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Worksheets50-100
Total questions: 50
Worksheet time: 25mins
Name
Class
Date
1.
51. What is the role of a reference standard?
a)
A) To provide a known value for calibration
b)
B) To measure temperature
c)
C) To design instruments
d)
D) To store data
e)
E) Everything is right
2.
52. The SI unit for electric resistance is:
a)
A) Ohm
b)
B) Volt
c)
C) Ampere
d)
D) Watt
e)
E) Everything is right
3.
53. Which of these is NOT a characteristic of a good standard?
a)
A) Stability
b)
B) Reproducibility
c)
C) Accessibility
d)
D) Complexity
e)
E) Everything is right
4.
54. What is the purpose of a calibration certificate?
a)
A) To certify an instrument’s accuracy and traceability
b)
B) To repair instruments
c)
C) To sell instruments
d)
D) To describe manufacturing process
e)
E) Everything is right
5.
55. What is the difference between accuracy and precision?
a)
A) Accuracy is closeness to true value, precision is reproducibility
b)
B) They mean the same
c)
C) Accuracy relates to time, precision to length
d)
D) Precision is about calibration only
e)
E) Everything is right
6.
56. Which one is a method to reduce measurement uncertainty?
a)
A) Increase sample size
b)
B) Ignore errors
c)
C) Use old instruments
d)
D) Random guessing
e)
E) Everything is right
7.
57. What is a secondary standard?
a)
A) Calibrated against a primary standard
b)
B) Used only in manufacturing
c)
C) A standard not traceable
d)
D) A non-standard device
e)
E) Everything is right
8.
58. What is the fundamental difference between standardization and calibration?
a)
A) Standardization sets rules; calibration adjusts instruments
b)
B) Both mean the same
c)
C) Calibration sets rules; standardization measures
d)
D) Neither is related
e)
E) Everything is right
9.
59. What does “metrological confirmation” include?
a)
A) Calibration, verification, and maintenance
b)
B) Instrument design
c)
C) Ignoring errors
d)
D) Manufacturing process
e)
E) Everything is right
10.
60. The SI base unit for time is:
a)
A) Minute
b)
B) Hour
c)
C) Second
d)
D) Day
e)
E) Everything is right
11.
61. Which quantity is NOT a base quantity in the SI system?
a)
A) Length
b)
B) Mass
c)
C) Velocity
d)
D) Time
e)
E) Everything is right
12.
62. What is an accredited laboratory?
a)
A) A lab recognized for competence by an accreditation body
b)
B) A private shop
c)
C) A government office
d)
D) A training center
e)
E) Everything is right
13.
63. What is a calibration interval?
a)
A) Time between two calibrations
b)
B) Time to manufacture an instrument
c)
C) Duration of test
d)
D) Time to repair
e)
E) Everything is right
14.
64. Which of the following is an example of a physical quantity?
a)
A) Mass
b)
B) Quality
c)
C) Opinion
d)
D) Efficiency
e)
E) Everything is right
15.
65. What does “metrological traceability” require?
a)
A) An unbroken chain of comparisons to a standard
b)
B) Random checks
c)
C) Ignoring calibration
d)
D) Using unverified instruments
e)
E) Everything is right
16.
66. The SI unit for force is:
a)
A) Newton
b)
B) Watt
c)
C) Joule
d)
D) Pascal
e)
E) Everything is right
17.
67. What is the function of a standard operating procedure (SOP) in metrology?
a)
A) To describe step-by-step calibration and measurement processes
b)
B) To design products
c)
C) To sell instruments
d)
D) To calculate costs
e)
E) Everything is right
18.
68. What is a tolerance in measurement?
a)
A) The permissible limit of variation
b)
B) The exact value
c)
C) The measurement error
d)
D) The measuring instrument
e)
E) Everything is right
19.
69. What is the difference between systematic and random errors?
a)
A) Systematic errors are consistent, random errors vary unpredictably
b)
B) Both are the same
c)
C) Random errors are avoidable
d)
D) Systematic errors never affect results
e)
E) Everything is right
20.
70. The SI unit for electric capacitance is:
a)
A) Farad
b)
B) Henry
c)
C) Weber
d)
D) Tesla
e)
E) Everything is right
21.
71. What is the purpose of a measurement uncertainty budget?
a)
A) To list all sources of uncertainty and quantify them
b)
B) To buy new instruments
c)
C) To ignore small errors
d)
D) To store measurement data
e)
E) Everything is right
22.
72. What is the name of the system that defines the seven base units of measurement?
a)
A) Metric system
b)
B) Imperial system
c)
C) International System of Units (SI)
d)
D) US customary system
e)
E) Everything is right
23.
73. What is the SI unit for luminous intensity?
a)
A) Lux
b)
B) Candela
c)
C) Lumen
d)
D) Watt
e)
E) Everything is right
24.
74. Which type of error can be reduced by repeated measurements?
a)
A) Random error
b)
B) Systematic error
c)
C) Both
d)
D) None
e)
E) Everything is right
25.
75. The SI unit for magnetic field strength is:
a)
A) Tesla
b)
B) Weber
c)
C) Henry
d)
D) Farad
e)
E) Everything is right
26.
76. What is the meaning of “validation” in metrology?
a)
A) Confirmation that a method or instrument produces valid results
b)
B) Calibration process
c)
C) Repairing instruments
d)
D) Buying new equipment
e)
E) Everything is right
27.
77. Which of the following is NOT part of the measurement process?
a)
A) Calibration
b)
B) Verification
c)
C) Manufacturing
d)
D) Data analysis
e)
E) Everything is right
28.
78. What is an international standard?
a)
A) Standard accepted and used worldwide
b)
B) Local rule
c)
C) Company procedure
d)
D) Regional agreement
e)
E) Everything is right
29.
79. The SI unit for temperature on the Kelvin scale is:
a)
A) Celsius
b)
B) Kelvin
c)
C) Fahrenheit
d)
D) Rankine
e)
E) Everything is right
30.
80. What is the purpose of a quality management system in metrology?
a)
A) To ensure consistent measurement quality and reliability
b)
B) To sell more products
c)
C) To reduce costs only
d)
D) To monitor employees
e)
E) Everything is right
31.
81. What is the function of a calibration label on an instrument?
a)
A) To show calibration date and next due date
b)
B) To indicate price
c)
C) To display manufacturer
d)
D) To show warranty period
e)
E) Everything is right
32.
82.What is the physical quantity measured in volts? Everything is right
a)
A) Electric current
b)
B) Electric potential difference
c)
C) Resistance
d)
D) Power
e)
E) Everything is right
33.
83. What is the symbol for the unit of electric current?
a)
A) V
b)
B) A
c)
C) Ω
d)
D) W
e)
E) Everything is right
34.
84. What does “repeatability” mean in measurement?
a)
A) The ability to get the same result under unchanged conditions
b)
B) Changing results randomly
c)
C) First calibration
d)
D) Measurement error
e)
E) Everything is right
35.
85. Which one of these is an example of a derived unit?
a)
A) Meter
b)
B) Kilogram
c)
C) Newton
d)
D) Second
e)
E) Everything is right
36.
86. What is the SI unit for power?
a)
A) Watt
b)
B) Joule
c)
C) Volt
d)
D) Ampere
e)
E) Everything is right
37.
87. What does “uncertainty” in measurement mean?
a)
A) The doubt about the exactness of the measurement result
b)
B) The instrument error
c)
C) The measurement value
d)
D) The calibration date
e)
E) Everything is right
38.
88. Which organization publishes the International Vocabulary of Metrology (VIM)?
a)
A) ISO
b)
B) BIPM
c)
C) IEC
d)
D) OIML
e)
E) Everything is right
39.
89. What is the meaning of “calibration drift”? Everything is right
a)
A) Gradual change in instrument accuracy over time
b)
B) Sudden failure
c)
C) Initial calibration
d)
D) Using the instrument improperly
e)
E) Everything is right
40.
90. What is a “reference material” in metrology?
a)
A) A substance with known properties used for calibration
b)
B) Raw material for manufacturing
c)
C) Material for training
d)
D) A standard instrument
e)
E) Everything is right
41.
91. The SI unit for pressure is:
a)
A) Pascal
b)
B) Bar
c)
C) Atmosphere
d)
D) Torr
e)
E) Everything is right
42.
92. Which of the following is a method of expressing measurement uncertainty?
a)
A) Confidence interval
b)
B) Price
c)
C) Weight
d)
D) Length
e)
E) Everything is right
43.
93. What is the function of an uncertainty budget?
a)
A) To identify and quantify all uncertainty sources
b)
B) To increase errors
c)
C) To measure length
d)
D) To calibrate instruments
e)
E) Everything is right
44.
94. What is “metrological control”?
a)
A) Supervision and regulation of measurements and measuring instruments
b)
B) Product testing
c)
C) Sales regulation
d)
D) Accounting process
e)
E) Everything is right
45.
95. Which unit measures electric inductance?
a)
A) Henry
b)
B) Farad
c)
C) Tesla
d)
D) Weber
e)
E) Everything is right
46.
96. The SI unit of radioactivity (activity) is:
a)
A) Becquerel
b)
B) Curie
c)
C) Gray
d)
D) Sievert
e)
E) Everything is right
47.
97. What is a “calibration interval”?
a)
A) Time period between two calibrations
b)
B) Duration of measurement
c)
C) Instrument life
d)
D) Manufacturing time
e)
E) Everything is right
48.
98. What is the primary purpose of standardization?
a)
A) To ensure compatibility, safety, and quality
b)
B) To make products more expensive
c)
C) To reduce production speed
d)
D) To ignore regulations
e)
E) Everything is right
49.
99. Which quantity is measured in amperes?
a)
A) Voltage
b)
B) Electric current
c)
C) Resistance
d)
D) Power
e)
E) Everything is right
50.
100. What does the term “uncertainty” include?
a)
A) All possible errors and variations affecting a measurement
b)
B) Only systematic errors
c)
C) Only random errors
d)
D) Instrument specifications
e)
E) Everything is right
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