Ground Operations

Question 1

What special precautions should be taken when towing an aircraft that is equipped with a steerable nose wheel?

Answer 1

Be sure that the nose wheel does not try to turn past its stops. Some aircraft require the torsion links on the nose wheel strut to be disconnected when towing.

Question 2

What publication lists the standard hand signals used for directing a taxiing aircraft?

Answer 2

ASA-AMT-G, General textbook, page 629.

Question 3

What action should a mechanic take while taxiing an aircraft on a runway if the tower shines a flashing red light at him?

Answer 3

Taxi the aircraft clear of the runway in use.

Question 4

What type of fire extinguisher is best suited for extinguishing an induction fire in a reciprocating engine?

Answer 4

Carbon dioxide (CO2).

Question 5

What is proper way to extinguish an induction system fire that occurs when starting a reciprocating engine?

Answer 5

Keep the engine running, which will blow the fire out. If this does not work, use a CO2 fire extinguisher directed into the carburetor air inlet.

Question 6

When starting an aircraft engine equipped with a float carburetor, in what position should the carburetor heat control be placed?

Answer 6

In the Cold position.

Question 7

What is meant by a liquid lock in the cylinder of an aircraft engine, and how is it cleared?

Answer 7

Oil accumulates in the cylinders below the center line of the engine and prevents the piston from moving to the top of its stroke. To clear a liquid lock, remove one of the spark plugs and turn the engine crankshaft until all of the oil is forced out of the cylinder.

Question 8

What is the procedure if a hung start occurs when starting a turbojet engine?

Answer 8

Terminate the starting operation and find the reason the engine would not accelerate as it should.

Question 9

How far ahead of an idling turbojet engine does the danger area extend?

Answer 9

25 feet.

Question 10

Why is it important that the aircraft and the fuel truck be grounded together before the aircraft is fueled?

Answer 10

Grounding prevents the buildup of static electricity that causes sparks that could ignite the fuel vapors.

Question 11

What information must be located near the fuel tank filler opening in an aircraft powered by a reciprocating engine?

Answer 11

The word “Avgas” the minimum fuel grade.

Question 12

What information must be located near the fuel tank filler opening in an aircraft powered by a turbine engine?

Answer 12

The words “Jet Fuel” the permissible fuel designations, or references to the Airplane Flight Manual (AFM) for permissible fuel designations; additionally, for pressure fueling systems, the maximum permissible fueling supply pressure and the maximum permissible defueling pressure.

Question 13

What should be done to a reciprocating engine fuel system if turbine fuel is inadvertently put into the tanks and the engine is run?

Answer 13

The entire fuel system must be drained and flushed with gasoline, the engine given a compression check, and all of the cylinders given a borescope inspection. The oil must be drained and all of the filters and strainers checked. After the aircraft is properly fueled, the engine must be given a proper run-up and check.

Question 14

What precaution must be observed regarding the tools used when servicing an aircraft oxygen system?

Answer 14

Be sure that there is no oil or grease on the tools. Pure oxygen can cause spontaneous combustion of petroleum products.

Question 15

What kind of rope is best to tie down an aircraft?

Answer 15

Nylon or polypropylene.

Question 16

What kind of knot is used for securing an airplane with a rope?

Answer 16

Bowline.

Question 17

Why is it important that turbine fuel not be mixed with aviation gasoline used in an aircraft reciprocating engine?

Answer 17

The turbine engine fuel will cause the engine to detonate severely.

Question 18

What grade of aviation gasoline is dyed blue?

Answer 18

Low-lead Grade-100.

Question 19

What damage is likely to occur if an aircraft reciprocating engine that is designed to use grade 100 fuel is operated with grade 80 fuel?

Answer 19

Detonation will occur, leading to bent connecting rods, burned pistons, and cracked cylinder heads.

Question 20

What is meant by detonation in an aircraft reciprocating engine?

Answer 20

Detonation is an uncontrolled burning of the fuel in the cylinder of an engine. It is an explosion, rather than a smooth burning.

Question 21

What is the danger of using fuel that vaporizes too readily?

Answer 21

Vapor lock can occur in the fuel lines. This will shut off the flow of fuel to the engine.

Question 22

What type of fuel is Jet-A?

Answer 22

A fuel with a heavy kerosene base, a flash point of 110-150°F, a freezing point of -40°F, and a heat energy content of 18,600 BTU/pound.

Question 23

What are two functions of tetraethyl lead that is added to aviation gasoline?

Answer 23

It increases the critical pressure and temperature of the fuel, and it acts as a lubricant for the valves.

Question 24

What documentation is required for a certificated aircraft to legally operate on automotive gasoline?

Answer 24

There must be a Supplemental Type Certificate for the aircraft to operate on automotive gasoline.