7-Airplane & System Description

Question 1

The fuselage construction design is referred to as a semi monocoque. Explain.

Answer 1

It’s a conventional formed sheet metal bulkhead (metal separating major sections), stringer and skin

Question 2

What kind of skin is used for Cessna 172s?

Answer 2

Aluminum

Question 3

How should you move the plane on the ground?

Answer 3

Most easily done with a tow bar to the nose gear strut.

If that’s not required or pushing is required, use the wing struts as push points. NOT vertical or horizontal surfaces.

Question 4

If you want to pivot the plane around the main landing gears, what do you do?

Answer 4

Press down on a tailcone bulkhead just forward of the horizontal stabilizer. NOT the skin in between the bulkheads.

Question 5

What is the shock system used for landing gear?

Answer 5

Tubular spring steel landing gear struts and the air/oil nose gear shock strut.

Question 6

Engine operation is monitored by what 3 instruments?

Answer 6

1. Oil pressure/temperature indicator.
2. Tachometer
3. Exhaust Gas Temperature (EGT) indicator

Question 7

The low oil pressure switch is connected to the Hobbs meter. When is the circuit completed?

Answer 7

The circuit from the low oil pressure switch and the Hobbs is completed when pressure exceeds 20 PSI, indicating the engine is running.

Question 8

Never lean using EGT when operating at more than what power setting?

Answer 8

Never lean using EGT when operating at more than 75% power.

Question 9

The engine should not be operated on less than how many quarts of oil?

Answer 9

Do not operate the engine on less than 5 quarts of oil. For extended flight, fill to 8 quarts.

Question 10

Briefly describe the ignition and starter system.

Answer 10

Two engine driven magnetos with 2 spark plugs each in each cylinder.

Question 11

What lights should not be used when flying through clouds or overcast.

Answer 11

Strobes and flashing beacon should not be used when flying through clouds or overcast x particularly at night.

It can cause vertigo and loss of orientation.

Question 12

What’s the rule for resetting the circuit breakers?

Answer 12

Check for indication of short circuit (smoke or odor). If none, proceed to reset:

Turn off power if possible to component receiving power.

Reset circuit breaker

Try turning power back on

If circuit breaker opens again, do not reset it.

Question 13

Which instruments are ran off the pitot-static system?

Answer 13

Ram air to: AIRSPEED INDICATOR

static pressure to:

AIRSPEED INDICATOR
VERTICAL SPEED INDICATOR
ALTIMETER

Question 14

Which instruments are ran off the vacuum system?

Answer 14

Provide suction to operate the:

ATTITUDE INDICATOR
DIRECTIONAL INDICATOR