Civil Engineering SI Units Quiz (or) MCQ

1 .

One Newton is equivalent to

A)

0.10197 kgf

B)

0.20197 kgf

C)

0.97125 kgf

D)

9.80665 kgf

Correct Answer : Option (A) : 0.10197 kgf

2 .

mÂ²/s is used in S.I. system for

A)

Power

B)

Pressure

C)

Surface tension

D)

Kinematic viscosity

Correct Answer : Option (D) : Kinematic viscosity

3 .

The S.I. unit of Modulus of elasticity is

A)

Newton/mÂ²

B)

Newton/cmÂ²

C)

Newton/mmÂ²

D)

All of the above

Correct Answer : Option (D) : All of the above

4 .

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

Correct Answer : Option (B) : 9.8 N in SI system

5 .

To convert the units of M.K.S. to units of S.I., a factor 9.80665 is used for

A)

mass

B)

force

C)

work energy

D)

All of the above

Correct Answer : Option (D) : All of the above

Explanation : * mass
* force
* work energy
* power

6 .

SI unit for the surface tension, is

A)

N/m

B)

kg/m

C)

kg/mÂ²

D)

kg/mÂ³

Correct Answer : Option (A) : N/m

7 .

Pick up the correct statement from the following :

A)

In S.I. system, pressure is expressed in N/m²

B)

In S.I. system, force is expressed in Newtons

C)

In S.I. system, power is expressed in watts

D)

All of the above

Correct Answer : Option (D) : All of the above

Explaination : * In S.I. system, pressure is expressed in N/m²
* In S.I. system, force is expressed in Newtons
* In S.I. system, power is expressed in watts
* In S.I. system, surface tension is expressed in Newton per metre

8 .

100 kN/mÂ² pressure is equal to

A)

1 atm

B)

1 bar

C)

1 m bar

D)

1 mm Hg

Correct Answer : Option (B) : 1 bar

9 .

One Netwon force equals

A)

10âµ dynes

B)

10â´ dynes

C)

10Â³ dynes

D)

10Â² dynes

Correct Answer : Option (A) : 10âµ dynes

10 .

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

A)

kg

B)

mÂ³/s

C)

kg/mÂ³

D)

N/mÂ³

Correct Answer : Option (C) : kg/mÂ³

11 .

Pick up the correct statement from the following :

A)

1 kgf = 9.80665 N

B)

1 N force = 0.10197 kgf

C)

1 kgf/cm² = 98.0665 kN/m²

D)

All of the above

Correct Answer : Option (D) : All of the above

Explaination : * 1 kgf = 9.80665 N
* 1 N force = 0.10197 kgf
* 1 kgf/cm² = 98.0665 kN/m²
* 1 atm = 101.325 kN/m²

12 .

The intensity of pressure at a certain place is 1 kg (f)/mÂ², the intensity of pressur e in SI units will be

A)

0.07013 N/mÂ²

B)

4.882 N/mÂ²

C)

9.81 N/mÂ²

D)

47.88 N/mÂ²

Correct Answer : Option (C) : 9.81 N/mÂ²

13 .

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

A)

I Î±

B)

IÂ² Î±

C)

IÂ²/Î±

D)

I Î±Â½

Correct Answer : Option (A) : I Î±

14 .

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

A)

N/mÂ²

B)

N/mÂ³

C)

kg/mÂ³

D)

None of the above

Correct Answer : Option (B) : N/mÂ³

15 .

The SI unit of the force is

A)

Erg

B)

Newton

C)

Joule

D)

Kilogrames

Correct Answer : Option (B) : Newton

16 .

In SI system, the unit of temperature, is

A)

Kelvin

B)

Degree Celsius

C)

Degree centigrade

D)

Degree Fahrenheit

Correct Answer : Option (A) : Kelvin

17 .

Hertz (H_z) is used to express

A)

power

B)

Luminous intensity

C)

electric current intensity

D)

frequency

Correct Answer : Option (D) : frequency

18 .

Candela (Cd) is used to express

A)

power

B)

frequency

C)

luminous intensity

D)

electric current intensity

Correct Answer : Option (C) : luminous intensity

19 .

Joule or Newton metric is used for

A)

Work

B)

Torque

C)

Energy

D)

All of the above

Correct Answer : Option (D) : All of the above

20 .

Stress in SI units is expressed in

A)

kg per sq cm

B)

Newton per sq m

C)

Newton per sq mm

D)

Newton per sq cm

Correct Answer : Option (B) : Newton per sq m

21 .

The basic quantity in the International system of units, is

A)

electric current

B)

length and mass

C)

time and temperature

D)

All of the above

Correct Answer : Option (D) : All of the above

Explanation : * electric current
* length and mass
* time and temperature
* mole and light intensity

22 .

Intensity of electric current is expressed in

A)

amperes

B)

volts

C)

watts

D)

joules

Correct Answer : Option (A) : amperes

23 .

The solid angles are measured in

A)

grades

B)

radians

C)

degrees

D)

steradians

Correct Answer : Option (D) : steradians

24 .

10^-12, is called

A)

Giga

B)

pico

C)

Mega

D)

Terra

Correct Answer : Option (B) : pico

25 .

Pick up the correct statement from the following :

A)

The units of moment of inertia of a plane area, depends upon the units of the area and the length

B)

The moment of inertia is expressed in m4 if the area is in square metres and the length is also in metres

C)

The moment of inertia is expressed in cm4 if the area is in square centimetres and the length in centimetres

D)

All of the above

Correct Answer : Option (D) : All of the above

Explaination : * The units of moment of inertia of a plane area, depends upon the units of the area and the length
* The moment of inertia is expressed in m4 if the area is in square metres and the length is also in metres
* The moment of inertia is expressed in cm4 if the area is in square centimetres and the length in centimetres
* The moment of inertia is expressed in mm4 if the area is in square millimetres and the length in millimetres

26 .

The thickness of a micron, is

A)

10â»Â³ m

B)

10â»â¶ m

C)

10â»â¹ m

D)

10â»Â¹Â² m

Correct Answer : Option (B) : 10â»â¶ m

27 .

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 the above

Correct Answer : Option (C) : M.K.S. units

28 .

In SI units, moment is expressed as

A)

kg-m

B)

kg-cm

C)

kg-mm

D)

All of the above

Correct Answer : Option (D) : All of the above

29 .

N-s/mÂ² is used in S.I. system for

A)

Dynamic viscosity

B)

Mass density

C)

Weight density

D)

Kinematic viscosity

Correct Answer : Option (A) : Dynamic viscosity

30 .

Basic unit of thermodynamic temperature, is

A)

degree absolute

B)

degree kelvin

C)

degree fahrenheit

D)

degree centigrade

Correct Answer : Option (B) : degree kelvin

31 .

The bar used for defining the standard metre at the International office of weights and measures at Sevres near Paris, is composed of

A)

60% platinum and 40% iridium

B)

70% platinum and 30% iridium

C)

80% platinum and 20% iridium

D)

90% platinum and 10% iridium

Correct Answer : Option (D) : 90% platinum and 10% iridium

32 .

The fundamental units in S.I. System are :

A)

Foot, pound, second

B)

Metre, kilogram, second

C)

Centimetre, gram, second

D)

Kilometre, kilogram, minute

Correct Answer : Option (B) : Metre, kilogram, second

33 .

Angular acceleration is expressed as

A)

m/sÂ²

B)

w/sÂ²

C)

rad/sÂ²

D)

rad/s

Correct Answer : Option (C) : rad/sÂ²

34 .

One Newton force produces an acceleration of

A)

1 m/secÂ² while acting on a body of 1 kg mass

B)

1 m/secÂ² while acting on a body of 1 gm mass

C)

1 cm/secÂ² while acting on a body of 1 kg mass

D)

1 cm/secÂ² while acting on a body of 1 gm mass

Correct Answer : Option (A) : 1 m/secÂ² while acting on a body of 1 kg mass

35 .

The unit kg/mÂ³ is used for

A)

volume

B)

force

C)

pressure

D)

density

Correct Answer : Option (D) : density