31000+ Important MCQs for CDS

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Learn CDS MCQs with answers [Page 20 of Department 111]

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Neha Sharma • 6.85K Points
Tutor III Physics

193) A vacuum cleaner works on the principle of pressure difference. On the moon it will

  • (A) Work as efficiently as on the earth
  • (B) Not work at all
  • (C) Work with reduced efficiency
  • (D) Work with increased efficiency
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Correct Answer - Option (B)

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Neha Sharma • 6.85K Points
Tutor III Physics

194) Middle latitude cyclones are fueled by?

  • (A) Air high in the atmosphere
  • (B) Polar continental air masses
  • (C) Energy from falling precipitation
  • (D) All of the above
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Correct Answer - Option (A)

No Explanation found. Add Explanation and get +2 points.

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Neha Sharma • 6.85K Points
Tutor III Physics

195) Skating on ice is possible because

  • (A) The surface of ice is smooth
  • (B) Ice is cold
  • (C) The pressure on the ice due to skate melts the ice by lowering its melting point forming a thin film of water
  • (D) The pressure on the ice due to skate raises its melting point
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Correct Answer - Option (C)

No Explanation found. Add Explanation and get +2 points.

N

Neha Sharma • 6.85K Points
Tutor III Physics

197) What principle/law explains the working of the hydraulic brakes in automobiles ?

  • (A) Bernoulli's law
  • (B) Posieulle's principle
  • (C) Pascal's law
  • (D) Archimedes' principle
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Correct Answer - Option (C)

No Explanation found. Add Explanation and get +2 points.

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Neha Sharma • 6.85K Points
Tutor III Physics

198) Air moves from the region where the air ________

  • (A) Humidity is high to the region where the humidity is low
  • (B) Pressure is low to the region where the pressure is high
  • (C) Pressure is high to the region where the pressure is low
  • (D) Humidity is low to the region where the humidity is high
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Correct Answer - Option (C)

No Explanation found. Add Explanation and get +2 points.

N

Neha Sharma • 6.85K Points
Tutor III Physics

199) Transverse waves can propagate

  • (A) Both in a gas and in a metal
  • (B) In a gas but not in a metal
  • (C) Not in a gas but in a metal
  • (D) Neither in a gas nor in a metal
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Correct Answer - Option (C)

No Explanation found. Add Explanation and get +2 points.

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