Operation and Servicing

Question 1

Why is a tire cage recommended when inflating aircraft tires?

Answer 1

To prevent possible personal injury, due to the tire or wheel fail

Question 2

What is a material safety data sheet?

Answer 2

Chemical information sheet explaining health and safety risk when using the product

Question 3

What are the safety precautions when using a drill press?

Answer 3

Clamp all work securely, stop the machine before adjusting objects, turn the equipment off and clean the area when finished

Question 4

What type of fire can a CO2 extinguisher be used on?

Answer 4

Class A, B, and C type fires

Question 5

Why are water type fire extinguishers not recommended on the Class C fires?

Answer 5

Possibly electrocution because of water is a good conductor

Question 6

What type of knots are used when using rope to secure light aircraft?

Answer 6

Bowline

Question 7

What procedure should be followed before starting a radial engine to detect liquid (hydraulic) locking the cylinders?

Answer 7

Pull the propeller through three or four complete revolutions by hand to detect hydraulic lock

Question 8

What damage is most likely to result from liquid lock?

Answer 8

Sufficient force to be exerted on the crankshaft to bend or break a connecting rod

Question 9

What causes hydraulic lock in large radial engines?

Answer 9

Oil seeps from the piston rings and accumulates in the combustion chamber of lower cylinders

Question 10

What are the physical and safety requirements for starting and running a power plant?

Answer 10

Using proper checklist, positioned the aircraft into the wind, check propeller or jet intake area, secure all external power carts, and use a fire guard

Question 11

Why are their fingers not curled over the prop when hand propping an engine?

Answer 11

Kick back from the engine may break them or draw your body into the blades path

Question 12

What are the starting safety procedures when hand propping a small engine?

Answer 12

Fuel on, switch off, throttle closed and brakes on. Contact is called and the switch is placed on. Be sure the ground is firm and do not lean into the propeller arc.

Question 13

What is meant by the term hot start when starting an aircraft turbine engine?

Answer 13

It occurs when the engine operating temperature exceeds the specified limits during start

Question 14

What is the procedure for extinguishing reciprocating engine induction system fires during starting?

Answer 14

Continue cranking to start the engine and blow out the fire. If engine does not start in the fire and continues to burn, discontinue starting and have a fire guard extinguish the fire.

Question 15

When towing aircraft with a tow vehicle, what brakes are used when the aircraft needs to be stopped?

Answer 15

The tow vehicle brakes

Question 16

Why should aviation mechanics know standard light signals?

Answer 16

Standard light signals may be used for taxi control when taxing aircraft without a radio, or the radio becomes in operative on a tower controlled airport

Question 17

Where are aircraft hand signals published?

Answer 17

AIM – aeronautical information manual

Question 18

How do you determine the presence of water in aircraft fuel when draining fuel sumps?

Answer 18

Your sample may have a cloudy or hazy appearance - also chemical treatment of samples can detecting invisible water

Question 19

When refueling an aircraft, what precautions should be taken?

Answer 19

Use the correct fuel, properly ground the aircraft and refueling unit, protect the aircraft surfaces from hose or nozzle damage

Question 20

What information must be located adjacent to fuel filler openings for reciprocating engine powered airplanes built under the current airworthiness standards 14 CFR Part 23.973?

Answer 20

The fuel filler openings are currently marked with the word AVGAS with a minimum fuel grade

Question 21

What information must be located adjacent to Oil filler openings for reciprocating engine powered airplanes built under the current airworthiness standards 14 CFR Part 23.1157?

Answer 21

The oil tank filler openings are clear marked with the word OIL and the permissible oil designations or references for the airplane flight manual for permissible oil designations

Question 22

What are the results of using aviation gasoline in turbine engines?

Answer 22

A limit operation may be allowed by the manufacturer, continuous use may cause loss in engine efficiency due to accumulation of lead deposits on the turbine blades and possible engine damage

Question 23

What is the possible result of operating an engine with a lower grade of gasoline than specified?

Answer 23

Loss of engine power, the probability of overheating and engine damage due to detonation

Question 24

May automotive gasoline be used an aircraft engines?

Answer 24

Only with FAA approval, such as a supplemental Type certificate

Question 25

If a mixture of aviation gasoline and Jet fuel is used in a reciprocating aircraft engine what are the possible results?

Answer 25

AVGAS contaminated by jet fuel must not be used in piston engines. The engine will be damaged or destroyed

Question 26

What are some typical ground operation such as engine run up and taxi hazards to watch for take precautions against?

Answer 26

FOD, other aircraft, noise levels, hydraulic lock, the possibility of fire, jet blast and jet intake areas

Question 27

What does the number 100 refer to in 100 LL aviation gasoline?

Answer 27

Octane rating and LL means low lead

Question 28

Under what conditions should a reciprocating engine be pre-oiled?

Answer 28

Prior to starting a new engine or one that has been preserved for storage. This insurers appropriate lubrication on initial start up.