Ice

Question 1

Which conditions result in the formation of frost?

Answer 1

Temperature of the collecting surface is below the dewpoint of surrounding air and the dewpoint is colder than freezing.

Question 2

Why is frost considered hazardous to flight operation?

Answer 2

Frost causes early airflow separation resulting in a loss of lift.

Question 3

In which meteorological environment is aircraft structural icing most likely to have the highest rate of accumulation?

Answer 3

Freezing rain.

Question 4

Test data indicate that ice, snow, or frost having a thickness and roughness similar to medium or coarse sandpaper on the leading edge and upper surface of an airfoil.

Answer 4

reduce lift by as much as 30 percent and increase drag by 40 percent.

Question 5

Where outside the aircraft does ice generally form first?

Answer 5

Small and/or narrow objects.

Question 6

Frost adhering to the wing will

Answer 6

decrease the margin of airspeed above stall.

Question 7

What aircraft performance can be expected with structural icing?

Answer 7

Unpredictable flight characteristics.

Question 8

Even a small amount of accumulated ice is hazardous because it

Answer 8

increases weight and adversely impacts lift.

Question 9

One visual indication of conditions favorable to supercooled large droplet icing is

Answer 9

droplets that splash or splatter on impact at temperatures below +5*C.

Question 10

While en route on an IFR flight, you receive a report of moderate icing along your route. This indicates

Answer 10

the rate of accumulation is potentially hazardous and activation of deicing equipment or diversion is necessary.

Question 11

Ice contamination on the wing surface

Answer 11

must be completely removed before flight.

Question 12

Which is an effect of ice, snow, or frost formation on an airplane wing?

Answer 12

Decreased angle of attack for stalls.

Question 13

Structural icing will most likely form on the

Answer 13

tail.

Question 14

You encounter freezing drizzle at your flight altitude. This is an indication that

Answer 14

warmer air is above you.

Question 15

While enroute to destination, you receive approach clearance and descend to final approach altitude. After configuring the airplane for landing by extending landing gear and flaps, the nose pitches down. Suspecting ice-contaminated tailplane stall (ICTS) you should

Answer 15

partially or completely retract the flaps and prepare for a no-flap approach and landing

Question 16

If you encounter icing with the autopilot engaged, you should be aware that

Answer 16

it may be best to periodically disengage the autopilot and hand-fly the aircraft

Question 17

Which is true regarding recovery procedures from aerodynamic stalls due to structural icing?

Answer 17

Some measures for recovery from ICTS are opposite of those for recovery from wing stall.

Question 18

Wing stall and roll upset can occur in all phases of flight, however, the approach and landing phase is particularly susceptible to ice contaminated tailplane stall (ICTS). To minimize this risk you should

Answer 18

know the published limitations in the AFM on the maximum flap setting approved in icing conditions due to ICTS susceptibility.

Question 19

While flying with the autopilot engaged, you encounter structural icing. You should be aware that

Answer 19

you may want to consider disengaging the autopilot and hand-flying.