Ppl Meteorology chapters 1-6

What is the average height of the tropopause?

• 36090m

• 36090ft

• 60000ft

• 56000ft

If the ELR is 4°C/1000ft then:

• Saturated air is stable and dry air is unstable

• Both saturated and dry air is unstable

• Saturated air is unstable and dry air is stable

• Both saturated and dry air are stable

Unstable air is:

• Air that once disturbed will return to its original position

• Air that once disturbed will continue moving away form origin

• Air that once disturbed will stay in the disturbed position

What is the standard adiabatic lapse rate?

• 1.98°C/1000ft

• 2.98°C/1000ft

• 1.89°C/1000ft

• 3°C/1000ft

What is Vertical wind shear

• Two parcels of air moving side by side in different directions

• Two parcels of air moving on top of each other in different directions

• One parcel of air changing speed slightly

• One parcel of air changing direction

With regards to Buys Ballots Law: Standing with your back into the wind in the southern hemisphere, the low will be:

• In front of you

• Behind you

• On your left

• On your right

A high has:

• Upper level convergence, low level divergence

• Upper level divergence, lower level convergence

• Upper and lower level divergence

• Upper and lower level convergence

A good 25kt wind sock at 45° degrees deflection is indicating how many knots

• 8

• 19

• 23

• 15

After sunrise, the surface wind will:

• Back and increase

• Back and decrease

• Veer and increase

• Veer and decrease

After sunset, the winds will:

• Veer and increase

• Veer and decrease

• Back and increase

• Back and decrease