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Worksheets737 - Air Systems
Total questions: 86
Worksheet time: 20hrs 39mins
Name
Class
Date
1.
What are the possible sources of air for the bleed air system on the Boeing 737-800?
a)
Engines, APU, external air cart/source
b)
Engines, batteries, external air cart/source
c)
APU, batteries, external air cart/source
d)
Engines, APU, batteries
2.
Which systems rely on the bleed air system for operation on the Boeing 737-800?
a)
Air conditioning, pressurization, wing and engine thermal anti-icing
b)
Engine starting, hydraulic reservoirs pressurization, water tank pressurization
c)
Nitrogen Generation System, water tank pressurization, engine starting
d)
All of the above
3.
From which stages of the compressor section is engine bleed air obtained on the Boeing 737-800?
a)
3rd and 7th stages
b)
4th and 8th stages
c)
5th and 9th stages
d)
6th and 10th stages
4.
What is the function of the engine bleed air valve on the Boeing 737-800?
a)
To act as a shutoff valve only
b)
To act as a pressure regulator only
c)
To act as both a pressure regulator and shutoff valve
d)
To act as a temperature regulator
5.
What do bleed trip sensors do on the Boeing 737-800?
a)
Illuminate the BLEED TRIP OFF light and close the respective engine bleed air valve automatically
b)
Illuminate the DUAL BLEED light and close the respective engine bleed air valve automatically
c)
Illuminate the BLEED TRIP OFF light and open the respective engine bleed air valve automatically
d)
Illuminate the WING BODY OVERHEAT light and close the respective engine bleed air valve automatically
6.
What do duct pressure transmitters provide on the Boeing 737-800?
a)
Bleed air temperature indications
b)
Bleed air pressure indications
c)
Cabin pressurization status
d)
Engine performance data
7.
What is the function of the isolation valve on the Boeing 737-800?
a)
To isolate the bleed air system from the hydraulic system
b)
To isolate the left and right sides of the bleed air duct
c)
To isolate the engine bleed air from the APU bleed air
d)
To isolate the bleed air system from the water system
8.
What is the purpose of the external air connection on the Boeing 737-800?
a)
To provide an alternate air source for engine start or air conditioning
b)
To provide an alternate air source for pressurizing the hydraulic system
c)
To provide an alternate air source for cooling the avionics
d)
To provide an alternate air source for cabin pressurization
9.
What happens to the APU bleed air valve when the APU is shut down on the Boeing 737-800?
a)
It remains open
b)
It closes automatically
c)
It remains partially open
d)
It operates manually
10.
When does the DUAL BLEED light illuminate on the Boeing 737-800?
a)
Whenever the APU bleed air valve is open
b)
Whenever the engine bleed air valves are open
c)
Whenever the isolation valve is closed
d)
Whenever the APU bleed air valve is open and the engine bleed air switches and isolation valve are positioned to permit backpressure of the APU
11.
What is a wing-body overheat condition on the Boeing 737-800 caused by?
a)
High engine temperatures
b)
A bleed air duct leak
c)
High ambient temperatures
d)
Electrical system failure
12.
What provides temperature controlled air in the Boeing 737-800?
a)
Bleed air from the engines, APU, or ground air source
b)
Only bleed air from the engines
c)
Only the APU
d)
Only a ground air source
13.
Where does conditioned air from the left pack flow directly on the Boeing 737-800?
a)
To the passenger cabin
b)
To the mix manifold
c)
To the flight deck
d)
To the cargo hold
14.
What controls the flow of bleed air through each air conditioning pack on the Boeing 737-800?
a)
The bleed air valves
b)
The pack valves
c)
The isolation valve
d)
The ram air inlet doors
15.
How many packs can the APU supply with bleed air on the ground on the Boeing 737-800?
a)
One
b)
Two
c)
Three
d)
Four
16.
What happens to the remaining pack if one pack fails in flight with both air conditioning pack switches set to AUTO?
a)
It continues to operate normally
b)
It automatically switches to high air flow
c)
It shuts down automatically
d)
It reduces airflow
17.
What is the function of the ram air system on the Boeing 737-800?
a)
To provide conditioned air
b)
To provide cooling air for the heat exchangers
c)
To provide pressurization
d)
To provide cabin ventilation
18.
When does the RAM DOOR FULL OPEN light illuminate on the Boeing 737-800?
a)
When a ram door is fully open
b)
When a ram door is fully closed
c)
When the ram air system fails
d)
When the pack valve is closed
19.
What causes the pack valve to close and the PACK light to illuminate on the Boeing 737-800?
a)
A low pressure condition
b)
A high pressure condition
c)
An overheat condition
d)
A low temperature condition
20.
How is zone temperature controlled on the Boeing 737-800?
a)
By adjusting the pack valves
b)
By adjusting the trim air modulating valves
c)
By adjusting the ram air inlet doors
d)
By adjusting the isolation valve
21.
What happens if both the primary and standby pack controls fail for the same pack on the Boeing 737-800?
a)
The pack shuts down automatically
b)
The pack continues to operate without control
c)
The pack switches to standby mode
d)
The pack operates at reduced capacity
22.
What are the three temperature control zones on the Boeing 737-800?
a)
Flight deck, forward passenger cabin, aft passenger cabin
b)
Flight deck, mid passenger cabin, aft passenger cabin
c)
Forward passenger cabin, mid passenger cabin, aft passenger cabin
d)
Flight deck, cargo hold, aft passenger cabin
23.
What happens if air in a zone supply duct overheats on the Boeing 737-800?
a)
The pack valve closes
b)
The trim air modulating valve closes
c)
The ram air inlet door opens
d)
The isolation valve closes
24.
What is the function of the left electronic controller in the zone temperature control system on the Boeing 737-800?
a)
To control the forward cabin zone
b)
To control the aft cabin zone and provide backup control for the flight deck
c)
To control the flight deck zone
d)
To control the aft cabin zone and provide backup control for the forward cabin
25.
What does a failure of the forward or aft cabin temperature control cause on the Boeing 737-800?
a)
The associated pack valve closes
b)
The associated ram air inlet door closes
c)
The associated trim air modulating valve closes
d)
The associated isolation valve closes
26.
What happens if all Temperature Selectors are positioned OFF on the Boeing 737-800?
a)
The pack controls maintain a fixed temperature of 65°F
b)
The pack controls maintain a fixed temperature of 75°F
c)
The pack controls maintain a fixed temperature of 70°F
d)
The pack controls maintain a fixed temperature of 60°F and 80°F
27.
What collects conditioned air in the Boeing 737-800 air conditioning distribution system?
a)
The mix manifold
b)
The bleed air duct
c)
The recirculation fan
d)
The exhaust duct
28.
What causes the appropriate trim air modulating valve to close and the ZONE TEMP light to illuminate in the Boeing 737-800?
a)
Low temperature condition
b)
Overheat condition
c)
High pressure condition
d)
Low pressure condition
29.
How is conditioned air for the flight deck distributed in the Boeing 737-800?
a)
Through the overhead distribution duct
b)
Through sidewall risers
c)
Through floor, ceiling, and foot level outlets
d)
Through the E & E bay exhaust ducts
30.
What is the purpose of the dual purpose valve behind the rudder pedal of each pilot on the Boeing 737-800?
a)
To provide air for warming the pilots' feet and defogging the No. 1 windshields
b)
To provide emergency oxygen supply
c)
To provide cooling air
d)
To provide backup air conditioning
31.
Where is the overhead distribution duct located in the Boeing 737-800 passenger cabin?
a)
Along the floor
b)
Along the sidewalls
c)
Along the airplane centerline
d)
Above the lavatories
32.
What is the function of the recirculation fan system on the Boeing 737-800?
a)
To increase engine bleed air demand
b)
To reduce the air conditioning system pack load and engine bleed air demand
c)
To increase cabin pressurization
d)
To reduce cabin temperature
33.
What happens if an equipment cooling fan fails on the Boeing 737-800?
a)
The affected system shuts down
b)
The related equipment cooling OFF light illuminates
c)
The MASTER CAUTION light illuminates
d)
The associated pack valve closes
34.
How is airflow restored if an equipment cooling fan fails on the Boeing 737-800?
a)
By selecting the alternate fan
b)
By resetting the circuit breaker
c)
By switching to manual mode
d)
By turning off the affected system
35.
How is the forward cargo compartment heated during flight on the Boeing 737-800?
a)
By the engine bleed air
b)
By the recirculation fan system
c)
By the exhaust air from the equipment cooling system
d)
By the air conditioning packs
36.
Where can a ground air conditioning source be connected to distribute preconditioned air throughout the Boeing 737-800?
a)
The bleed air duct
b)
The recirculation fan system
c)
The mix manifold
d)
The exhaust duct
37.
How is cabin pressurization controlled during all phases of airplane operation on the Boeing 737-800?
a)
By the cabin pressure control system
b)
By the engine bleed air system
c)
By the APU system
d)
By the hydraulic system
38.
What do the two pressure relief valves on the Boeing 737-800 provide?
a)
Normal pressurization control
b)
Safety pressure relief
c)
Cabin temperature control
d)
Cabin air circulation
39.
What are the three modes of operation for the cabin pressure controller on the Boeing 737-800?
a)
AUTO, MAN, EMER
b)
AUTO, ALTN, EMER
c)
AUTO, ALTN, MAN
d)
AUTO, MAN, ALT
40.
What is the function of the outflow valve on the Boeing 737-800?
a)
To control cabin air inflow
b)
To control cabin air outflow
c)
To control cabin temperature
d)
To control cabin humidity
41.
When is the overboard exhaust valve on the Boeing 737-800 driven open?
a)
When both pack switches are in HIGH and the right recirculation fan is off
b)
When both pack switches are in AUTO and the left recirculation fan is off
c)
When the outflow valve is closed
d)
When the airplane is on the ground
42.
What altitudes does the cabin pressure controller preset in AUTO or ALTN mode on the Boeing 737-800?
a)
Takeoff and cruise altitude
b)
Cruise and landing altitude
c)
Takeoff and landing altitude
d)
Cruise and descent altitude
43.
What activates the cruise mode on the cabin pressure controller of the Boeing 737-800?
a)
Reaching a climb rate of 0.25 psi
b)
Reaching a descent rate of 0.25 psi
c)
Reaching within 0.25 psi of the selected FLT ALT
d)
Reaching within 0.25 psi of the selected LAND ALT
44.
When does the descent mode activate on the cabin pressure controller of the Boeing 737-800?
a)
When the airplane descends 0.25 psi below the selected FLT ALT
b)
When the airplane descends 0.25 psi below the selected LAND ALT
c)
When the airplane descends 0.25 psi below the takeoff altitude
d)
When the airplane reaches the ground
45.
What is the maximum differential pressure the two pressure relief valves can limit on the Boeing 737-800?
a)
7.45 psi
b)
8.35 psi
c)
9.1 psi
d)
10.1 psi
46.
When does the amber OFF SCHED DESCENT light illuminate on the Boeing 737-800?
a)
The airplane has started to descend without reaching the preset cruise altitude
b)
The airplane has started to ascend without reaching the preset cruise altitude
c)
The airplane has reached the preset cruise altitude
d)
The airplane has reached the preset landing altitude
47.
What does the AUTO FAIL light indicate when illuminated on the Boeing 737-800?
a)
Loss of DC power, controller fault, or outflow valve control fault
b)
Excessive rate of cabin pressure change
c)
High cabin altitude
d)
All of the above
48.
How is cabin altitude manually controlled in the MAN mode on the Boeing 737-800?
a)
By adjusting the trim air modulating valve
b)
By adjusting the outflow valve
c)
By adjusting the recirculation fan
d)
By adjusting the isolation valve
49.
What systems rely on the bleed air system for operation on the Boeing 737-800?
a)
Air conditioning/pressurization, wing and engine thermal anti-icing, engine starting
b)
Hydraulic reservoirs pressurization, water tank pressurization
c)
Nitrogen Generation System
d)
All of the above
50.
From which stages of the compressor section is engine bleed air obtained on the Boeing 737-800?
a)
3rd and 7th stages
b)
4th and 8th stages
c)
5th and 9th stages
d)
6th and 10th stages
51.
What is the function of the engine bleed air valve on the Boeing 737-800?
a)
To act as a shutoff valve only
b)
To act as a pressure regulator only
c)
To act as both a pressure regulator and shutoff valve
d)
To act as a temperature regulator
52.
What do bleed trip sensors do on the Boeing 737-800?
a)
Illuminate the BLEED TRIP OFF light and close the respective engine bleed air valve automatically
b)
Illuminate the DUAL BLEED light and close the respective engine bleed air valve automatically
c)
Illuminate the BLEED TRIP OFF light and open the respective engine bleed air valve automatically
d)
Illuminate the WING BODY OVERHEAT light and close the respective engine bleed air valve automatically
53.
What do duct pressure transmitters provide on the Boeing 737-800?
a)
Bleed air temperature indications
b)
Bleed air pressure indications
c)
Cabin pressurization status
d)
Engine performance data
54.
What is the function of the isolation valve on the Boeing 737-800?
a)
To isolate the bleed air system from the hydraulic system
b)
To isolate the left and right sides of the bleed air duct
c)
To isolate the engine bleed air from the APU bleed air
d)
To isolate the bleed air system from the water system
55.
What is the purpose of the external air connection on the Boeing 737-800?
a)
To provide an alternate air source for engine start or air conditioning
b)
To provide an alternate air source for pressurizing the hydraulic system
c)
To provide an alternate air source for cooling the avionics
d)
To provide an alternate air source for cabin pressurization
56.
What happens to the APU bleed air valve when the APU is shut down on the Boeing 737-800?
a)
It remains open
b)
It closes automatically
c)
It remains partially open
d)
It operates manually
57.
When does the DUAL BLEED light illuminate on the Boeing 737-800?
a)
Whenever the APU bleed air valve is open
b)
Whenever the engine bleed air valves are open
c)
Whenever the isolation valve is closed
d)
Whenever the APU bleed air valve is open and the engine bleed air switches and isolation valve are positioned to permit backpressure of the APU
58.
What is a wing-body overheat condition on the Boeing 737-800 caused by?
a)
High engine temperatures
b)
A bleed air duct leak
c)
High ambient temperatures
d)
Electrical system failure
59.
What is the function of the air conditioning packs on the Boeing 737-800?
a)
To supply conditioned air to the flight deck and passenger cabin
b)
To supply bleed air to the engines
c)
To supply fuel to the engines
d)
To supply hydraulic pressure
60.
How is conditioned air distributed to the flight deck on the Boeing 737-800?
a)
Directly from the mix manifold
b)
Directly from the left pack
c)
Directly from the right pack
d)
Directly from the recirculation system
61.
What is the purpose of the ram air system on the Boeing 737-800?
a)
To provide ventilation for the passenger cabin
b)
To provide cooling air for the heat exchangers
c)
To provide pressurization
d)
To provide cooling air for the engines
62.
When does the RAM DOOR FULL OPEN light illuminate on the Boeing 737-800?
a)
When a ram door is fully open
b)
When a ram door is fully closed
c)
When the ram air system fails
d)
When the pack valve is closed
63.
What causes the pack valve to close and the PACK light to illuminate on the Boeing 737-800?
a)
A low pressure condition
b)
A high pressure condition
c)
An overheat condition
d)
A low temperature condition
64.
How is zone temperature controlled on the Boeing 737-800?
a)
By adjusting the pack valves
b)
By adjusting the trim air modulating valves
c)
By adjusting the ram air inlet doors
d)
By adjusting the isolation valve
65.
What happens if both the primary and standby pack controls fail for the same pack on the Boeing 737-800?
a)
The pack shuts down automatically
b)
The pack continues to operate without control
c)
The pack switches to standby mode
d)
The pack operates at reduced capacity
66.
What are the three temperature control zones on the Boeing 737-800?
a)
Flight deck, forward passenger cabin, aft passenger cabin
b)
Flight deck, mid passenger cabin, aft passenger cabin
c)
Forward passenger cabin, mid passenger cabin, aft passenger cabin
d)
Flight deck, cargo hold, aft passenger cabin
67.
What happens if air in a zone supply duct overheats on the Boeing 737-800?
a)
The pack valve closes
b)
The trim air modulating valve closes
c)
The ram air inlet door opens
d)
The isolation valve closes
68.
What is the function of the left electronic controller in the zone temperature control system on the Boeing 737-800?
a)
To control the forward cabin zone
b)
To control the aft cabin zone and provide backup control for the flight deck
c)
To control the flight deck zone
d)
To control the aft cabin zone and provide backup control for the forward cabin
69.
What does a failure of the forward or aft cabin temperature control cause on the Boeing 737-800?
a)
The associated pack valve closes
b)
The associated ram air inlet door closes
c)
The associated trim air modulating valve closes
d)
The associated isolation valve closes
70.
What happens if all Temperature Selectors are positioned OFF on the Boeing 737-800?
a)
The pack controls maintain a fixed temperature of 65°F
b)
The pack controls maintain a fixed temperature of 75°F
c)
The pack controls maintain a fixed temperature of 70°F
d)
The pack controls maintain a fixed temperature of 60°F and 80°F
71.
What does the cabin pressure control system use to control pressurization and ventilation on the Boeing 737-800?
a)
Modulating the outflow valve and the overboard exhaust valve
b)
Modulating the bleed air valves
c)
Modulating the pack valves
d)
Modulating the ram air inlet doors
72.
How many automatic controllers are there in the cabin pressure control system of the Boeing 737-800?
a)
One
b)
Two
c)
Three
d)
Four
73.
What prevents external atmospheric pressure from exceeding internal cabin pressure on the Boeing 737-800?
a)
Pressure relief valve
b)
Negative relief valve
c)
Outflow valve
d)
Overboard exhaust valve
74.
What is the maximum cabin altitude normally controlled by the cabin pressure controller on the Boeing 737-800?
a)
6,000 feet
b)
7,000 feet
c)
8,000 feet
d)
9,000 feet
75.
How is cabin air outflow controlled on the Boeing 737-800?
a)
By the bleed air valves
b)
By the ram air inlet doors
c)
By the outflow valve and the overboard exhaust valve
d)
By the isolation valve
76.
Where is passenger cabin air drawn from and discharged overboard through the outflow valve on the Boeing 737-800?
a)
Ceiling vents
b)
Sidewall vents
c)
Foot level grills
d)
Overhead diffusers
77.
When is the overboard exhaust valve on the Boeing 737-800 normally closed?
a)
On the ground
b)
In flight at higher cabin differential pressures
c)
In flight at lower cabin differential pressures
d)
During takeoff
78.
What altitudes does the cabin pressure controller preset in AUTO or ALTN mode on the Boeing 737-800?
a)
Takeoff and cruise altitude
b)
Cruise and landing altitude
c)
Takeoff and landing altitude
d)
Cruise and descent altitude
79.
What activates the cruise mode on the cabin pressure controller of the Boeing 737-800?
a)
Reaching a climb rate of 0.25 psi
b)
Reaching a descent rate of 0.25 psi
c)
Reaching within 0.25 psi of the selected FLT ALT
d)
Reaching within 0.25 psi of the selected LAND ALT
80.
When does the descent mode activate on the cabin pressure controller of the Boeing 737-800?
a)
When the airplane descends 0.25 psi below the selected FLT ALT
b)
When the airplane descends 0.25 psi below the selected LAND ALT
c)
When the airplane descends 0.25 psi below the takeoff altitude
d)
When the airplane reaches the ground
81.
What is the maximum differential pressure the two pressure relief valves can limit on the Boeing 737-800?
a)
7.45 psi
b)
8.35 psi
c)
9.1 psi
d)
10.1 psi
82.
What is the consequence of an amber OFF SCHED DESCENT light illumination on the Boeing 737-800?
a)
The airplane has started to descend without reaching the preset cruise altitude
b)
The airplane has started to ascend without reaching the preset cruise altitude
c)
The airplane has reached the preset cruise altitude
d)
The airplane has reached the preset landing altitude
83.
What does the AUTO FAIL light indicate when illuminated on the Boeing 737-800?
a)
Loss of DC power, controller fault, or outflow valve control fault
b)
Excessive rate of cabin pressure change
c)
High cabin altitude
d)
All of the above
84.
How is cabin altitude manually controlled in the MAN mode on the Boeing 737-800?
a)
By adjusting the trim air modulating valve
b)
By adjusting the outflow valve
c)
By adjusting the recirculation fan
d)
By adjusting the isolation valve
85.
Which engine stage provides low pressure bleed air for the bleed air system on the Boeing 737-800?
a)
3rd stage
b)
5th stage
c)
7th stage
d)
9th stage
86.
Which engine stage provides high pressure bleed air for the bleed air system on the Boeing 737-800?
a)
3rd stage
b)
5th stage
c)
7th stage
d)
9th stage
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