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Free download in PDF Units and Measurements Multiple Choice Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
(1)
There are 20 divisions in 4 cm of the main scale. The vernier scale has 10 divisions. The least count of the instrument is
[A]
0.05 cm
[B]
0.5 cm
[C]
5.0 cm
[D]
0.005 cm
(2)
Electron volt is a unit of
[A]
Charge
[B]
Potential difference
[C]
Energy
[D]
Magnetic Force
(3)
The equation of state of some gases can be expressed as Vander wal equation i.e.
(P + a/v2)(V – b) = RT
Where P is the pressure, V is the volume, T is the absolute temperature and a, b, R are
constants. The dimensions of ‘a’ are:
[A]
[M1L1T-1]
[B]
[M1L-5T1]
[C]
[M2L5T-1]
[D]
[M1L5T-2]
(4)
Which of the following pairs has the same dimensions?
[A]
Specific Heat and Latent Heat
[B]
Impulse and Momentum
[C]
Surface Tension and Force
[D]
Moment of Inertia and Torque
Answer: Impulse and Momentum
(5)
One watt hour contains how many joules?
[A]
3.6 ✕ 108 J
[B]
3.6 ✕ 102 J
[C]
3.6 ✕ 103 J
[D]
10-3 J
(6)
At 4° C, the density of water is equal to
[A]
103 kg m-3
[B]
10-3 kg m-3
[C]
10-2 kg m-3
[D]
10 kg m-3
(7)
The dimensions of Kinetic energy is same as that of
[A]
Force
[B]
Pressure
[C]
Work
[D]
Momentum
(8)
The surface tension of a liquid is 70 dyne/cm. In MKS system its value is?
[A]
70 N/m
[B]
7 ✕ 10-2 N/m
[C]
7 ✕ 102 N/m
[D]
7 ✕ 103 N/m
(9)
The dimensional formula for Planck’s constant is
[A]
[MLT]
[B]
[ML2T-1]
[C]
[M2L2T-1]
[D]
[ML1T-1]
(10)
Light year is a unit of
[A]
time
[B]
distance
[C]
sunlight intensity
[D]
mass
(11)
What is the unit for measuring the amplitude of a sound?
[A]
Decibel
[B]
Coulomb
[C]
Hum
[D]
Cycles
(12)
One fathom is equal to
[A]
6 feet
[B]
100 cm
[C]
60 feet
[D]
6 meters
(13)
Light year is a measurement of
[A]
Speed of aeroplanes
[B]
Speed of light
[C]
Stellar distances
[D]
Speed of rockets
Answer: Stellar distances
(14)
One kilometer is equal to how many miles?
[A]
0.84
[B]
0.5
[C]
1.6
[D]
0.62
(15)
'Bar' is the unit of
[A]
Temperature
[B]
Heat
[C]
Atmospheric pressure
[D]
Current
Answer: Atmospheric pressure
(16)
Nautical mile is a unit of distance used in
[A]
Navigation
[B]
Road mile
[C]
Astronomy
[D]
Measuring the boundaries of a nation
(17)
How many Dynes are there in 1 gram weight?
[A]
900
[B]
375
[C]
981
[D]
250
(18)
Joule is the unit of
[A]
Temperature
[B]
Pressure
[C]
Energy
[D]
Heat
(19)
[ML-1T-2] is the dimensional formula of
[A]
force
[B]
coefficient of friction
[C]
modulus of elasticity
[D]
energy
Answer: modulus of elasticity
(20)
The dimensional formula of coefficient of viscosity is
[A]
[MLT-1]
[B]
[M-1L2T-2]
[C]
[ML-1T -1]
[D]
none of these
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