Hydraulics Flashcards

1
Q

The number 2 standby hydraulic pressure gauge displays what?

A

Number 2 SPU output pressure.

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2
Q

What are the outboard roll spoilers powered by?

A

The number 2 hydraulic system

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3
Q

The standby power units are powered by what?

A

115 V a.c.

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4
Q

Does the engine Driven pump have a pressure gauge?

A

No

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5
Q

Illumination of the number #2 SPU auxiliary power caution light indicates what?

A

The quality of power from one or more sources is unacceptable

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6
Q

A fully charged emergency brake accumulator will allow approximately how many brake applications?

A

Eight

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7
Q

What are the main wheel brakes powered by?

A

The number one hydraulic system

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8
Q

What is the Rudder lower actuator powered by ?

A

The number one hydraulic system

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9
Q

The emergency hydraulic system receives pressure for main landing extension from what?

A

Hand pump

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10
Q

Power transfer unit operation as indicated by what?

A

By illumination of the PTU select switch light

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11
Q

What is the wing flaps powered by?

A

Number one hydraulic system

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12
Q

Which hydraulic system is the landing gear powered by?

A

Number two hydraulic system

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13
Q

Illumination of the number one engine hydraulic pump caution light indicates what?

A

The output of the EDP is below 2000 PSI

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14
Q

What is the nominal pressure of the main hydraulic system?

A

3000 PSI

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15
Q

Minimum Dispatch of the number to hydraulic system Fluid quantity is what?

A

3.0 QTS

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16
Q

Hydraulic quantity and pressure indicators are located where?

A

Copilots instrument panel

17
Q

The park brake pressure gauge displays what?

A

Pressure in the park brake accumulator

18
Q

The standby power units output a nominal psi of what?

A

2750 PSI

19
Q

The number 2 standby hydraulic pressure gauge displays what?

A

Number 2 SPU output pressure

20
Q

How many main hydraulic systems are there in the aircraft?

A

Two.

21
Q

The PTU operates automatically

in the event of a ?

A
No. 2 engine
failure when the landing gear is
selected up.
The PTU can also be manually
selected ON
22
Q

An engine driven pump operates
each system and is located on
the ?

A

the rear face of the propeller

reduction gearbox.

23
Q

If pressure in the system exceeds ?

A

3250 psi, a pressure relief valve
opens until pressure decreases
to 3150 psi.

24
Q
An electrically actuated shutoff
valve is installed in the delivery
line between the reservoir and
the engine driven pump.
Operation of the valve is
controlled by ?
A
PULL FUEL OFF handle on the
fire protection panel.
The shutoff valve is powered by
the hot battery bus. The handle is
pulled to energize the valve
closed in the event of an engine
failure, fire, or for maintenance
25
Q

Indication of the No.1 or No.2
hydraulic system fluid
overtemperature is provided by ?

A

the associated HYD FLUID HOT

caution light.

26
Q

In the NORM position, the
standby hydraulic pumps operate
automatically when ?

A

automatically when the flaps are
selected to greater than 0
degrees.

27
Q
The Alternate Rudder Power
System, or ARPS, provides
hydraulic power to the No 2
rudder actuator in the event that
the No. 2 system loses fluid, or
both hydraulic systems fail.
This is accomplished by ?
A

the rearward location of the No. 2
Standby Power Unit (SPU) and a
Rudder Shutoff Valve (RSV).

28
Q

The No. 2 standby pump will also
be energised automatically in the
following situations: ?

A
- The engine driven pump (EDP)
low pressure switch senses less
than 2000psi, and
- A low pressure switch in the
rudder shutoff valve sensing less
than 20psi in the return line
29
Q
Due to its critical nature the #2
Standby pump has two sources
of power.
During normal operations the #2
SPU operates from the ?
A

Left AC bus, while the Right AC bus

supplies power as a backup.

30
Q

The PT provides hydraulic
pressure to the entire #2 system
At ?

A

at 2,700psi with a maximum flow

rate of 4.5 US gal per minute.

31
Q

The primary purpose of the PTU

is allow for ?

A

allow for prompt landing gear
extension and retraction in the
event of a No. 2 engine failure.

32
Q

The PTU activates automatically

in response to ?

A

the loss of No. 2
engine oil pressure, decreasing
below 50 psi, and a landing gear
up selection.

33
Q

The Emergency Hydraulic system

consists of ?

A

of a manually operated
hand pump and independent
reservoir.