Meteorology

#1 The wind at 1200 ft agl is 30 kt and at 1000 ft agl it is 10 kt. As an aircraft descends through the affected layer it will experience:

Horizontal wind shear, airspeed and rate of descent will reduce and the angle of descent will steepen

Vertical wind shear, airspeed will reduce but rate of descent and angle of descent are not affected

Vertical wind shear, airspeed will reduce, rate of descent will increase and angle of descent will steepen

Horizontal wind shear, airspeed will reduce, rate of descent will increase and angle of descent will steepen

#2 The amount of water vapour that can be held in the atmosphere depends on the air’s

Temperature, in that colder air can contain more water vapour than warm air.

Pressure, in that air at high pressure can hold more water vapour than air at low pressure.

Temperature, in that warmer air can contain more water vapour than cold air.

Pressure, in that air at low pressure can hold more water vapour than air at high pressure

#3 What is the effect of an increase in temperature in temperature on atmospheris density and pressure lapse rate

both air density and pressure lapse rate increase

air density increases and pressure lapse rate decreases

air density decreases and pressure lapse rate increases

both air density and pressure lapse rate decreases

#4 Fog is defined as a concentrated suspension of very small water droplets causing horizontal ground visibility below

100m

500m

1000m

5000m

#5 The term NOSIG appears in a landing (TREND) forecast. What is the meaning of this term in New Zealand?

No significant weather is expected during the two hours following the issue time of the TAF or METAR

No significant change from the reported weather is expected during the next one hour following the issue time of the METAR or TAF

No significant change from the reported weather is expected during the next two hours following the issue time of the METAR or SPECI

No significant weather is expected during the three hours following the issue time of the METAR or SPECI

#6 As a vigorous cold front passes there is usually:

an increase in temperature and a considerable change in wind direction

a decrease in temperature and a considerable change in wind direction

an increase in temperature but no change in wind direction

a decrease in temperature but no change in wind direction

#7 Dew point is defined as:

the percentage ratio of the amount of water vapour actually present in a parcel of air to the amount which would be needed to saturate it

the temperature at which a parcel of moist air would become saturatered if cooled at a constant pressure

the percentage ratio of the amount of water vapour to the amount of dry air contained in a parcel of air

the temperature at which all the water vapour in a parcel of air would condense into liquid of solid form

#8 Identify this cloud type

Stratus

Nimbostratus

Cumulus

Cumulonimbus

#9 A condition where the air temperature at a given height is warmer than that at a lower level is referred to as:

an inversion and is an indication of unstable weather

an inversion and you would expect smooth flying conditions immediately above the inversion

a reverse temperature condition and you would expect very good flight visibility below the temperature reversal

an inversion, and you would expect very good flight visibility below the inversion

#10 Why does rising saturated air cool less rapidly than rising dry air?

Condensed water vapour absorbs heat from the sun

Heat is released during the condesation of water vapour

Moist air rises faster and thus retains its heat to a greater altitude

Condensed water vapour cools more slowly than gaseous water vapour

#11 A fohn wind is:

cool and wet

dry and warm

wet and warm

caused by lenticular cloud

#12 Which choice correctly lists the characteristics of pressure systems in the southern hemisphere?

A high has anticlockwise circulation, pressure decreases as you move away from the centre and high level convergence takes place

A low has clockwise circulation, pressure decreases as you move away from the centre and surface divergence takes place

A high has anticlockwise circulation, pressure increases as you move away from the centre and surface convergence takes place.

A low has clockwise circulation, pressure increases as you move away from the centre and high level convergence takes place

#13 That type of suface is associated with the strongest katabatic wind?

A gentle slope covered in snow

A gentle slope of bare ground or rock

A steep slope covered with snow

A steep slope of bare ground or rock

#14 The passage of a cold front over a station is characterised by:

Decrease in pressure and decreasing temperature before the front, a lower dew point and poor visibility after the front.

Backing of the wind and a drop in temperature at the front, a higher dew point after the front

Steady pressure and decreasing temperature before the front and fair visibility, outside showers and rain, after the front

Decrease in pressure and steady temperature before the front, backing of the wind at the front and good visibility, outside showers, after the front

#15 When the pressure gradient is reported as ‘steep’, it means that

Pressure falls of rapidly with height

There is a large pressure change with horizontal distance, isobars are closely spaced

Pressure falls off slowly with height

There is a small pressure change with horizontal distance, isobars are widely spaced

#16 Which correctly describes changes involving relative humidity and dewpoint during a cloudless sunny day:

relative humidity is maximum at mid afternoon and dewpoint is minimum

relative humidity is minimum at mid afternoon and dewpoint is maximum

relative humidity is maximum at the mid afternoon and dewpoint remains constant

relative humidity is minimum at mid afternoon and dewpoint remains constant

#17 An air mass conforming in pressure and temperature to the ISA would be unstable at sea level when it was

dry only

both dry and saturaterd

saturated only

neither dry nor saturated

#18 Complete the following sentence from the options below. In the southern hemisphere the surface wind tends to ……………….. and …………….. at night

decrease, veer

decrease, back

increase, veer

increase, back

#19 With strong up and down draughts identify this stage of a thunderstorm

The formative

The growing stage

The mature stage

The decaying stage

#20 In the southern hemisphere, when the Coriolis force acting on a balanced flow is greater than the pressure gradient, air will flow

Clockwise around an area of high pressure

Anticlockwise around an area of high pressure

Clockwise around an area of low pressure

Anticlockwise around an area of low pressure

#21 What is the adiabatic temperature lapse rate per thousand feet of rising dry air?

1.5°C

2°C

2.7°C

3°C

#22 You are on approach to land at an airfield where substantial windshear has been reported on final. Your response to this would be to:

maintain approach speed and increase power

increase approach speed using power to maintain profile

continue with a normal approach

reduce approach speed and increase power

#23 Supercooled water droplets do not change to ice instantly when disturbed because the freezing process is delayed by the release of:

Specific heat

Latent heat

Sensible heat

Radiative heat

#24 Isobars are lines drawn on a weather map joining places:

where wind direction is the same

of equal barometric pressure

where the wind speed is the same

of equal temperature

#25 The maximum amount of water vapour that can be held by an air mass is determined by the:

dew point

density

humidity

temperature

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