General Science PYQ – Measurement, Motion and Properties of Matter – Part 1 (Q 1–32)
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Friction between the road and tyres supplies the centripetal force needed for a car to turn on a curved road.
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General Science PYQ – Measurement, Motion and Properties of Matter – Part 1 (Q 1–32) – 32 questions, subject: Science. Every question has the correct answer with a one-line explanation; tap "Show Answer". Free practice for TNPSC, UPSC, SSC, Bank and RRB exams – Shanmugam IAS Academy, Coimbatore.
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1.
PSY 2022
The SI unit for energy isCorrect Answer: C [Nm]
Explanation:
Energy and work share the same unit, and since work is force times displacement, its unit is newton metre (Nm), which is the joule.
2.
Executive Officer Gr. IV (HR&CE) 2022
Newton metre (Nm) is the SI unit ofCorrect Answer: A [Moment of couple]
Explanation:
The moment of a couple is force times perpendicular distance between the forces, so its SI unit is the newton metre (Nm).
3.
Executive Officer Gr. IV (HR&CE) 2022
Which one of the following is the SI unit of temperature?Correct Answer: B [Kelvin]
Explanation:
The SI base unit of temperature is the kelvin (K), while Celsius and Fahrenheit are practical scales.
4.
Hostel Supdt. cum PTO 2024
Intensity of a source of light of a specified frequency, which gives a specified amount of power in a given direction, is measured inCorrect Answer: B [Candela (cd)]
Explanation:
The SI unit of luminous intensity, the power emitted in a given direction by a source of specified frequency, is the candela (cd).
5.
AAO & AHO 2024
The SI unit of pressure isCorrect Answer: D [Pascal]
Explanation:
Pressure is force per unit area, so its SI unit is newton per square metre, called the pascal (Pa).
6.
(a) Pressure – 1. Nm⁻¹
(b) Area – 2. Nm⁻²
(c) Surface tension – 3. N
(d) Force – 4. m²
Fisheries Inspector / SI 2023
Match correctly the physical quantities with their SI units:(a) Pressure – 1. Nm⁻¹
(b) Area – 2. Nm⁻²
(c) Surface tension – 3. N
(d) Force – 4. m²
Correct Answer: C [2 4 1 3]
Explanation:
Pressure is measured in N m^-2, area in m^2, surface tension in N m^-1 and force in N, which gives the match 2 4 1 3.
7.
(i) Force constant and surface tension have same unit and dimensions
(ii) Work and energy have same dimensions and unit
(iii) Force constant and surface tension have different units and dimensions
CTS (ITI Posts) 2025
Which of the following statements are true?(i) Force constant and surface tension have same unit and dimensions
(ii) Work and energy have same dimensions and unit
(iii) Force constant and surface tension have different units and dimensions
Correct Answer: C [(i) and (ii) are correct]
Explanation:
Force constant and surface tension both have unit N m^-1 and the same dimensions, and work and energy have the same unit joule, so statements (i) and (ii) are correct.
8.
GSHA 2021
Which of the following is incorrectly paired?Correct Answer: D [1 Atomic mass unit – 6.17 × 10⁻²⁷ kg]
Explanation:
One atomic mass unit is 1.66 x 10^-27 kg, not 6.17 x 10^-27 kg, so that pair is incorrect.
9.
(1) 10 quintal
(2) 1000 kg
Group 3A 2023
Which of this is the wrong answer? 1 metric tonne is(1) 10 quintal
(2) 1000 kg
Correct Answer: D [Neither (1) nor (2)]
Explanation:
One metric tonne equals 1000 kg, which is 10 quintals, so both statements are correct and neither is wrong.
10.
CTS (ITI Posts) 2024
Which of the following is the wrong value of 1 atm pressure?Correct Answer: C [1.013 kN]
Explanation:
1 atm is 1.013 x 10^5 Pa, 101.3 kPa or 1.013 bar, but kilonewton is a unit of force, so 1.013 kN is a wrong value.
11.
AAO & AHO 2024
Calculate the correct reading, if the main scale reading of a vernier calipers is 8 cm, vernier coincidence is 4 and positive zero error is 0.05 cm.Correct Answer: B [7.99 cm]
Explanation:
Corrected reading is main scale 8 cm plus vernier 4 x 0.01 cm, giving 8.04 cm, minus the 0.05 cm positive zero error, which is 7.99 cm.
12.
AJ 2023
A bus is running at a speed of 55 miles/hour. Write the speed in m/s.Correct Answer: B [24.6 m/s]
Explanation:
55 miles per hour is 55 x 1609.344 m divided by 3600 s, which is about 24.6 m/s.
13.
(a) Hydrometer – 1. density of sugar in liquid
(b) Saccharometer – 2. levels of alcohol in spirit
(c) Lactometer – 3. relative density of liquid
(d) Alcoholometer – 4. creaminess of milk
Road Inspector 2023
Match the following measuring instruments with the physical quantities they can measure:(a) Hydrometer – 1. density of sugar in liquid
(b) Saccharometer – 2. levels of alcohol in spirit
(c) Lactometer – 3. relative density of liquid
(d) Alcoholometer – 4. creaminess of milk
Correct Answer: C [3 1 4 2]
Explanation:
A hydrometer measures relative density of a liquid, a saccharometer sugar content, a lactometer milk quality and an alcoholometer alcohol content, matching 3 1 4 2.
14.
Junior Rehabilitation Officer 2023
The rate of change of velocity isCorrect Answer: B [Acceleration]
Explanation:
Acceleration is the rate of change of velocity, a = (v - u)/t, with unit m s^-2.
15.
Combined Engineering Subordinate Service 2023
Repetitive to and fro motion of an object at regular interval of time about a point isCorrect Answer: C [Oscillatory motion]
Explanation:
Repetitive to-and-fro motion about a fixed point at regular time intervals, as in a pendulum, is oscillatory motion.
16.
AD Co-operation 2022
The path of a particle projected into air with a given velocity in a particular direction is aCorrect Answer: D [Parabola]
Explanation:
A projectile has uniform horizontal velocity and uniform vertical acceleration due to gravity, so its path is a parabola.
17.
Group 2/2A 2024
A force of 1 N acts on a body of mass 10 kg. As a result, the body covers 100 cm in 4 seconds moving along a straight line. Find the initial velocity of the body.Correct Answer: B [5 cm/s]
Explanation:
Acceleration is 1/10 = 0.1 m s^-2, and from s = ut + 1/2 at^2 with 1 m in 4 s, the initial velocity is 0.05 m/s, which is 5 cm/s.
18.
AD Town & Country Planning 2022
Which of the following statements is correct?Correct Answer: A [No material body can exceed the speed of light]
Explanation:
According to special relativity, no material body can reach or exceed the speed of light.
19.
AD Social Welfare 2022
Which of the following is related to Newton's first law?Correct Answer: D [Inertia]
Explanation:
Newton's first law is the law of inertia: a body stays at rest or in uniform motion in a straight line unless an external force acts on it.
20.
Library Service 2023
The inertia of a body depends onCorrect Answer: D [Mass of the body]
Explanation:
Inertia depends only on the mass of a body; the greater the mass, the greater the inertia.
21.
Group 1 2024
Which of the following observations are inertial?Correct Answer: B [A driver in a car moving with a constant velocity]
Explanation:
A frame moving with constant velocity and no acceleration is inertial, so the driver in a car at constant velocity is an inertial observer.
22.
CTS (Interview Posts) 2024
A spin-dryer removes excess water from clothing by rotating a perforated drum at high speed in a washing machine. So the water droplets obeyCorrect Answer: A [Newton's first law]
Explanation:
The drum wall supplies centripetal force to the clothes but not to the water drops, which fly off through the holes due to inertia, as Newton's first law states.
23.
GSASO 2020
A man pulls a trolley weighing 50 kg with a force of 50 N on a marble floor. What is the acceleration of the trolley?Correct Answer: B [1 m s⁻²]
Explanation:
By Newton's second law, acceleration a = F/m = 50 N / 50 kg = 1 m s^-2.
24.
Group 4 2022
Which of the following equations for force is incorrect?Correct Answer: B [F = ΔP × t]
Explanation:
Force equals the rate of change of momentum, F = dp/t = m(v - u)/t = ma, so F = dp x t is incorrect.
25.
Road Inspector 2023
Calculate the velocity of a moving body of mass 5 kg whose linear momentum is 2.5 kg m s⁻¹.Correct Answer: C [0.5 m s⁻¹]
Explanation:
Linear momentum p = mv, so velocity v = p/m = 2.5 / 5 = 0.5 m s^-1.
26.
Field Surveyor 2022
When a force 'F' acts on a body for a period of time 't', then the product of force and time is known asCorrect Answer: C [Impulse]
Explanation:
The product of force and the time for which it acts is impulse, which equals the change in momentum.
27.
CTS (Interview Posts) 2025
The unit of impulse isCorrect Answer: C [Ns]
Explanation:
Impulse is force times time, so its unit is newton second (N s), equal to the momentum unit kg m s^-1.
28.
District Child Protection Officer 2022
When a cricketer hits the ball by his bat, the force exerted by the bat on the ball is ______ force.Correct Answer: C [Impulsive]
Explanation:
A large force acting for a very short time, such as a bat striking a ball, is an impulsive force.
29.
Combined Engineering Services 2022
The vehicles are fitted with shock absorbers, which is based onCorrect Answer: D [Impulse]
Explanation:
Since F = dp/t, increasing the time of a given momentum change reduces the force, which is how shock absorbers work on the impulse principle.
30.
CTS (Interview Posts) 2024
A rocket works on the principle of conservation ofCorrect Answer: C [Linear momentum]
Explanation:
A rocket moves forward as exhaust gases rush backward, conserving total linear momentum.
31.
Combined Accounts Service 2024
A cyclist leans inwards towards the centre of the circular track. Why?Correct Answer: A [To provide sufficient centripetal force]
Explanation:
A cyclist leans inward on a circular track so that the ground's reaction supplies the required centripetal force.
32.
Asst. Public Prosecutor Gr. II 2025
A car is moving on a curved road. Which of the following is provided by the frictional force between road and tyres?Correct Answer: A [Centripetal force]
Explanation:
Friction between the road and tyres supplies the centripetal force needed for a car to turn on a curved road.
? Full explanations with tables – General Science PYQ book (₹149): www.shanmugamiasacademy.in/study-materials/tnpsc-general-science-pyq
📘 TNPSC பொது அறிவு அலகு I — பொது அறிவியல் (General Science) – முழுமையான பாடநூல்
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› General Science PYQ – Computers, Technology and Scientists – Part 2 (Q 27–51)
› General Science PYQ – Computers, Technology and Scientists – Part 1 (Q 1–26)
› General Science PYQ – Scientific Temper and Scientific Method
› General Science PYQ – Genetics, Evolution and Biotechnology – Part 2 (Q 27–52)
› General Science PYQ – Genetics, Evolution and Biotechnology – Part 1 (Q 1–26)
› General Science PYQ – Diseases, Health and Nutrition
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