livemcqs.com livemcqs.com MCQ On Units And Measurements 1. What is the standard unit of measurement of Force? a) Newton b) Joule c) Meter d) Newton-meter Answer: a 2. 89 Mega Joules can also be expressed as _____ a) 8900 Joules b) 89000000 Joules c) 89000 Joules d) 890000 Joules Answer: b 3. Convert 5 N to Dynes. a) 500000 Dynes b) 500 Dynes c) 5 Dynes d) 0.5 Dynes Answer: a 4. Which of the following is not a system of units? a) MKS b) CGS c) SI d) Decibel Answer: d 5. What does a Voltmeter measure? a) Voltage b) Current c) Length d) Speed Answer: a
Transcript
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MCQ On Units And Measurements 1. What is the standard unit of measurement of Force?
a) Newton
b) Joule
c) Meter
d) Newton-meter
Answer: a
2. 89 Mega Joules can also be expressed as _____
a) 8900 Joules
b) 89000000 Joules
c) 89000 Joules
d) 890000 Joules
Answer: b
3. Convert 5 N to Dynes.
a) 500000 Dynes
b) 500 Dynes
c) 5 Dynes
d) 0.5 Dynes
Answer: a
4. Which of the following is not a system of units?
a) MKS
b) CGS
c) SI
d) Decibel
Answer: d
5. What does a Voltmeter measure?
a) Voltage
b) Current
c) Length
d) Speed
Answer: a
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6. What is the unit of measurement of solid angles?
a) Steradians
b) Degrees
c) Radians
d) Grades
Answer: a
7. Which of the following system matches with the SI unit system?
a) FPS
b) MKS
c) CGS
d) American system
Answer: b
8. Which of the following is a unit of temperature?
a) Degree
b) Meter
c) Second
d) Fahrenheit
Answer: d
9. The number of base units for measuring physical quantities according to the SI system are ____
a) 1
b) 10
c) 7
d) 8
Answer: c
10. What is the unit for measuring intensity of light?
a) Candela
b) Lightyear
c) Meter
d) Mol
Answer: a
11. What is the full form of SI?
a) Standard International
b) System International
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c) Scientific International
d) Science International
Answer: b
12. Mass can be measured using _____
a) Beam balance
b) Clock
c) Our hands
d) Water
Answer: a
13. Mass is a _____
a) Scalar quantity
b) Vector quantity
c) Free quantity
d) Dependent quantity
Answer: a
14. Weight represents ___
a) Mass
b) Time
c) Pressure
d) Force
Answer: d
15. Which one of the following units can be used to measure matter?
a) Kilogram
b) Newton
c) Second
d) Mile
Answer: a
16. Which of the following is the standard unit of measurement of mass?
a) Gram
b) Kilogram
c) Pound
d) Dozen
Answer: b
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17. Which of the following is the correct relation?
a) 1 Kg = 100 g
b) 1 Kg = 1 g
c) 1 g = 0.001 Kg
d) 1 g = 0.01 Kg
Answer: c
18. Mass can be explained as _____
a) Amount of space
b) Amount of time
c) Amount of weight
d) Amount of matter
Answer: d
19. Distance between two cities, in standard units will be measured in ______
a) Meter
b) Kilometer
c) Mile
d) Centimeter
Answer: a
20. Which of the following devices cannot measure distance?
a) Vernier Calipers
b) Micrometer
c) Ruler
d) Protractor
Answer: d
21. How many inches are there in 1 yard?
a) 12
b) 36
c) 6
d) 18
Answer: b
22. How many kilometers make one mile?
a) 1
b) 2.5
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c) 0.5
d) 1.6
Answer: d
23. How many kilometers make one nautical mile?
a) 1
b) 1.536
c) 1.852
d) 1.756
Answer: c
24. Usually, what is the least count of a screw gauge?
a) 0.01 cm
b) 0.001 cm
c) 0.1 cm
d) 1 mm
Answer: b
25. How many kilometers make one light year?
a) 9.4607 × 1012 km
b) 9.4607 × 109 km
c) 9.4607 × 1011 km
d) 9.4607 × 1010 km
Answer: d
26. Interplanetary distances are measured in ____
a) Light year
b) Kilometer
c) Megameter
d) Watt
Answer: a
27. Which of the following are NOT units of time?
a) Second
b) Light year
c) Tropical year
d) Minute
Answer: b
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28. Which of the following unit is related to sound frequency?
a) Hertz
b) Decibel
c) Second
d) Meter
Answer: a
29. How many milliseconds make one second?
a) 10
b) 60
c) 45
d) 80
Answer: a
30. How many decades are there in 1 century?
a) 10
b) 20
c) 4
d) 5
Answer: a
31. How many years are there in one millennium?
a) 1000
b) 100
c) 10
d) 70
Answer: a
32. Which of the following gives the most accurate result for time measurement?
a) Wall clock
b) Digital watch
c) Quartz clock
d) Atomic clock
Answer: d
33. Which of the following is equivalent to one hour?
a) 36000 milliseconds
b) 3600 milliseconds
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c) 3600000 milliseconds
d) 360000 milliseconds
Answer: a
34. In 5 experiments with the same objective, the values obtained are very near to each other. These
values can be called ____
a) Precise
b) Accurate
c) Average
d) Invalid
Answer: a
35. Range of an instrument is _____
a) The minimum value that can be measured
b) The maximum value that can be measured
c) All values starting from the minimum to the maximum that can be measured
d) The average of all values that can be measured
Answer: c
36. Usually how many types of errors are present in scientific measurements?
a) 2
b) 3
c) 4
d) 5
Answer: b
37. What is least count of an instrument?
a) The lowest value that can be measured accurately
b) The greatest value that can be measured accurately
c) Half of the lowest value that can be measured accurately
d) Mean of the lowest and highest values
Answer: a
38. In an experiment, it is found that the experimental value is very close to actual value, hence the
experimental value can be called _____
a) Accurate
b) Precise
c) Suitable
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d) Mean
Answer: a
39. What is the reason for the occurrence of systematic errors in an instrument ?
a) No use for a long time
b) High use
c) Manufacturing fault
d) Delivery fault
Answer: b
40. How are systematic errors removed usually for an instrument?
a) By replacing it
b) By re-calibrating it
c) By using a repairing service
d) By not using it for some time
Answer: b
41. The length and breadth of a rectangle are 4.5 mm and 5.9 mm. Keeping the number of significant
figures in mind, its area in mm2 is ____
a) 22.55
b) 26.55
c) 26.6
d) 22
Answer: b
42. The number of significant digits in 1559.00 is ____
a) 6
b) 5
c) 3
d) 4
Answer: a
43. The number 0.005900, in standard scientific form can be expressed as ______
a) 5.9×103
b) 59×104
c) 5.9×102
d) 5.9×104
Answer: a
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44. Number of significant digits in 0.0028900 is ______
a) 5
b) 6
c) 7
d) 8
Answer: a
45. What is the number 75.66852 rounded off to 5 significant digits?
a) 75.67
b) 75.669
c) 75.668
d) 75.667
Answer: b
46. The length of a cube is 2.3 cm. What is its volume rounded off to 4 significant digits in cm3?
a) 12.67
b) 12.167
c) 12.17
d) 13
Answer: c
47. How many significant digits are there in 25.33600?
a) 7
b) 8
c) 5
d) 6
Answer: a
48. The number of significant digits in 5.002 is ____
a) 5
b) 4
c) 3
d) 6
Answer: b
49. The volume of a box, 10 m wide, 4.5m, long and 2.3 m high up to 3 significant digits in m3 is ____
a) 104
b) 103.5
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c) 103
d) 100
Answer: a
50. How many significant digits are there in 002.5001?
a) 1
b) 5
c) 7
d) 6
Answer: b
51. [MLT-2] matches with the dimensional formula of ___
a) Force
b) Modulus of elasticity
c) Displacement
d) Strain
Answer: a
52. What is the maximum number of unknowns that can be found through a simple dimensional
equation?
a) 6
b) 5
c) 3
d) 2
Answer: c
53. If, v stands for velocity, L for length, T for time and M for mass, what is the value of x in the equation
–
L = (vT/M)x?
a) 3
b) 2
c) 1
d) 0
Answer: d
54. Assuming standard notations, which of the following quantities is dimensionless?
a) v/a
b) P/Fv
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c) FE/L
d) V2/g
Answer: b
55. If the units of length and time are doubled, what will be the factor by which the unit of acceleration
will change?
a) 1
b) 0.25
c) 0.5
d) 2
Answer: c
56. What are the dimensions of a light year?
a) L
b) T
c) LT-1
d) M
Answer: a
57. What are the dimensions of coefficient of friction?
a) MLT-2
b) LT-1
c) L
d) It is dimensionless
Answer: d
58. Identify the primary quantity from the following.
a) Mass
b) Density
c) Speed
d) Volume
Answer: a
59. Which of the following is a use of dimensional analysis?
a) To check the dimensional correctness of an equation
b) To solve the equation dimensionally
c) To get the number of dimensional constants
d) To understand the dimensional equation
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Answer: a
60. The dimension whose unit does not depend on any other dimension’s unit is known as ________
