Practice Units and MeasurementRRB PYQ questions from Railway examinations, including RRB NTPC PYQ, RRB Group D PYQ, RRB JE PYQ, RRB ALP PYQ and RRB Technician PYQ. This topic-wise Physics question set covers important concepts related to Units and Measurement, helping you revise essential Physics concepts and understand the types of questions asked in RRB examinations.
Each question includes the correct answer and an explanation to help you understand the concept, strengthen your Physics fundamentals, and revise important Heat topics for RRB Railway examinations.
Start practicing Units and MeasurementRRB PYQs and strengthen your Physics preparation
21
Unit used for measuring the sound is
RRB NTPC; RRB NTPC
2016; 2016
✓ Answer:ADecibel
The decibel is a commonly used unit for sound intensity or sound level.
22
Which of the following quantities is measured using the unit 'Quintal'?
RRB RPF Constable
2025
✓ Answer:CMass
A quintal is a mass unit equal to 100 kg.
23
Newton is the unit to measure
RRB NTPC
2021
✓ Answer:BForce
Newton is the SI derived unit of force, equal to kg·m·s^-2.
24
Which of the following units is used to measure the intensity of sound?
RRB NTPC
2021
✓ Answer:CDecibel
The decibel is used to express sound intensity level.
25
Which unit of electrical power is commonly used to measure household energy consumption?
RRB JE (Stage-I); RRB Group D
2024; 2018
✓ Answer:CKilowatt-hour
Electricity consumption is billed in kilowatt-hours (kWh), a unit of energy.
26
The SI unit of sound wave frequency was named in honour of which physicist?
RRB NTPC
2021
✓ Answer:BHeinrich Rudolf Hertz
The unit hertz (Hz) was named in honour of German physicist Heinrich Rudolf Hertz.
27
Which of the following units is used for measuring the amount of a substance?
RRB NTPC
2020
✓ Answer:BMole
Mole is the SI base unit for amount of substance.
28
The SI unit for measuring very large distance, such as astronomical distances, is
A light-year is the distance light travels in one year and is commonly used for very large astronomical distances.
29
The work done by a force acting on an object is equal to the amount of force multiplied by the distance travelled in the direction of the force. Which of the following is NOT a unit of work?
RRB NTPC
2021
✓ Answer:Akg m/s^2
kg·m/s² is a newton, the unit of force. Work is N·m or J, equivalent to kg·m²/s².
30
What is the SI unit of amount of substances?
RPF Constable
2019
✓ Answer:BMole
The mole is the SI base unit for amount of substance.
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