MET pre-pt 1

Question 1

A warm high will

Answer 1

[increase in intensity with altitude]

Question 2

What pressure system is represented by an upwards bulge at the surface with a downwards bulge at a higher level?

a.Warm low

b.Cold low

c.Warm high

d.Cold high

Answer 2

d.Cold high

Question 3

Regarding the radiation of heat energy:

a.ocean surfaces radiate more energy than land surfaces

b.more energy is radiated at night than during the day

c.warm ground radiates more than cold ground

d.the surface is heated by long wave and cooled by short wave

Answer 3

c. warm ground radiates more than cold ground

Question 4

A student pilot has a training flight in the early morning and also one in the afternoon. The flight instructor asks the student why the morning flight was smoother.

a.There was an inversion present so there was no wind shear

b.The vertical extent of the inversion increased in the afternoon

c.Thermal activity above the inversion was greater in the afternoon

d.There was an inversion present so all convective activity remained below 2000ft

Answer 4

d.There was an inversion present so all convective activity remained below 2000ft

Question 5

ISA +20. Pressure altitude 2500ft. With QFE set an aircraft is 2000ft above an aerodrome. The altimeter indication would be

Answer 5

[1840ft]

Question 6

In a warm cloud, the water droplets will

a.join together if they have the same electrical charge

b.join to ice crystals after leaving the cloud

c.join together after leaving the cloud

d.join together by coalescence

Answer 6

d.join together by coalescence

Question 7

What type of surface inversion is most likely to form from a high pressure at altitude?

a.Subsidence inversion

b.Frontal inversion

c.Radiation inversion

d.Ground inversion

Answer 7

a.Subsidence inversion

Question 8

A Cb developing into a thunderstorm can reach a height of

Answer 8

[20km]

Question 9

What is the layer thickness between FL070 and FL190 if the ISA deviation below FL200 is +5? (Use 27ft/hpa)

Answer 9

[12240ft]

Solution:
TEC: 4 x 5 (Dev) x 12000/1000 = 240.
ISE Dev is +5 (warmer than ISA) so the true altitude will be higher than the indicated.
Indicated altitude is 12000ft. Add the TEC of 240ft

Question 10

On an upper wind and temperature chart for FL390, the temperature over London is -56C. The ISA deviation at this location is

Answer 10

[ISA +0.5]

Question 11

What are the main factors that determine the depth of the friction layer?

a.Terrain, wind speed and stability

b.Wind speed, time of day and terrain

c.Time of day, humidity and terrain

d.Temperature, stability, wind speed

Answer 11

a. Terrain, wind speed and stability

Question 12

In ISA, at what altitude is density half the surface value?

Answer 12

[22,000ft]

Question 13

What is the most likely temperature band in which super-cooled water droplets and ice crystals can be found?

a.Minus 15 to minus 40 degrees C

b.Minus 30 to minus 55 degrees C

c.Minus 5 to minus 15 degrees C

d.Zero to minus 10 degrees C

Answer 13

a. Minus 15 to minus 40 degrees C

Question 14

The size of a drizzle droplet is

Answer 14

[< 0.5mm]

Question 15

Flying in the Northern Hemisphere with a tailwind you

Answer 15

[have a low pressure on your left]

Question 16

Which statement about the ozone layer is correct?

a.It is in the lower stratosphere and higher troposphere

b.It is mainly in the troposphere and is harmful to humans

c.It is in the ionosphere

d.It is not harmful to humans

Answer 16

a.It is in the lower stratosphere and higher troposphere

Question 17

What type of lightning occurs inside a thunderstorm cloud?

a.Air to ground

b.Cloud to cloud

c.Cloud to air

d.Intra-cloud

Answer 17

d. Intra-cloud

Question 18

Which of the following is associated with strong surface convergence?

Answer 18

[low pressure] and [rising air]

Question 19

Select the correct answer with regard to ozone

a.Ozone is mainly in the troposphere and it is harmful to humans

b.Passengers and crew are exposed to ozone at jet cruise altitudes and it is hazardous to humans

c.Ozone is found in the ionosphere and is not hazardous to humans at jet cruise altitudes

d.Ozone levels increase at night so long haul flights are more likely to experience greater exposure

Answer 19

b. Passengers and crew are exposed to ozone at jet cruise altitudes and it is hazardous to humans

Question 20

How is energy transferred into the atmosphere?

a.By long wave to the surface and short wave to space

b.By short wave to the surface and long wave to space

c.By molecular transfer from the ionosphere

d.By short wave from space

Answer 20

b.By short wave to the surface and long wave to space

Question 21

With an area of convergence in the upper troposphere, what can be assumed at lower levels

Answer 21

[divergence in the lower troposphere]

Question 22

From the chart below, an aircraft maintaining FL170 flying from London to point C will experience

Answer 22

[a decrease in true altitude]