AVIT 428 EXAM 3 B737 QUESTIONS ANSWERED CORRECTLY GRADED A+
True or False: The three hydraulic pumps do not share pumps or reservoirs? - Answers True
The landing gear is powered by Hydraulic System___? - Answers A
The trailing edge flaps are powered by Hydraulic System___? - Answers B
What happens if a leak develops in the System A engine driven pump and what happens if a leak
develops in the System B electric motor driven pump? - Answers If a leak develops in the A
system engine driven pump lines the fluid level will drop down to approximately 20% and
hydraulic system pressure will not be lost. If a leak develops in the B system electric motor
driven pump lines the fluid level will drop down to the standpipe. All pressure will be lost,
however sufficient fluid remains for PTU operation.
The engine driven pump provides approximately ___x the amount of fluid volume as the
respective electric motor driven pump? - Answers 4
On the ground, the minimum amount of fuel required in each main fuel tank to operate an
electric hydraulic pump is? - Answers 1,675 lbs
The landing gear transfer unit operates under which of the following conditions? (LIEW) -
Answers Landing Gear Handle Up
In flight
Either main gear not up and locked
Whenever System A does not have enough hydraulic fluid to raise the gear
What does the Power Transfer Unit (PTU) operate? (ALS) - Answers Autoslats
Leading edge flaps
Slats
True or False: When the Power Transfer Unit operates, hydraulic fluid is transferred from
System A hydraulic fluid reservoir to System B hydraulic fluid reservoir - Answers False cannot
be transferred between reservoirs. PTU does transfer fluid from A to B
True or False: If a hydraulic leak occurs in the standby hydraulic system, the standby reservoir
quantity decreases to zero and System B fluid quantity decreases to 50% - Answers False
Under which circumstances will the PTU operate automatically? (3) - Answers When the aircraft
is in flight, it will operate if system B engine-driven pump pressure drops below a limit and flaps
are less than 15 but not up.
If the fluid level in hydraulic system B drops to the top of standpipe, the reservoir quantity______
,for PTU operation? - Answers Is sufficient for power transfer unit operation
The heat exchanger for hydraulic system A is located? - Answers In main fuel tank 1
What is the purpose of the landing gear transfer unit? What hydraulic system fluid does the
landing gear transfer unit use? - Answers The purpose is to help raise the landing gear at a
normal rate in the event of a number 1 engine failure. It uses system B hydraulic fluid
What is indicated by the hydraulic pump OVERHEAT lights? - Answers Hydraulic fluid used to
cool and lubricate the corresponding electric motor driven pump has overheated or the pump
itself has overheated
If the Eng 1 hydraulic pump switch is selected to___, the pump___ to operate and the fluid is
blocked? - Answers Off, Continues
The STBY HYD LOW QUANTITY light illuminates when? - Answers Hydraulic fluid level in the
Standby Tank drops below 50%
The RF (refill) indication illuminates if the hydraulic quantity drops below____%? - Answers 76%
How can the standby hydraulic pump be activated manually? - Answers By selecting either FLT
CONTROL switch to STBY RUD
True or False: When an engine fire switch is pulled, the associated hydraulic pump LOW
PRESSURE light illuminates? - Answers False
With the hydraulic system operating normally, the system pressure is approximately how many
psi? - Answers 3,000 psi
How can a pilot check the quantity in System A & B hydraulic reservoirs. - Answers By pushing
the MFD SYS switch on the center forward panel to display the quantity as a percentage on the
lower display unit
The power source for ____ electric hydraulic pump is AC transfer bus 2 - Answers System A
electric hydraulic pump
Which conditions must be met for the landing gear transfer unit to activate? (3) - Answers It will
activate if the No. 1 engine RPM drops below a limit value, the landing gear lever is up, and
either main landing gear is not up and locked
What is the purpose of the PTU? - Answers The PTU supplies system A fluid pressure needed to
operate the auto slats and leading edge flaps and slats at the normal rate when system B
engine driven hydraulic pump is lost.
The No. 2 engine-driven hydrualic pump pressurizes fluid for? - Answers Hydraulic system B
On the ground the APU is capable of supplying conditioned air to the ___pack(s)? - Answers
, Both left and right packs
How many hydraulic reservoirs does the B737NG have? - Answers 3
What does an amber hydrualic pump LOW PRESSURE light indicate? - Answers Output pressure
of the associated pump is low
Which systems can be controlled by the standby hydraulic system? (4) - Answers The rudder,
leading edge flaps and slats, thrust reversers and the standby yaw damper
What is the maximum hydraulic system pressure? - Answers 3500 psi
True or False, If a leak develops in the system A electric-driven hydraulic pump or its related
lines, the standpipe prevents a total system fluid loss? - Answers False! If a leak developed in
the system A engine-driven hydraulic pump, the standpipe would prevent total fluid loss
If the fluid level in hydraulic system A drops to the top of standpipe, the reservoir quantity
indicates approximately _____% full? - Answers 20%
True or False: Hydraulic system A operates the Alternate nose wheel steering? - Answers False
When is the white RF (refill) indication valid? - Answers It is only valid on the ground with both
engines shutdown or after landing with flaps up
How many hydraulic systems in the B737NG are controlled from the FO's side of the forward
overhead panel? - Answers 2
The minimum amount of fuel required for ground operation of an electric hydraulic pump is ____
pounds of fuel in the related main tank - Answers 1,675
What does moving the FLT CONTROL switch to STBY RUD activate? - Answers Activates the
standby hydraulic system pump
True or False: Grasping the Stabilizer Trim Wheel stops the electric trim from moving the
horizontal stabilizer? - Answers True
Which of the following leading edge devices are Not monitored for skew conditions? - Answers
Slats 1 and 8
Which of the following are mechanically controlled during manual reversion? (2) - Answers
Ailerons and Elevator
Hydraulic system ____ controls the normal operation of TE flaps? - Answers B
The mach trim system automatically functions above Mach___? - Answers .615
The Yaw Damper system is capable of providing which of the following?(3) - Answers Dutch roll
protection, Turn coordination and Gust Damping
True or False: The three hydraulic pumps do not share pumps or reservoirs? - Answers True
The landing gear is powered by Hydraulic System___? - Answers A
The trailing edge flaps are powered by Hydraulic System___? - Answers B
What happens if a leak develops in the System A engine driven pump and what happens if a leak
develops in the System B electric motor driven pump? - Answers If a leak develops in the A
system engine driven pump lines the fluid level will drop down to approximately 20% and
hydraulic system pressure will not be lost. If a leak develops in the B system electric motor
driven pump lines the fluid level will drop down to the standpipe. All pressure will be lost,
however sufficient fluid remains for PTU operation.
The engine driven pump provides approximately ___x the amount of fluid volume as the
respective electric motor driven pump? - Answers 4
On the ground, the minimum amount of fuel required in each main fuel tank to operate an
electric hydraulic pump is? - Answers 1,675 lbs
The landing gear transfer unit operates under which of the following conditions? (LIEW) -
Answers Landing Gear Handle Up
In flight
Either main gear not up and locked
Whenever System A does not have enough hydraulic fluid to raise the gear
What does the Power Transfer Unit (PTU) operate? (ALS) - Answers Autoslats
Leading edge flaps
Slats
True or False: When the Power Transfer Unit operates, hydraulic fluid is transferred from
System A hydraulic fluid reservoir to System B hydraulic fluid reservoir - Answers False cannot
be transferred between reservoirs. PTU does transfer fluid from A to B
True or False: If a hydraulic leak occurs in the standby hydraulic system, the standby reservoir
quantity decreases to zero and System B fluid quantity decreases to 50% - Answers False
Under which circumstances will the PTU operate automatically? (3) - Answers When the aircraft
is in flight, it will operate if system B engine-driven pump pressure drops below a limit and flaps
are less than 15 but not up.
If the fluid level in hydraulic system B drops to the top of standpipe, the reservoir quantity______
,for PTU operation? - Answers Is sufficient for power transfer unit operation
The heat exchanger for hydraulic system A is located? - Answers In main fuel tank 1
What is the purpose of the landing gear transfer unit? What hydraulic system fluid does the
landing gear transfer unit use? - Answers The purpose is to help raise the landing gear at a
normal rate in the event of a number 1 engine failure. It uses system B hydraulic fluid
What is indicated by the hydraulic pump OVERHEAT lights? - Answers Hydraulic fluid used to
cool and lubricate the corresponding electric motor driven pump has overheated or the pump
itself has overheated
If the Eng 1 hydraulic pump switch is selected to___, the pump___ to operate and the fluid is
blocked? - Answers Off, Continues
The STBY HYD LOW QUANTITY light illuminates when? - Answers Hydraulic fluid level in the
Standby Tank drops below 50%
The RF (refill) indication illuminates if the hydraulic quantity drops below____%? - Answers 76%
How can the standby hydraulic pump be activated manually? - Answers By selecting either FLT
CONTROL switch to STBY RUD
True or False: When an engine fire switch is pulled, the associated hydraulic pump LOW
PRESSURE light illuminates? - Answers False
With the hydraulic system operating normally, the system pressure is approximately how many
psi? - Answers 3,000 psi
How can a pilot check the quantity in System A & B hydraulic reservoirs. - Answers By pushing
the MFD SYS switch on the center forward panel to display the quantity as a percentage on the
lower display unit
The power source for ____ electric hydraulic pump is AC transfer bus 2 - Answers System A
electric hydraulic pump
Which conditions must be met for the landing gear transfer unit to activate? (3) - Answers It will
activate if the No. 1 engine RPM drops below a limit value, the landing gear lever is up, and
either main landing gear is not up and locked
What is the purpose of the PTU? - Answers The PTU supplies system A fluid pressure needed to
operate the auto slats and leading edge flaps and slats at the normal rate when system B
engine driven hydraulic pump is lost.
The No. 2 engine-driven hydrualic pump pressurizes fluid for? - Answers Hydraulic system B
On the ground the APU is capable of supplying conditioned air to the ___pack(s)? - Answers
, Both left and right packs
How many hydraulic reservoirs does the B737NG have? - Answers 3
What does an amber hydrualic pump LOW PRESSURE light indicate? - Answers Output pressure
of the associated pump is low
Which systems can be controlled by the standby hydraulic system? (4) - Answers The rudder,
leading edge flaps and slats, thrust reversers and the standby yaw damper
What is the maximum hydraulic system pressure? - Answers 3500 psi
True or False, If a leak develops in the system A electric-driven hydraulic pump or its related
lines, the standpipe prevents a total system fluid loss? - Answers False! If a leak developed in
the system A engine-driven hydraulic pump, the standpipe would prevent total fluid loss
If the fluid level in hydraulic system A drops to the top of standpipe, the reservoir quantity
indicates approximately _____% full? - Answers 20%
True or False: Hydraulic system A operates the Alternate nose wheel steering? - Answers False
When is the white RF (refill) indication valid? - Answers It is only valid on the ground with both
engines shutdown or after landing with flaps up
How many hydraulic systems in the B737NG are controlled from the FO's side of the forward
overhead panel? - Answers 2
The minimum amount of fuel required for ground operation of an electric hydraulic pump is ____
pounds of fuel in the related main tank - Answers 1,675
What does moving the FLT CONTROL switch to STBY RUD activate? - Answers Activates the
standby hydraulic system pump
True or False: Grasping the Stabilizer Trim Wheel stops the electric trim from moving the
horizontal stabilizer? - Answers True
Which of the following leading edge devices are Not monitored for skew conditions? - Answers
Slats 1 and 8
Which of the following are mechanically controlled during manual reversion? (2) - Answers
Ailerons and Elevator
Hydraulic system ____ controls the normal operation of TE flaps? - Answers B
The mach trim system automatically functions above Mach___? - Answers .615
The Yaw Damper system is capable of providing which of the following?(3) - Answers Dutch roll
protection, Turn coordination and Gust Damping
