1(8239) If the right wing of a monoplane is improperly rigged to a greater angle of incidence than designated in the manufacturer's specifications, it will cause the
airplane to be off balance both laterally and directionally
2(8216) The acute angle formed by the chord line of a wing and the relative wind is known as the
angle of attack
3(8014) Compression failures in wood aircraft structures are characterized by buckling of the fibers that appear as streaks on the surface
at right angles to the grain
4(8011) Laminated wood is sometimes used in the construction of highly stressed aircraft components. This wood can be identified by its
Parallel grain construction
5(8012) When patching a plywood skin, abrupt changes in cross-sectional areas which will develop dangerous stress concentration should be avoided by using
circular or elliptical patches
6(8021) The strength classification of fabrics used in aircraft covering is based on
tensile strength
7(8302) For an individual (not a repair station) to conduct a complete 100-hour inspection on an aircraft and approve it for return to service requiers a mechanic certificate with
airframe and powerplant ratings
8(8303) Where would you find the operating conditions that make a 100-hour inpsection mandatory
14 CFR Part 91
9(8193) The oxyacetylene flame used for aluminum welding should
be neutral and soft
10(8182) The oxyacetylene flame for silver soldering should be
neutral
11(8185) What method of repair is recommended for a steel tube longeron dented at a cluster?
welded patch plate
12(8191) Why should a carburizing flame be avoided when welding steel?
it hardens steel
13(8202) Why are aluminum plates 1/4 inch or more thick usually preheated before welding?
Reduces internal stresses and assures more complete penetration
14(8318) A brake debooster valve is installed in systems where the high pressure of the hydraulic system (3,000 psi) is used to operate brakes
that are designed to work with lower pressure
15(8333) When an air/oil type of landing gear shock strut is used, the initial shock of landing is cushioned by
the fluid being forced through a metered opening
16(8322) Debooster valves are used in brake systems primarily to
reduce the pressure and release the brakes rapidly
17(8357) If a brake debooster is used in a hydraulic brake system, its position in the system will be
between the brake control valve and the brake actuating cylinder
18(8308) To prevent a very rapdi extension of an oleo shock strut after initial compression resulting from landing impact,
various types of valves or orifices are used which restrict the reverse fluid flow
19(8326) Power boost brake systems are used on aircraft that have
high landing speeds
20(8309) A pilot reports the right brake on an aircraft is spongy when the brake pedal is depressed in a normal manner. The probable cuase is
air in the brake hydrualic system
21(8316) If it is determined that spongy brake action is not caused by air in the brake system, what is the next most likely cuase?
deteriorated flexible hoses
22(8494) A loud hammering noise in a hydrualic system that has an accumulator usually indicates
too low or no preload in the accumulator
23(8493) a common cause of slow actuation of hydrualic components is
internal leakage in the actuating unit
24(8389) Select the valve used in a hydrualic system that directs pressurized fluid to one end of an actuating cylinder and simultaneously directs return fluid to the reservoir from the other end
selector
25(8441) Excluding lines, which components are required to make up a simple hydraulic system?
pump, reservoir, selector valve, and actuator
26(8496) In a typical high-pressure pneumatic system, if the moisture separator does not vent accumulated water when the compressor shuts down, a likely cause is a
malfunctioning solenoid dump valve
27(8386) To protect seals from damage when installed over a threaded sectino, the threaded section should be
covered with a suitable sleeve
28(8400) What is the purpose of using backup rings with O-rings in hydrualic systems above 1,500 psi?
prevent high pressure from extrudiong the seal between the moving and stationary part
29(8406) Extrusion of an O-ring seal is prevented in a high-pressure system by the use of a
backup ring on the side of the O-ring away from the pressure
30(9023) In some fire0extinguishing systems, evidence that the system has been intentinally discharged is indicated by the absence of a
yellow disk on the side of the fuselage
31(9028) A squib, as used in a fire-protection system, is a
device for causing the fire-extinguishing agent to be released
32(9008) Light refraction smoke detectors are activated when the detector
senses light reflected from smoke particles passing through a chamber
33(8971) What is one check for proper operation of a pitot-static tube heater after replacement?
Ammeter reading
34(8985) Which of the follwoing connects vacuum to the deicer boots when the system is not in operation, to hold the boots tightly against the leading edges in flight
distributor valve
35(8978) What method is usually employed to control the temperature of an anti-icing system using surface combustion heaters?
Thermo-cycling switches
36(8874) Bonding connections should be tested for
resistance value
37(8853) Aircraft fuse capacity is rated in
amperes
38(8864) The nominal rating of electrical switches refers to
current rating with the contacts closed
39(8902) When using an ohmmeter to check the continuity of a generator field coil, the coil should
show very low resistance if it is a series field coil
40(8875) What kind of switch should you install in a single wire circuit that required the swithc to be manually held in the ON position?
Single-pole, single throw (SPST), two-position normally open (NO)
41(8868) The navigation lights of some aircraft consist of a single circuit controlled by a single switch which has an ON position and an OFF position, with no additional positions possible. This switch is referred to as a
Single-pole, single throw (SPST), two-position switch
42(8694.7) (Refer to Figure 28.) What kind of antenna is this?
An ELT antenna
43(8650) IN which control element of an autopilot system is an attitude indicator?
sensing
44(8785) Why are centrifugal-type boost pumps used in fuel systems of aircraft operating at high altitude?
to supply fuel under pressure to engine-driven pumps
45(8711) The use of turbine fuels in aircraft has resulted in some problems not normally associated with aviation gasolines. One of these problems is
microbial contaminants
46(8787) According to Part 23, what minimum required markings must be placed at or near each appropriate fuel filler cover for reciprocating engine-powered airplanes?
The word "Avgas" and the minimum fuel grade
47(8701) Which of the following is employed to maintain lateral stability when jettisoning fuel?
two separate independent systems
48(8700) The fuel jettison valve must be designed to allow flight personnel
to close the valve at any time and the fuel must discharge clear of the aircraft
49(8786) Why is it necessary to vent all aircraft fuel tanks?
to limit pressure differential between the tank and atmosphere
50(8757) What unit would be adjusted to change the fuel pressure warning limits?
pressure-sensitive mechanism
51(8713) Which of the following precautions is most important during refueling operations?
fuel to be used must be appropriately identified
52(8710.7) a transducer in a fuel pressure system serves what function?
converts fluid pressure directly through a transmitter to the indicator
53(8791) Some turbine powered aircraft have a fuel temperature indicator located in the cockpit to
monitor the fuel temperature during high altitude flight
54(8532) The position of the thermostatic expansion valve in a vapor-cycle cooling system is determined by temperature and pressure of the
freon in the outlet of the evaporator
55(8570) In a hihg-pressure oxygen system, if the pressure reducer fails, what prevents high-pressure oxygen from entering the system downstream?
pressure relief valve
56(8547) The cabin pressurization modes of operation are
differential, unpressurized, and isobaric
57(8511) Frost or ice buildup on a vapor-cycle cooling system would most likely be caused by
inadequate airflow through the evaporator
58(8536) When servicing an air conditioning system that has lost all of its freon, it is necessary to
check oil and add as necessary, evacuate the system, and add freon
59(8535) Which prevents a sudden loss of pressurization in the event that there is a loss of pressurization source?
delivery air duct check valve
60(8497) Which sectino of a turbine engine provides high pressure bleed air to an air cycle machine for pressurization and air conditioning?
Low or high pressure compressor
61(8499) In a freon vapor-cycle cooling system, where is cooling air obtained for the consdensor?
ambient air
62(8560) the purpose of a subcooler in a vapor-cycle cooling system is to
cool the freon to prevent premature vaporization
63(8502) In the combustion heater, the combustion air system, what prevents too much air from entering the heaters as air pressure increases?
either a combustion air relief valve or a differential pressure regulator
64(8507) What component might possibly be damaged if liquid refrigerant is introduced into the low side of a vaport-cycle cooling system when the pressure is too high or the outside air temperature is too low?
Compressor
65(8552) what is the condition of the refrigerant as it enters the evaporator of a vapor-cycle cooling system?
low-pressure liquid
66(8520) Where does the last stage of cooling in an air-cycle air conditioning system occur
expansion turbine
67(8554) What is the condition of the refrigerant as it leaves the evaporator of a vapor-cycle cooling system?
low-pressure vapor
68(8561) a small amount of water in a vapor cycle cooling system can freeze
in the expansion valve and stop the entire system operation
69(8555) What is the condition of the refrigerant as it leaves the condenser of a vapor-cycle cooling system
high-pressure liquid
70(8559) In an operating vapor-cycle cooling system, if the two lines connected to the expansion valve are essentially the same temperature, what does this indicate?
the expansion valve is not metering freon properly