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PHYSICS MCQs

Total Questions : 3767 | Page 66 of 377 pages
Question 651. When a barometer reading suddenly recedes, it indicates that climate–
  1.    Will be very warm
  2.    Will be extremely stormy
  3.    Will remain cold
  4.    Incessant rain for at least 48
 Discuss Question
Answer: Option B. -> Will be extremely stormy
Question 652. When a barometer is rising air pressure is
  1.    Increasing
  2.    Decreasing
  3.    Constant
  4.    Zero
 Discuss Question
Answer: Option A. -> Increasing
Question 653. The pressure exerted by a 760 mm column of mercury at 0°C is known as
  1.    1 pascal
  2.    1 atmosphere
  3.    1 bar
  4.    1 poise
 Discuss Question
Answer: Option A. -> 1 pascal
Question 654. If a barometric reading is falling, this usually indicates what
  1.    Increasing pressure
  2.    Decreasing pressure
  3.    No pressure
  4.    None
 Discuss Question
Answer: Option B. -> Decreasing pressure
Question 655. Reading of a barometer going down is an indication of
  1.    Storm
  2.    Rainfall
  3.    Snow
  4.    Intense heat
 Discuss Question
Answer: Option B. -> Rainfall
Question 656. Increased wind speed is accompanied by a reduced air ________
  1.    Humidity
  2.    Pressure
  3.    Density
  4.    Aridity
 Discuss Question
Answer: Option B. -> Pressure
Question 657. A vacuum cleaner works on the principle of pressure difference. On the moon it will
  1.    Work as efficiently as on the earth
  2.    Not work at all
  3.    Work with reduced efficiency
  4.    Work with increased efficiency
 Discuss Question
Answer: Option B. -> Not work at all
Question 658. Middle latitude cyclones are fueled by?
  1.    Air high in the atmosphere
  2.    Polar continental air masses
  3.    Energy from falling precipitation
  4.    All of the above
 Discuss Question
Answer: Option A. -> Air high in the atmosphere
Question 659. Skating on ice is possible because
  1.    The surface of ice is smooth
  2.    Ice is cold
  3.    The pressure on the ice due to skate melts the ice by lowering its melting point forming a thin film of water
  4.    The pressure on the ice due to skate raises its melting point
 Discuss Question
Answer: Option C. -> The pressure on the ice due to skate melts the ice by lowering its melting point forming a thin film of water
Question 660. Why is it difficult to breathe at higher altitudes?
  1.    Due to low air pressure
  2.    Due to low temperature
  3.    Due to ozone
  4.    Due to high humidity
 Discuss Question
Answer: Option A. -> Due to low air pressure

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