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Units & Measurements Top MCQs – 5

Lux is the SI unit of
(A) Intensity of illumination
(B) Luminous efficiency
(C) Luminous flux
(D) Luminous intensity
Answer: Option A

Moment of inertia is
(A) Vector
(B) Scalar
(C) Phasor
(D) Tensor
Answer: Option D

One thousand microns is equal to
(A) 10-3 m
(B) 10-6 m
(C) 10-9 m
(D) 10-12 m
Answer: Option A

1 Kilogram = _____ Pound
(A) 2
(B) 2.5
(C) 2.2
(D) 3.5
Answer: Option C

Pa (Pascal) is the unit for
(A) Thrust
(B) Pressure
(C) Frequency
(D) Conductivity
Answer: Option B

One watt-hour is equivalent to
(A) 6.3 × 103 J
(B) 6.3 × 10-7 J
(C) 3.6 × 103 J
(D) 3.6 × 10-3 J
Answer: Option C

A transformer is used to
(A) Increase DC voltage
(B) Increase or decrease AC voltage
(C) Decrease DC voltage
(D) Convert DC into AC
Answer: Option B

Device used to rectify farsightedness is
(A) Concave lens
(B) Convex lens
(C) Spherical lens
(D) Plane glass
Answer: Option B

At what temperature do both the Centigrade and the Fahrenheit thermometers show the same reading?
(A) -20°
(B) -40°
(C) 42°
(D) 0°
Answer: Option B