Ground 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 risks when using the product.

Question 3

What are the safety precautions when using a drill press?

Answer 3

Clamp all work securely, stop machine before adjusting objects drilled and jammed work, turn the equipament off and clean area when finished.

Question 4

What type of fire can a CO2 extinguisher be on?

Answer 4

Class A, B & C types fires.

Question 5

Why are water type fire extinguisher not recommended on Class C Fires?

Answer 5

Possibility electrocution because water is a good conductor.

Question 6

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

Answer 6

The 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 can be exerted on the crankshaft the bend or break a connecting rod.

Question 9

What causes hydraulic lock in large radial engines?

Answer 9

Oil sweeps by 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 powerplant?

Answer 10

Use the proper checklist, position the aircraft into the Wind Check propeller and or jet intake area, secure all external power cart and use a fireguard.

Question 11

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

Answer 11

Kickback 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 the brakes on, contact is called and the switch is placed it ON. Be sure the ground is firm and do not lean into the propeller arc.

Question 13

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

Answer 13

Continue cranking to start the engine and the blow out the fire. If engine does not start and the fire continues to burn discountinue starting and have fireguard extinguish the fire.

Question 14

What is meant by the term HOT START When starting an aircraft turbine engine?

Answer 14

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

Question 15

When towing an aircraft with a tow vehicle what brakes are use it when the aircraft is to be stopped?

Answer 15

The tow vehicle breaks! The aircraft brakes should be use only in emergency conditions.

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 when the radio becomes inoperative on a tower controlled airport.

Question 17

Where are aircrafts 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

A fuel sample may have a cloudy or hazy appearance or may even contain solid slug of water, also chemical treatment of samples can detect invisible water.

Question 19

When refueling an aircraft what precautions should be taken?

Answer 19

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

Question 20

What information must be located adjanced to fuel filler openings for reciprocating engine powered airplanes built under the current airwothiness standards 14 CFR part 23.973?

Answer 20

The fuel filler openings are clearly marked with the word AVGAS and the minimum fuel grade.

Question 21

What information must be located adjanced to oil filler openings for reciprocating engine powered airplanes built under the current airwothiness standards 14 CFR part 23.1157?

Answer 21

The oil tank filler openings are clearly marked with the word OIL and the 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 engine?

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 in aircraft engine?

Answer 24

Only with FAA approval, such as with supplemental type certificate(STC).

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 may be damaged or destroyed.

Question 26

What are some typical ground operation (engine runup and/or taxi) hazards to watch for or take precautions against?

Answer 26

(1) FOD
(2) Other aircraft
(3) Noise Levels
(4) Hydraulic Lock
(5) The possibility of Fire
(6) Jet Blast and Jet Intake Areas.

Question 27

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

Answer 27

Octane Rating. LL(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 ensure apropriate lubrification on initial startup