# Physics Questions for SSC CGL Exam

We are providing the alternate quizzes on Chemistry/Biology/Physics. From this section you will get at least 7-8 questions in SSC CGL Exam. So from this quiz one can prepare general science section on daily basis.

Q1. The hair of shaving brush clings together when removed from water due to—
(a) surface tension
(b) viscosity
(c) elasticity
(d) friction
Ans.(a)

Q2. Ventilators are provided near the ceiling of the room, because
(a) the exhaled warmer air rises up and goes out
(b) these provide cross ventilation in the room
(c) these provide some sunlight in the room
(d) these do not look nice in the lower part
Ans.(a)

Q3. An oil drop spreads over water, because
(a) oil is lighter than water
(b) oil is more viscous
(c) oil does not mix with water
(d) surface tension of oil is much lesser than that of water
Ans.(d)

Q4. Which of the following liquids is the most viscous?
(a) Oil
(b) Milk
(c) Water
(d) Petrol
Ans.(a)

Q5. What happens to the surface tension of water on adding detergent to it?
(a) increases
(b) decreases
(c) no change
(d) becomes zero
Ans.(b)

Q6. Surface tension in a liquid is due to—
(b) cohesive force between molecules
(c) gravitational force between molecules
(d) electric force between molecules
Ans.(b)

Q7. If the diameter of a capillary is doubled, then the rise of water in it will be—
(a) two times
(b) half
(c) four times
(d) no change
Ans.(b)

Q8. In which medium, velocity of sound is maximum?
(a) Metals
(b) Air
(c) Water
(d) Polymer
Ans.(a)

Q9. The sound produced by a bat is—
(a) audible
(b) subsonic
(c) infrasonic
(d) ultrasonic
Ans.(d)

Q10. To measure the speed of an approaching car a police officer shines—
(a) light waves on it
(b) microwaves on it
(d) ultra-high frequency waves on it
Ans.(c)

Q11. In severe winter, in cold countries water pipes burst because—
(a) water expands on freezing
(b) contraction of water pipes
(c) high atmospheric pressure
(d) combined effect of all the above three
Ans.(a)

Q12. Which of the following produces more severe burns?
(a) Boiling water
(b) Hot water
(c) Steam
(d) Melting icebergs
Ans.(c)

Q13. ‘Cryogenics’ is a science dealing with which of the following?
(a) high temperatures
(b) low temperatures
(c) friction and water
(d) growth pf crystals
Ans.(b)

Q14. A gas thermometer is more sensitive than a liquid thermometer because a gas—
(a) is lighter than liquid
(b) expands more than a liquid
(c) is easy to obtain
(d) does not change state easily
Ans.(b)

Q15. Woolen clothes keep the body warm because—
(a) wool increases the temperature of the body
(b) wool is a bad conductor of heat
(c) wool absorbs radiant heat from outer object
(d) wool rejects heat from the outer objects
Ans.(b)

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