Heating and Cooling

Question 1

Temperature varies inversely with altitude, meaning:

Answer 1

As altitude increases temperature decreases

Question 2

What are the two types of air conditioning systems and what type of aircraft are they commonly used on?

Answer 2

Air cycle: most commonly used on turbine-powered aircraft, making use of bleed air or APU pneumatic air. Vapor Cycle: often used on reciprocating aircraft (similar to houses and cars.)

Question 3

In air cycle systems, bleed air temperatures may reach as high as ____ and pressure of up to ____.

Answer 3

600*F and 220 PSI

Question 4

In aircraft with air cycle systems, if the normal system becomes inoperative, what is capable of providing cold outside air?

Answer 4

Emergency Ram Air System

Question 5

Vapor cycle systems use refrigerant (sometimes called Freon) to cool air, what refrigerant is used in CG aviation?

Answer 5

Tetraflouroethane-R134a