# 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

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 2

100 kN/m2 pressure is equal to

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

Question 3

10-12, is called

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

Question 4

Angular acceleration is expressed as

A. m/s2
B. w/s2

Question 5

Basic unit of thermodynamic temperature, is

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

Question 6

Candela (Cd) is used to express

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

Question 7

Hertz (Hz) is used to express

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

Question 8

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 9

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

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

Question 10

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

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

Question 11

In SI system, the unit of temperature, is

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

Question 12

In SI units, moment is expressed as

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

Question 13

Intensity of electric current is expressed in

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

Question 14

Joule or Newton metric is used for

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

Question 15

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

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

Question 16

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

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

Question 17

One Netwon force equals

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

Question 18

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 19

One Newton is equivalent to

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

Question 20

SI unit for the surface tension, is

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

Question 21

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 22

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 23

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 24

The S.I. unit of Modulus of elasticity is

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

Question 25

The SI unit of the force is

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

Question 26

The solid angles are measured in

A. degrees

Question 27

The thickness of a micron, is

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