rectangular components at 45 ° to the datum surface say True of false
Ans.: True
83. Universal surface gauge instrument used in non – precision measurements. say True of false
Ans.: True
84. Feeler gauges are used to measure the width of the gap between two parallel flat faces say True of false
Ans.: True
85. Screw pitch gauge is used for measuring (or) checking the pitch of internal threaded component only.
Say True of false
Ans.: True
86. In type A Vernier caliper the jaws are provided on both sides for external & internal measurements
Say True or false
Ans.: True
87. Error is the difference between the indicated and actual value of the measured say True or false
Ans.: True
88. Slip gauges are square blocks say True or false
Ans.: False
89. Universal bevel protractor, the blade cannot be rotated to measure any angles say True or false
Ans.: False
90. Least count of Vernier bevel protractor is 5 minutes say True or false
Ans.: True
91. Autocollimator is used for the measurement of small angular differences say True or false
Ans.: True
92. Sigma comparator is a type of mechanical comparator say True or False
Ans.: True
93. Mechanical comparators are compact and easy to handle. say True or False
Ans.: True
94. Slip gauges are rectangular block say True or False
Ans.: True
95. Engineers parallel available in three types. say True or False
Ans.: True
96. A spirit level consists of a sealed glass tube say True or False
Ans.: True
97. Sine bar based on the laws of Trigonometry say True of False
Ans.: True
98. Solex Pneumatic Comparator has very high magnification capacity - say True of False
Ans.: True
99. CMM is used for checking and measuring various gauges and fixtures- say True of False
Ans.: True
100. Which of these is not a type of micrometer
a) outside b) inside c) height d) depth
Ans. c) height
101. A ___________ consists of a hardened, precision ground body with two precision ground cylinders
fixed at the ends.
a) vernier caliper b) micrometer c) spirit level d) sine bar
Ans. d) sine bar
102. Sine bar is used in conjunction with slip gauges for precise ______ measurement
a) height b) angular c) distance d) depth
Ans. b) angular
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