The maximum risk to air travel is from?

A. Clouds
B. Rainfall
C. Fogs
D. Strong Winds

Submitted by: Syed Nizakat Ali Shah

Mist and Fog are the terms used to describe low visibility caused by water droplets suspended in the air. Mist is a term used to describe visibility of greater than 1 km while Fog is the term used when visibility is less than 1 km.

Fog is effectively surface cloud and has a significant impact on the conduct of flying operations, particularly landing and take-off.

Related Mcqs:

When sound waves travel from air to water which of the following quantities remains unchanged?
A. Speed
B. Frequency
C. Intensity
D. Wavelength
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Sound cannot travel through __________
A. Solid
B. Liquid
C. Gases
D. Vaccum
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Earthquake waves travel faster in __________?
A. Water
B. Flexibl rock
C. Air
D. Soil
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Quantity of fresh air required for a man is 1000 cubic feet of air for every____________?
A. 5 minutes
B. 10 minutes
C. 15 minutes
D. 20 minutes
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During which process of energy exchange does cold air displace warmer air?
A. Convection
B. Radiation
C. Conduction
D. None of these
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Brass gets discoloured in air because of the presence of which of the following gases in air ________ ?
A. Carbon dioxide
B. Oxygen
C. Nitrogen
D. Hydrogen sulphide
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Air contains maximum amount of__________?
A. oxygen
B. nitrogen
C. hydrogen
D. carbon dioxide
Submitted by: ABDUL HAYEE
Which form of drug abuse involves most risk of infection with the HIV (AIDS) virus ?
A. Cigarette smoking
B. Using alcholo
C. Injection of heroine
D. Taking too much aspirin
E. None of these
It is observed that the total pressure exerted by air on the man of average size is around 14.7 lb wt. per square inch. But the man feels quite comfortable,. It is because of__________?
A. An equal and opposite pressure acts from inside
B. of the height of a man
C. of gravity
D. Earth pulls the man upward
E. None of these
Submitted by: Zeeshan Rafique Soomro
Velocity of sound in air does not change with the change of?
A. Temperature of air
B. Pressure of air
C. Moisture content in air
D. Wind in the direction of propagation of sound
Submitted by: Malik Asghar Hussain