Environmental System & associated Malfunctions/EP

Question 1

What is the cockpit pressurization schedule limit?

Answer 1

3.6±0.2 psi

Question 2

When does the CKPT PX annunciator illuminate?

Answer 2

3.9 to 4.0 psi

Question 3

Cockpit ΔP display changes to red & over pressurization safety valve opens at ______psi.

Answer 3

4.0 psi

Question 4

Cockpit cooling is provided by a _________ with an engine driven compressor.

Answer 4

Vapor cycle system

Question 5

Engine bleed air is utilized for which items?

Answer 5

Canopy pressurization seal, anti-G system, cockpit heating/defogging, pressurization, & OBOGS

Question 6

The left side P3 port provides engine bleed air for which system?

Answer 6

OBOGS

Question 7

For ground ops, a _____ supplies the necessary cooling air flow.

Answer 7

Blower

Question 8

With weight off the landing gear, electrical power to the blower is terminated & _____ through the cooling air inlet is ducted to the heat exchanged

Answer 8

Ram air

Question 9

When the air conditioning compressor is operating and the aircraft is below ____’ft MSL, the inflow valve is automatically closed regardless of the BLEED AIR INFLOW switch.

Answer 9

7,500’ft MSL

Question 10

When the DEFOG is set to ON, the ______ valve is opened to maximize the volume of bleed air entering the cockpit

Answer 10

Inflow valve

Question 11

True/False: If the bleed air temp exceeds 200°F, an amber DUCT TEMP illuminates.

Answer 11

FALSE, exceeds 300°F

Question 12

The canopy seal/anti-G electrical shutoff valve is controlled by which switch?

Answer 12

BLEED AIR INFLOW switch

Question 13

A _______ is incorporated into the system to protect anti-G valves from contamination.

Answer 13

Water separator

Question 14

14. A safety valve in the anti-G system will automatically provide pressure relief if the pressure exceeds ____psi.

Answer 14

7 psi

Question 15

The temperature of air entering the cockpit is normally controlled automatically between ___°F & ____°F.

Answer 15

60°F & 90°F

Question 16

If the temp controller detects a temp in excess of ____°F, it directs the heat exchanger bypass valve to move to full closed, forcing max bleed air through the heat exchanger.

Answer 16

165°F

Question 17

What three things does placing the DEFOG switch ON do?

Answer 17

a. Defog valve opens, increasing bleed air supply
b. Inflow valve is automatically set to high, further increasing bleed air supply
c. Air conditioning compressor is automatically turned on to dry the air

Question 18

If the DEFOG is switched OFF, the electrically controlled defog valve may take up to ___ seconds to close.

Answer 18

40 seconds

Question 19

True/False: Operation of the canopy defog increases ITT for a given PCL setting.

Answer 19

True, adjust the PCL to maintain ITT within limits

Question 20

As the aircraft approaches ____’ft pressure altitude, the control valve regulator will open and close the control valve to maintain cockpit pressure.

Answer 20

8,000’ft pressure altitude

Question 21

An 8,000’ft ckpt altitude is maintained until a differential pressure of _____psi is reached at ______’ft.

Answer 21

3.6±0.2psi; 18,069’ft

Question 22

What is cockpit pressure altitude at 31,000’ft?

Answer 22

16,600’ft

Question 23

If cockpit pressure altitude rises above _____’ft, an amber ______ annunciator illuminates

Answer 23

19,000’ft; CKPT ALT

Question 24

What happens when selecting DUMP on the pressurization control switch?

Answer 24

Removes power from dump solenoid, which opens it electrically and opens the control valve. Bleed air inflow continues.

Question 25

What happens when selecting RAM/DUMP on the pressurization control switch?

Answer 25

Opens the control valve & fresh air valve, and closes the defog valve. Bleed air inflow continues.

Question 26

What is powered on when the DEFOG switch is ON?

Answer 26

The air conditioning compressor

Question 27

When is cockpit cooling air available?

Answer 27

a. engine running
b. generator is on line
c. generator bus is powered
d. AIR COND or DEFOG switch is ON

Question 28

The _________ will be on anytime the AVIONICS MASTER switch is ON.

Answer 28

Evaporator blowers

Question 29

The fresh air valve is automatically closed when approaching ____’ft pressure altitude.

Answer 29

8,000’ft pressure altitude