Crowdly

When flying on the northern hemisphere under tailwind conditions (cross wind component zero), which statement is correct regarding the location of pressure systems in relation to your flight path?

A low pressure area is on your left.

A low pressure area is on your right.

You are flying towards an area of high pressure.

You are flying towards an area of low pressure.

Which of the following statements is correct regarding the variation of wind with height?

The wind strength normally increases by a factor of 2 per 1000 feet up to the 850 hPa level.

The wind normally backs during climb out through the first 2000-3000 feet in the northern hemisphere.

The wind strength normally increases by a factor of 2 per 500 feet up to the 700 hPa level.

The wind normally veers during climb out through the first 2000-3000 feet in the northern hemisphere.

If the pressure surfaces bulge upwards in all levels then the pressure system is a:

cold high.

warm low.

cold low.

warm high.

Amongst others, what has to be expected when a warm air mass covers a cold surface?

Development of stratiform clouds.

Increasing stability of air layers near the surface.

Development of an inversion at high level.

Development of a cold air drop.

Which is favourable for the lifting of air and the formation of clouds and precipitation?

Convergence near the ground.

Convergence aloft.

Vertically increasing convergence.

Vertically decreasing divergence.

What is the approximate composition of the dry air by volume in the troposphere?

50% oxygen, 40% nitrogen, and the rest other gases.

10% oxygen, 89% nitrogen, and the rest other gases.

21% oxygen, 78% nitrogen, and the rest other gases.

88% oxygen, 9% nitrogen, and the rest other gases.

which may give drizzle or snow grains. When the sun is visible through the cloud, the outline is clearly discernible.

What type of cloud is being described? A generally grey cloud layer with fairly uniform base and uniform appearance,

Sometimes it appears in the form of ragged patches.

Cirrostratus

stratus

Nimbostratus

Altostratus

What happens as air is cooled to below its dew point temperature?

The saturated water vapor content increases as precipitation takes place when the temperature drops.

The actual water vapor content decreases to remain equal to the saturated water vapor content.

The saturated water vapor content remains constant as the air is at 100% relative humidity.

The actual water vapor content increases to remain equal to the saturated water vapor content.

Which of the following sets of conditions are most likely to lead to the formation of advection fog?

Clear skies at night over an inland marshy area

A mild moist airstream flowing over colder surfaces with a wind in excess of 30 kt

Cold maritime air flowing over a warmer land surface at a speed greater than 15 kt

A mild moist airstream flowing over colder surfaces with the wind speed less than 15 kt