SAFA Sample Exam 817 -Meteorology

How is mean sea level pressure obtained?

• By measurement at a particular station with a barometer.

• By adding to the station pressure the weight of an imaginary column of air extending from the station to MSL.

• Choice b), based on the average temperature for the last 24 hours.

• Choice b), based on the average temperature for the last 12 hours.

A change of pressure of 0.10 inch of Hg indicates a change of altitude of _____ feet (foot).

• 1.

• 10.

• 100

• 1,000.

If an altimeter setting of 29.60" Hg is used and the actual pressure at sea level or the correct altimeter setting is 28.40" Hg, when the indicated altitude is 5,000 feet ASL, the actual altitude will be

• 5,000 feet ASL.

• 3,800 feet ASL.

• 1,200 feet ASL.

• 600 feet ASL.

An increase of temperature with height is

• an inversion.

• an isothermal layer.

• a steep lapse rate.

• a normal lapse rate.

The temperature at which a sample of air must be cooled for it to become saturated is

• relative humidity

• dewpoint

• lapse rate

• saturation event

Clouds classified as HIGH have bases above

• 10,000 feet

• 15,000 feet

• 20,000 feet

• 25,000 feet

Mechanical turbulence is the result of:

• unequal heating of he Earth's atmosphere.

• friction between the air and the ground.

• the adiabatic lapse rate.

• vapour changing state.

Vertical wind shear will be found

• where there is a strong temperature inversion or thunderstorms.

• in areas of thunderstorms, passing fronts or mountain waves.

• where there is a strong temperature inversion or mountain waves.

• only in areas of intense downbursts associated with thunderstorm.

Where a warm front passes a station, there will be a(n) __________ in temperature, __________ in pressure and the dewpoint temperature will ____________ .

• decrease, decrease, decrease

• increase, decrease, increase

• increase, increase, decrease

• decrease, decrease, increase

Which of the following statements are true in respect of rime ice?

1. It is light and feathery.

2. It extends back from the leading edge as it forms.

3. It moves forward from the leading edge as it forms.

4. It forms when temperatures are just below 0°C.

5. It forms when temperatures are well below freezing.

6. It has a rapid rate of accumulation.

7. It has a gradual rate of accumulation.

8. It is clear.

9. It is opaque.

• 1, 3, 5, 7, 9.

• 2, 4, 6, 8.

• 3, 5, 7, 8.

• 3, 5, 6, 9.