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

Intensity of electric current is expressed in

A. volts

B. watts

C. amperes

D. joules.

Question 2

10-12, is called

A. Terra

B. pico

C. Giga

D. Mega

Question 3

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 4

One Netwon force equals

A. 105 dynes

B. 104 dynes

C. 103 dynes

D. 102 dynes

Question 5

One Newton is equivalent to

A. 0.10197 kgf

B. 0.20197 kgf

C. 9.80665 kgf

D. 0.97125 kgf

Question 6

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

A. kg/m3

B. N/m3

C. N/m2

D. none of these.

Question 7

The unit kg/m3 is used for

A. force

B. density

C. volume

D. pressure.

Question 8

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 9

The SI unit of the force is

A. Newton

B. Kilogrames

C. Joule

D. Erg

Question 10

Candela (Cd) is used to express

A. luminous intensity

B. electric current intensity

C. power

D. frequency.

Question 11

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 12

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 13

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

A. Kinematic viscosity

B. Dynamic viscosity

C. Mass density

D. Weight density.

Question 14

Joule or Newton metric is used for

A. Work

B. Torque

C. Energy

D. All the above.

Question 15

Angular acceleration is expressed as

A. m/s2

B. w/s2

C. rad/s2

D. rad/s

Question 16

100 kN/m2 pressure is equal to

A. 1 atm

B. 1 bar

C. 1 m bar

D. 1 mm Hg

Question 17

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

A. N/m3

B. kg/m3

C. m3/s

D. kg

Question 18

SI unit for the surface tension, is

A. kg/m3

B. kg/m2

C. kg/m

D. N/m

Question 19

Hertz (Hz) is used to express

A. Luminous intensity

B. electric current intensity

C. power

D. frequency.

Question 20

In SI system, the unit of temperature, is

A. Degree centigrade

B. Degree Celsius

C. Kelvin

D. Degree Fahrenheit.

Question 21

The S.I. unit of Modulus of elasticity is

A. Newton/m2

B. Newton/cm2

C. Newton/mm2

D. all the above.

Question 22

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

A. Surface tension

B. Kinematic viscosity

C. Pressure

D. Power.

Question 23

The solid angles are measured in

A. degrees

B. grades

C. radians

D. steradians.

Question 24

Basic unit of thermodynamic temperature, is

A. degree fahrenheit

B. degree centigrade

C. degree kelvin

D. degree absolute.

Question 25

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 26

In SI units, moment is expressed as

A. kg-m

B. kg-cm

C. kg-mm

D. all the above.

Question 27

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 28

The thickness of a micron, is

A. 10-3 m

B. 10-6 m

C. 10-9 m

D. 10-12 m