SIFT SIFT Aviation Weather and Navigation Questions and Answers 2

Question 1

What type of fog forms when warm, moist air flows over a cooler surface, such as a cold ocean current or cold land?

Accepted Answer

Advection fog

Answer

Radiation fog

Answer

Upslope fog

Answer

Steam fog

Question 2

Which cloud layer is most associated with stable air, smooth flying conditions, and widespread low visibility?

Accepted Answer

Stratus

Answer

Cumulus

Answer

Cumulonimbus

Answer

Cirrocumulus

Question 3

What is the primary hazard of structural icing on a helicopter's main rotor blades?

Accepted Answer

Disruption of the rotor's airfoil shape, reducing lift and increasing drag

Answer

Increased rotor RPM beyond limits

Answer

Magnetic interference with navigation instruments

Answer

Vibration that locks the anti-torque pedals

Question 4

In aviation, IMC stands for:

Accepted Answer

Instrument Meteorological Conditions

Answer

Integrated Mission Control

Answer

In-flight Mechanical Checklist

Answer

Indicated Magnetic Course

Question 5

High density altitude — such as that experienced on a hot, humid day at a high-elevation airfield — affects helicopter performance by:

Accepted Answer

Reducing air density, which decreases both engine power output and rotor lift

Answer

Increasing available engine power and rotor efficiency

Answer

Increasing rotor lift while reducing engine torque

Answer

Having no measurable effect if the pilot adjusts collective properly

Question 6

What does a METAR provide to pilots?

Accepted Answer

A routine, standardized report of current surface weather conditions at an airport

Answer

A 48-hour forecast for a specific airport terminal area

Answer

A graphical depiction of frontal systems across a region

Answer

Pilot reports (PIREPs) of turbulence along airways