Question 1.
The atmospheric air is held to the Earth by :
A. Gravity
B. Winds
C. Clouds
D. Rotation of the Earth
Ans: A. Gravity
Question 2.
Anemometer is an instrument meant for measuring __
A. Velocity
B. Air masses
C. Wind speed
D. Temperature
Ans: C. Wind speed
Question 3.
Hydraulic machines work under the Principle of :
A. Newton’s Law
B. Joules Law
C. Pascal’s Law
D. Floatation Law
Ans: C. Pascal’s Law
Question 4.
The sudden fall of atmospheric pressure indicates
A. Fair weather
B. Storm
C. Rain
D. Cold weather
Ans: B. Storm
Question 5.
The pressure of a fluid varies with depth h as P = PQ+pgh, where p is the fluid density. This expression is associated with
A. Pascal’s law
B. Newton’s law
C. Bernoulli’s principle
D. Archimedes’ principle
Ans: A. Pascal’s law
Question 6.
A fountain pen works on the principle of
A. Flow of liquids from higher to lower potential
B. Capillary action
C. Bernoulli’s principle
D. Viscosity of liquids
Ans: B. Capillary action
Question 7.
Alcohol is more volatile than water because __ is lower than water.
A. Its boiling point
B. Its density
C. Its viscosity
D. Its surface tension
Ans: A. Its boiling point
Question 8.
Hydraulic brakes in automobile work on
A. Poiseuille’s principle
B. Pascal’s principle
C. Archimedes’ principle
D. Bernoulli’s principle
Ans: B. Pascal’s principle
Question 9.
A parachute descends slowly whereas a stone dropped from the same height falls rapidly, because
A. Stone is heavier than parachute
B. Special mechanisms are present in parachute
C. A parachute has a larger surface area and air resistance is more
D. None of these
Ans: C. A parachute has a larger surface area and air resistance is more
Question 10.
A barometer is kept inside a bell jar. Air is slowly pumped out of the jar.
A. The mercury level starts rising
B. The mercury level starts falling
C. The mercury level does not change
D. The bell jar breaks up
Ans: A. The mercury level starts rising
Question 11.
A manometer is used to measure
A. Earthquake
B. Pressure
C. Temperature
D. Density
Ans: B. Pressure
Question 12.
When the barometer reading dips suddenly, it is an indication of
A. Hot weather
B. Calm weather
C. Storm
D. Dry weather
Ans: C. Storm
Question 13.
Why does bleeding occur through the nose in high mountainous regions ?
A. The pressure of blood in capillaries is greater than the outside pressure
B. The pressure at high altitudes is greater than that on the plains
C. The blood pressure of a person increases at high altitudes
D. The blood pressure fluctuates and finally decreases drastically
Ans: C. The blood pressure of a person increases at high altitudes
Question 14.
The temperature at which water boils depends mainly on
A. Air Pressure
B. Specific heat
C. Density
D. Relative humidity
Ans: A. Air Pressure
Question 15.
Anemometer is used to measure
A. Wind direction
B. Wind velocity
C. Pressure gradient
D. Wind speed and time
Ans: B. Wind velocity
Question 16.
A storm is predicted if atmospheric pressure
A. Rises suddenly
B. Rises gradually
C. Falls suddenly
D. Falls gradually
Ans: C. Falls suddenly
Question 17.
Which of the following instruments is used to measure humidity ?
A. Kata Thermometer
B. Anemometer
C. Sling Psychrometer
D. Clinical Thermometer
Ans: C. Sling Psychrometer
Question 18.
Air pressure is measured in which of the following units?
A. Steridian
B. Kg/mts
C. Newton
D. Pascal
Ans: D. Pascal
Question 19.
The instrument used to measure the speed of the wind is
A. Altimeter
B. Anemometer
C. Chronometer
D. Dosimeter
Ans: B. Anemometer
Question 20.
On which principle does the hydraulic lift works?
A. Newton’s law
B. Pascal’s law
C. Archimedes’s law
D. Joule’s law
Ans: B. Pascal’s law
Physics GK MCQs all set
- Physics MCQs Set-1
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