Questions on "Aircraft System"

[truefaith]

Questions on "Airframe Systems"

I have some questions pertaining to aircraft system. Can somebody help?

Q1. Within the cold air unit of the ACM (Air Cycle Machine), the turbine causes
(a) the air tempertaure to rise
(b) the air temperature to drop
(c) the air to further compress
(d) the air pressure to be the same

Q2. In a vapour cycle cooling system, the lowest temperature of the refrigerant is at the _____?
(a) expansion valve
(b) compressor
(c) condenser
(d) evaporator

Q3. The refrigerant of a vapour cycle cooling system on entering the compressor is
(a) a high pressure vapour
(b) a high pressure liquid
(c) a low pressure vapour
(d) a low pressure liquid

Q4. Main and nose wheel bays are:
(a) pressurised
(b) unpressurised
(c) conditioned
(d) different, with the mains being unpressurised and the nose pressurised.

Q5. When would the negative differential limit be reached/exceeded?
(a) rapid descent when aircraft descends below cabin altitude
(b) during ground pressure testing
(c) rapid ascent when aircraft climbs
(d) when changing to manual operation

Q6. The term pressure cabin is used to describe
(a) pressurisation of the flight deck only
(b) the ability to pressurise the aircraft at a higher ambient pressure
(c) the cabin pressure on an airliner
(d) the ability to maintain a constant pressure differential at all altitudes