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SI Units MCQ

The fundamental units in S.I. System are:

Metre, kilogram, second

Foot, pound, second

Kilometre, kilogram, minute

None of these.

Centimetre, gram, second

Answer

Correct Answer: Metre, kilogram, second

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One Newton is equivalent to

0.97125 kgf

0.10197 kgf

9.80665 kgf

0.20197 kgf

Answer

Correct Answer: 0.10197 kgf

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The SI unit of the force is

Joule

Newton

Erg

Kilogrames

Answer

Correct Answer: Newton

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

60% platinum and 40% iridium

90% platinum and 10% iridium

70% platinum and 30% iridium

50% platinum and 50% iridium

80% platinum and 20% iridium

Answer

Correct Answer: 90% platinum and 10% iridium

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Pick the correct statement from the following:

The moment of inertia is expressed in mm4 if the area is in square millimetres and the length in millimetres

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

All these

Answer

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

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100 kN/m2 pressure is equal to

1 mm Hg

1 atm

1 m bar

1 bar

Answer

Correct Answer: 1 bar

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

0.07013 N/m2

9.81 N/m2

47.88 N/m2

4.882 N/m2

Answer

Correct Answer: 9.81 N/m2

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The unit kg/m3 is used for

Pressure.

Volume

Density

Force

Answer

Correct Answer: Density

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One Newton force produces an acceleration of

1 cm/sec2 while acting on a body of 1 gm mass

1 m/sec2 while acting on a body of 1 kg mass

1 m/sec2 while acting on a body of 1 gm mass.

1 cm/sec2 while acting on a body of 1 kg mass

Answer

Correct Answer: 1 m/sec2 while acting on a body of 1 kg mass

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10-12, is called

Pica

Giga

None of these.

Mega

Terra

Answer

Correct Answer: Pica

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Pick up the correct statement from the following:

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

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

In S.I. system, surface tension is expressed in Newton per metre

All these

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

Answer

Correct Answer: In S.I. system, force is expressed in Newtons

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M2/s is used in S.I. system for

Kinematic viscosity

Power.

Surface tension

Pressure

Answer

Correct Answer: Kinematic viscosity

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

Kg/m3

N/m3

M3/s

Answer

Correct Answer: Kg/m3

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Joule or Newton metric is used for

Work

Torque

Energy

All these.

Answer

Correct Answer: All these.

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Intensity of electric current is expressed in

Volts

Joules.

Watts

Amperes

Answer

Correct Answer: Amperes

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One Netwon force equals

102 dynes

103 dynes

104 dynes

105 dynes

Answer

Correct Answer: 105 dynes

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The basic quantity in the International system of units, is

Length and mass

All these

Mole and light intensity

Time and temperature

Electric current

Answer

Correct Answer: Length and mass

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

Kinematic viscosity

Weight density.

Dynamic viscosity

Mass density

Answer

Correct Answer: Dynamic viscosity

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The thickness of a micron, is

10-12 m

10-3 m

10-6 m

10-9 m

Answer

Correct Answer: 10-6 m

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Candela (Cd) is used to express

Power

Frequency.

Electric current intensity

Luminous intensity

Answer

Correct Answer: Luminous intensity

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