Airframe

Question 1

What is another name for GTA welding?

Answer 1

TIG welding

Question 2

What is used as the electrode in GTA welding?

Answer 2

tungsten wire

Question 3

What are the three types of power that can be used for GTA

Answer 3

DC straight polarity
DC reverse polarity
AC

Question 4

Which type of power provides the greatest heat and deepest penetration in GTA welding?

Answer 4

DC straight polarity

Question 5

Which type of power is used for GTA welding aluminum and magnesium?

Answer 5

DC reverse polarity

Question 6

Should a riveted joint fail in shear or in bearing?

Answer 6

Shear

Question 7

Most important consideration when selecting materials for a sheet metal repair?

Answer 7

Material must duplicate the strength of the original structure

Question 8

why should aluminum alloy rivets be driven with as few blows as is practical?

Answer 8

prevents work hardening the rivet and making them harder to drive

Question 9

what determines whether a piece of sheet metal should be dimpled or countersunk when installing flush rivets?

Answer 9

Thickness of the sheet.
(countersinking should be done only when the thickness of the sheet is greater than the thickness of the rivet head.)

Question 10

what should be done to protect a riveted joint between aluminum alloy and magnesium alloy from corrosion.

Answer 10

coat surface and dip rivets in corrosion inhibiting primer.
(drive them while wet)

Question 11

what is the purpose of the beehive spring on a rivet gun?

Answer 11

holds the rivet set in the gun and allows the gun to vibrate the set

Question 12

what must be done to an aircraft fuel tank before it can be repaired by welding?

Answer 12

purge gas fumes for 30 minutes by:
steam
soaking in hot water
filling with nitrogen
filling with C02

Question 13

when drilling out rivets on an airplane or drilling holes for a repair, what precaution should be taken?

Answer 13

don’t allow drill to enter space behind the structure

Question 14

what are two advantages of laminated construction over riveted sheet metal?

Answer 14

light weight
&
rigidity

Question 15

what are two popular types of CORE material used in laminated structure?

Answer 15

foam & honeycomb

Question 16

what are two popular types of MATRIX material used in laminated structures?

Answer 16

polyester & epoxy resins

Question 17

what are the two parts of a polyester matrix material?

Answer 17

resin & catalyst

Question 18

what are the two parts of an epoxy matrix material?

Answer 18

Resin & hardener

Question 19

what are the three materials that may be used to reinforce the matrix material for aircraft structure?

Answer 19

fiberglass
Kevlar
graphite

Question 20

what is meant by a uni-directional fabric?

Answer 20

major fibers run in same direction

Question 21

what is meant by ribbon direction of a honeycomb material?

Answer 21

the direction in a piece of honeycomb material that is parallel to the length of the strips that make up its core

Question 22

what kind of repair can be made to a small damage of the core material and one face sheet of a piece of aluminum alloy honeycomb structure?

Answer 22

potted compound repair

Question 23

how do you grind the point of a twist drill that is to be used for drilling transparent acrylic material?

Answer 23

cutting edge to a ZERO rake angle

angle of the tip 140

Question 24

what is a warp clock in a structural repair manual?

Answer 24

an alignment indicator for orientation of the plies

Question 25

what are two types of repair to a damaged honeycomb core composite material?

Answer 25

room temperature cure repair hot-bond repair

Question 26

if a mechanic gives a 100 hour inspection to an aircraft that proves to be unairworthy, what must the mechanic give the owner or operator of the aircraft?

Answer 26

signed & dated list of all the discrepancies that keep the plane from being airworthy

Question 27

where can you find the recommended statement to use for recording the approval or disapproval of an aircraft for return to service after a 100 hour?

Answer 27

14 CFR 43.11

Question 28

under what conditions can an aircraft be operated with a 100 hour overdue?

Answer 28

no more than 10 hours after inspection is due for the purpose of flying to a place for inspection

Question 29

for how long can an aircraft be operated if a 100 hour is overdue?

Answer 29

10 hours, which must be subtracted from when the next inspection is due

Question 30

under what condition can an aircraft due for an annual inspection be operated?

Answer 30

only with a special flight permit

Question 31

what certification is required for a mechanic to be able to approve an aircraft for return to service after a 100 hour inspection?

Answer 31

A&P

Question 32

what determines whether or not an aircraft must be given a 100 hour inspection?

Answer 32

if they carry persons for hire & flight instruction for hire

Question 33

what is the difference between an annual inspection and a 100 hour?

Answer 33

the inspections are identical. only an I.A can do an annual

Question 34

what certification is required for a mechanic to conduct an annual inspection and approve the aircraft for return to service

Answer 34

inspection authorization (IA)

Question 35

what is a progressive inspection?

Answer 35

Same as an annual, but performed on a schedule not requiring the plane to go out of service

Question 36

what certification is required for a mechanic to conduct a progressive inspection?

Answer 36

Inspection authorization (IA)

Question 37

where can you find the requirements for inspecting the altimeter and static systems of an aircraft operated under instrument flight rules?

Answer 37

14 CFR part 43 appendix E

Question 38

where can you find the requirements for inspecting the ATC transponder?

Answer 38

14 CFR part 43 appendix F

Question 39

what items must be inspected on a helicopter in accordance with the instructions for continued airworthiness?

Answer 39

1 drive shafts, 2 main rotor 3 main rotor center section 4 auxiliary rotor 5 transmission gear box,

Question 40

where would an aviation mechanic find required special inspections?

Answer 40

aircraft maintenance manual

Question 41

what are the three basic brake actuating systems?

Answer 41

power break system (only uses hydraulic system) independent system (doesn't use hydraulic system) booster system (hydraulic system intermittently)

Question 42

what would cause the warning horn to sound when the throttles are pulled back reducing the engine power for landing?

Answer 42

if landing gears are not down and locked

Question 43

what is indicated by a red light in the landing gear position indication portion of the annunciator panel?

Answer 43

landing gear is not in a safe condition for landing

Question 44

what information is given to a pilot to indicate that all of the landing gears are down and locked?

Answer 44

3 green lights

Question 45

is a Chevron seal a one way or two way seal?

Answer 45

one way

Question 46

which side of a Chevron seal should the pressure be applied?

Answer 46

the open side

Question 47

is an O-ring seal a one way or two way seal?

Answer 47

2 way

Question 48

how can you be sure of getting an O-ring made of the correct material for a specific hydraulic component?

Answer 48

correct part number

Question 49

on which side of an O-ring should the back up ring be placed?

Answer 49

on the side away from the source of pressure

Question 50

what should be done to the sharp edges of threads and actuator pistons when installing O-rings?

Answer 50

cover with paper

Question 51

what are the two main gases that make up our atmosphere

Answer 51

oxygen nitrogen

Question 52

what is used to check an oxygen system for leaks?

Answer 52

leak detector liquid that is a form of non-oily soap

Question 53

why must fittings in an oxygen system not be tightened to stop a leak when there is pressure on the system?

Answer 53

the tube is expanded slightly when pressurized

Question 54

what kind of gaseous oxygen must be used to service an aircraft oxygen system?

Answer 54

aviators breathing oxygen (no moisture)

Question 55

what identification must be stamped on an oxygen bottle carried in an aircraft?

Answer 55

indentification DOT 3AA or 3HT date of manufacture date of hydrostatic tests

Question 56

to what pressure and how often should DOT 3AA oxygen cylinders be hydrostatically tested?

Answer 56

5/3 of their working pressure every 3 years

Question 57

to what pressure and how often should DOT 3HT oxygen cylinders be hydrostatically tested, and when should the be retired from service?

Answer 57

tested to 3083 psi every three years retired after 15 years or 4380 pressurizations

Question 58

what kind of lubricant can be used for installing fitting in an oxygen system component?

Answer 58

Teflon tape or special water base lubricant

Question 59

what is used to check for leaks after replacing a fitting in an oxygen system?

Answer 59

special leak detector liquid that is non-oily soap

Question 60

what cleaning solutions can be used to clean parts used in an oxygen system?

Answer 60

anhydrous ethyl alcohol isopropyl alcohol, freon

Question 61

what may be used to dry components in an oxygen system after the have been cleaned?

Answer 61

water pumped dry nitrogen

Question 62

what may be used to purge the lines in an oxygen system after it has been opened for servicing?

Answer 62

water pumped dry nitrogen

Question 63

what must be done before any maintenance can be done on an oxygen system?

Answer 63

the oxygen supply must be turned off at the bottle valve

Question 64

how is the heat removed from an aircraft cabin with the vapor cycle air conditioning system?

Answer 64

cabin heat is absorbed by the refrigerant in the evaporator, then carried outside the aircraft where it is given up to the outside air in the condensor

Question 65

what produces the cool air in the vapor cycle air conditioning system?

Answer 65

cabin heat is absorbed by the refrigerant in the evaporator, the air that leaves the evaporator is cool

Question 66

what is used as the refrigerant in a vapor cycle air conditioning system?

Answer 66

freon type liquid (refrigerant 12) or more environmentally friendly R-134a

Question 67

what is the state of the refrigerant as it leaves the compressor?

Answer 67

high pressure gas

Question 68

what is the state of the refrigerant as it leaves the condenser?

Answer 68

high pressure liquid

Question 69

what is the state of the refrigerant as it leaves the thermostatic expansion valve?

Answer 69

low pressure liquid

Question 70

what is the state of the refrigerant as it leaves the evaporator?

Answer 70

low pressure vapor

Question 71

how is the compressor lubricated?

Answer 71

refrigeration oil is mixed with the refrigerant

Question 72

what is the function of the thermostatic expansion valve?

Answer 72

meters just enough liquid refrigerant into the evaporator that all of it will be evaporated when it leaves the evaporator coils

Question 73

how is refrigerant put into the system?

Answer 73

through service valves on the low side of the system using a manifold gauge set

Question 74

how should the components in the low side of a properly operating vapor cycle cooling system feel?

Answer 74

cool

Question 75

how is a vapor cycle cooling system checked for refrigerant leaks?

Answer 75

hold probe of an electronic leak detector below any suspected leak, tone will sound

Question 76

what safety equipment should be worn when charging a vapor cycle cooling system?

Answer 76

safety face shield

Question 77

what are the two types of air conditioning systems that may be installed on an aircraft?

Answer 77

air cycle vapor cycle

Question 78

why is a fuel jettisoning or dump system required for some aircraft?

Answer 78

to lower gross weight to allowable landing weight

Question 79

what is used as the sensor in the fuel tank for an electronic type fuel quantity indicating system?

Answer 79

tubular capacitors extend across the fuel tank from top to bottom

Question 80

what is the principle upon which the electronic type fuel quantity indicating system operates?

Answer 80

tubular capacitors change their capacitance as fuel level changes.

Question 81

what is used as a sensor in the fuel tank for the older resistance type fuel quantity indicating system?

Answer 81

Variable resistor arm is moved by float

Question 82

what is the purpose of a drip gauge in the fuel tank of a large aircraft?

Answer 82

you can check fuel level from the bottom of the tank

Question 83

when must the fuel quantity indicating system indicate zero?

Answer 83

during level flight when fuel in tank is equal to unusable fuel supply

Question 84

what size generator must be used in an aircraft electrical system if the connected electrical load is 30 amp, and there is no way of monitoring the generator output?

Answer 84

the load must be no more that 80% of the rated output. 37.5 (practically a 40 amp generator would be used)

Question 85

what is meant by flashing the field of a generator?

Answer 85

restoring residual magnetism to the frame of the generator. By passing current through the coils in the direction it normally flows when operating.

Question 86

what is meant by paralleling the generators in a multi engine aircraft?

Answer 86

adjusting voltage regulators so all the generators share the load equally

Question 87

what are the three types of voltage regulators used with aircraft generators?

Answer 87

vibrator carbon pile solid state

Question 88

what is meant by a trip free circuit breaker?

Answer 88

If there's a fault in the system the circuit breaker won't close

Question 89

what is meant by slow blow fuse?

Answer 89

fuse will allow more current that its rating to flow for a short period of time

Question 90

what is the function of a fuse or circuit breaker in an aircraft electrical circuit?

Answer 90

protects wiring from excess current. Will open the circuit if enough current flows to heat the wire

Question 91

what are two principles upon which circuit breakers operate?

Answer 91

magnetic circuit breakers thermal circuit breakers

Question 92

what circuit in an aircraft electrical system is not required to have a circuit protective device?

Answer 92

main circuit for starter motors used for starting only

Question 93

is an automatic reset circuit breaker approved for aircraft electrical circuits?

Answer 93

No. Manual only.

Question 94

how does a vibrator type voltage regulator maintain a constant voltage?

Answer 94

when voltage rises above desired value, electromagnetic relay opens and inserts a resistor in the generator field circuit

Question 95

what two components are normally housed with a vibrator voltage regulator in a single unit generator control?

Answer 95

current limiter reverse current cutout relay

Question 96

what two frequencies does the emergency locator transmitter operate?

Answer 96

121.5 megahertz 243.0 megahertz

Question 97

where is the ELT transmitter normally located?

Answer 97

In the tail or as far aft as possible

Question 98

how often should ELT batteries be replaced or recharged?

Answer 98

after 1 hour of cumulative use at battery expiration date when 50% of their useful life has expired

Question 99

how can you know when an ELT batter must be replaced?

Answer 99

date marked on the outside of the transmitter

Question 100

how often must ELTs be inspected for proper installation, battery corrosion, operation of the controls and sensor, and the presence of the radiated signal?

Answer 100

every 12 calendar months

Question 101

what causes and ELT to actuate?

Answer 101

and inertia switch that detects an impact parallel to the longitudinal axis of the aircraft

Question 102

how is an ELT tested to determine that its working?

Answer 102

actuate the test switch and listen on 121.5 or 243.0 MHz. during the first 5 minutes of the hour. Only operate for 3 sweeps