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Aircraft Systems: Vacuum Pump Operation

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Questions and Answers

What component provides suction to operate the gyros?

Pneumatic compressor

Hydraulic pump

Electric motor-driven pump

Dry-type engine-driven vacuum pump (correct)

What purpose does the suction relief valve serve in the system?

To increase engine power

To improve air filtration

To circulate cabin air

To control system pressure (correct)

How does the central air filter affect the suction gauge reading?

It increases the reading when blocked

It shows the air temperature

It decreases the reading as it becomes dirty (correct)

It causes fluctuating readings

What configuration is used to connect the vacuum pump to the engine in this system?

<p>Spline-type coupling</p> Signup and view all the answers

Where is the vacuum line routed between in the cabin?

<p>From the vacuum pump to the relief valve</p> Signup and view all the answers

Study Notes

Gyro Operation and Vacuum System

Suction for gyroscope operation is generated by a dry-type engine-driven vacuum pump.
The vacuum pump is gear-driven via a spline-type coupling, ensuring efficient power transmission.
A suction relief valve regulates system pressure and is positioned between the pump inlet and gyroscopic instruments.
Within the cabin, a vacuum line connects the gyro instruments to the relief valve, located at the firewall for easy access.
A disposable central air filter is used to maintain air quality and protect the instruments from contamination.
The vacuum unit is mounted with straps for easy replacement and maintenance, facilitating quicker service time.
The suction gauge measures the net difference in suction before and after the air has passed through the gyroscope.
As the central air filter becomes obstructed with dirt, the differential pressure indicated by the suction gauge decreases, leading to lower readings.

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Description

Test your knowledge on the operation of aircraft gyros powered by engine-driven vacuum pumps. This quiz covers key components such as the suction relief valve, vacuum line routing, and installation practices. It's essential for those studying aircraft systems or maintenance.