# SI Units MCQ Questions & Answers

SI Units MCQs : This section focuses on the "SI Units". These Multiple Choice Questions (MCQs) should be practiced to improve the SI Units skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.

Question 1

In S.I. system, symbol for the specific weight is

A. kg/m3
B. N/m3
C. N/m2
D. none of these.

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Question 2

One Newton is equivalent to

A. 0.10197 kgf
B. 0.20197 kgf
C. 9.80665 kgf
D. 0.97125 kgf

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Question 3

The solid angles are measured in

A. degrees
B. grades
C. radians
D. steradians.

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Question 4

One Newton force produces an acceleration of

A. 1 cm/sec2 while acting on a body of 1 gm mass
B. 1 cm/sec2 while acting on a body of 1 kg mass
C. 1 m/sec2 while acting on a body of 1 kg mass
D. 1 m/sec2 while acting on a body of 1 gm mass.

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Question 5

One Netwon force equals

A. 105 dynes
B. 104 dynes
C. 103 dynes
D. 102 dynes

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Question 6

Intensity of electric current is expressed in

A. volts
B. watts
C. amperes
D. joules.

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Question 7

N-s/m2 is used in S.I. system for

A. Kinematic viscosity
B. Dynamic viscosity
C. Mass density
D. Weight density.

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Question 8

Hertz (Hz) is used to express

A. Luminous intensity
B. electric current intensity
C. power
D. frequency.

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Question 9

In SI units, moment is expressed as

A. kg-m
B. kg-cm
C. kg-mm
D. all the above.

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Question 10

Basic unit of thermodynamic temperature, is

A. degree fahrenheit
B. degree centigrade
C. degree kelvin
D. degree absolute.

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Question 11

The unit kg/m3 is used for

A. force
B. density
C. volume
D. pressure.

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Question 12

100 kN/m2 pressure is equal to

A. 1 atm
B. 1 bar
C. 1 m bar
D. 1 mm Hg

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Question 13

If α is the angular acceleration of a body of moment of inertia I, the torque is

A. I2 α
B. I α
C. I/α
D. I2/α

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Question 14

The fundamental units in S.I. system, are the same as that of

A. C.G.S. units
B. F.P.S. units
C. M.K.S. units
D. None of these.

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Question 15

The thickness of a micron, is

A. 10-3 m
B. 10-6 m
C. 10-9 m
D. 10-12 m

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Question 16

The S.I. unit of Modulus of elasticity is

A. Newton/m2
B. Newton/cm2
C. Newton/mm2
D. all the above.

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Question 17

In S.I. system, the symbol for density is

A. N/m3
B. kg/m3
C. m3/s
D. kg

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Question 18

1 kg wt in gravitational unit equals

A. 8.9 N in SI system
B. 9.8 N in SI system
C. 4.5 N in SI system
D. 5.4 N in SI system.

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Question 19

10-12, is called

A. Terra
B. pico
C. Giga
D. Mega

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Question 20

The intensity of pressure at a certain place is 1 kg (f)/m2, the intensity of pressur e in SI units will be

A. 47.88 N/m2
B. 9.81 N/m2
C. 4.882 N/m2
D. 0.07013 N/m2

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Question 21

Angular acceleration is expressed as

A. m/s2
B. w/s2
C. rad/s2
D. rad/s

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Question 22

The fundamental units in S.I. System are :

A. Centimetre, gram, second
B. Foot, pound, second
C. Metre, kilogram, second
D. Kilometre, kilogram, minute

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Question 23

In SI system, the unit of temperature, is

A. Degree centigrade
B. Degree Celsius
C. Kelvin
D. Degree Fahrenheit.

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Question 24

Candela (Cd) is used to express

A. luminous intensity
B. electric current intensity
C. power
D. frequency.

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Question 25

Joule or Newton metric is used for

A. Work
B. Torque
C. Energy
D. All the above.

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Question 26

The SI unit of the force is

A. Newton
B. Kilogrames
C. Joule
D. Erg

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Question 27

SI unit for the surface tension, is

A. kg/m3
B. kg/m2
C. kg/m
D. N/m

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Question 28

m2/s is used in S.I. system for

A. Surface tension
B. Kinematic viscosity
C. Pressure
D. Power.

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