# 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.

Question 2

One Newton is equivalent to

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

Question 3

The solid angles are measured in

A. degrees

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.

Question 5

One Netwon force equals

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

Question 6

Intensity of electric current is expressed in

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

Question 7

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

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

Question 8

Hertz (Hz) is used to express

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

Question 9

In SI units, moment is expressed as

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

Question 10

Basic unit of thermodynamic temperature, is

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

Question 11

The unit kg/m3 is used for

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

Question 12

100 kN/m2 pressure is equal to

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

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

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.

Question 15

The thickness of a micron, is

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

Question 16

The S.I. unit of Modulus of elasticity is

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

Question 17

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

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

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.

Question 19

10-12, is called

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

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

Question 21

Angular acceleration is expressed as

A. m/s2
B. w/s2

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

Question 23

In SI system, the unit of temperature, is

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

Question 24

Candela (Cd) is used to express

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

Question 25

Joule or Newton metric is used for

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

Question 26

The SI unit of the force is

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

Question 27

SI unit for the surface tension, is

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