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Worksheetsmaterial hardware 100-150
Total questions: 51
Worksheet time: 26mins
101) Typically made to be used on clevis bolts that don’t have drilled shanks. This is refer to
A. Shear self-locking nut
B. Anchor nut
C. Tinnerman nut
102) Pitting corrosion is the result of ;
A.Two dissimilar metal contact to each other
B. Improper quenching two dissimilar metal contact to each other
C. Uniform surface corrosion left untreated.
103) Type of cable fastener that allows cable tension to be adjusted by using;
A. Turnbuckle
B. Swage terminal
C. Tensiometer
103) What is the quenching method for annealing heat treatment?
A. Cool at room temperature
B. Water.
C. Hot air/Furnace cool.
104) Hole repair can be accomplish by using;
A. Helicoil.
B. Go no go gauge
C. Quarter turn fastener
105) What is the hardness designation for H38
A. Strain hardened and stabilized & Full-hard
B. Strain hardened only & Three-quarter hard.
C. Strain hardened and partially annealed & Half-hard.
106) The white powder which forms on the surface of aluminum alloy when it corrodes is the indication of
A. Surface corrosion
B. Galvanic corrosion.
C. Oxidation.
107) Flexible hose used in aircraft system is classified in size according to the;
A. Outside diameter
B. Wall thickness
C. Inside diameter
108) In addition to prevent corrosion by its biodical action, an additive in fuel also serves as
A. An anti-freeze to prevent water from freezing
B. To prevent the formation of scum.
C. Both A and B are correct.
109) Which of the following aluminum alloys is most commonly used for aircraft structural parts requiring high strength?
A.1100.
B.2024.
C.5052
110) What is the main characteristic of magnesium alloys that makes them difficult to work at room temperature?
A.Low tensile strength.
B. High thermal conductivity.
C.Low ductility
111) Which process is used to improve the mechanical properties of aluminum after cold working?
A. Annealing
B. Heat aging.
C. Normalizing.
112) Which aluminum alloy is known for its high fatigue strength and is commonly used in aircraft applications?
6061
7075
1100
113) What is the key reason for using titanium in aerospace applications?
A) High malleability.
B) High strength-to-weight ratio.
C) Low production cost.
114) In which process are aluminum alloys heated and slowly cooled to achieve maximum softness and ductility?
A. Solution heat treatment.
B. Annealing.
C. Quenching.
115) Choose the correct answer below
A. T10 – Solution heat-treated, strain hardened and then artificially aged.
B. T5 - Annealed (cast product only).
C. T3 – Solution heat-treated followed by strain hardening .
116) Cadmium plating of surface treatment for steel is
A. Sacrificial process.
B. Electrolytic process
C. Both a and b are correct
117) What type of load generally applied to Roller bearing?
A. Radial load.
B. Thrust load.
C. Radial and thrust.
118) Below are the purpose of bearing EXCEPT?
A. Reduce friction.
B. Enhance speed and efficiency.
C. Tension and compress movement.
119) Of the listed materials listed the highest percentage of copper content is in:
7075
2024
5056
120) Which non-ferrous metal alloy is known for its high electrical conductivity and is often used for electrical wiring in aircraft?
aluminums
copper
Magnesium
121) What is the effect of natural aging in aluminum alloys after solution heat treatment?
A. Increased corrosion resistance
B. Increased strength over time.
C. Reduced hardness
122) Which aluminum alloy is primarily used for fuel tanks and pipelines in aircraft due to its excellent corrosion resistance?
A.1100.
B.7075
C.5052
123) What is the key feature of Monel metal, which makes it suitable for marine applications in aircraft?
A.Low cost.
B. High strength.
C. Excellent corrosion resistance.
124) Which material property of beryllium copper makes it suitable for use in precision bearings and spring washers?
A. High thermal conductivity
B. High tensile strength.
B. High tensile strength.
127) What is the main advantage of composite materials in aircraft structures?
A.Lower cost.
B. Higher density
C. Higher strength-to-weight ratio.
128) Which statement of rigid fluid line below is correct?
A. Used extensively on aircraft to connect stationery parts to moving parts.
B. Known as hose.
C. Used in stationary applications where long, relatively straight runs are possible.
129) What type of seal that is one way seal?
A. Gasket.
B. O-Ring packing
C. V-Ring packing
130) The application of dipping steel in the molten zinc is known as
A. Metal spraying.
B. Cadmium plating
C. Galvanizing.
131) What is Backlash?
A. Inserted between two or more other gear wheels.
B. Typically used in conveyor systems.
C. Clearance between mating components
132) What is the function of leaf spring?
A. It provides dampness and springing function for heavy vehicles .
B. Also known as spiral torsion, clock springs or brush springs
C. It is also a form of helical spring.
134) What is the key characteristic of 6061 aluminum alloy that makes it versatile for use in various aircraft components?
A) High malleability
B) Excellent corrosion resistance.
C) High electrical conductivity
135) Which non-ferrous metal is widely used in aircraft for parts requiring good wear resistance and toughness, such as bushings and bearings?
A. Copper.
B. Brass.
C. Beryllium copper
136) What is the primary reason for using titanium in aircraft parts exposed to high temperatures?
A. High strength-to-weight ratio
B. Excellent electrical conductivity
C.Low cost
137) Which of the following aluminum alloys is typically used for aircraft fuselage skin due to its high strength?
1100.
2024
7079
138) What is the primary advantage of using composite materials in aircraft construction?
A.Lower cost.
B. Higher density
C. Higher strength-to-weight ratio.
139) Which alloy is commonly used for aircraft structural rivets due to its high strength?
1101
2024
5052
140) Which material is often used for parts in aircraft engines that must withstand both high temperatures and corrosion?
A. Aluminum alloy
B. Copper alloy.
C.Titanium alloy
141) What is the primary purpose of quenching in the heat treatment of aluminum alloys?
A. Increase ductility.
B. Increase hardness and strength.
C. Reduce thermal expansion.
142) What is the primary advantage of using foam-based cleaners on vertical surfaces?
A.They provide longer dwell time and prevent dripping.
B.They improve surface gloss.
C.They are more cost-effective than liquid cleaners.
143) What is the recommended procedure for cleaning de-icing boots?
A. Wash with mild soap and water, then apply a protective conditioner.
B. Rinse with high-pressure water.
C. Immerse in solvent-based cleaners.
145) After cleaning an aircraft’s exhaust area, what should be inspected?
A.The presence of streaks or residues.
B.The condition of heat-resistant coatings and fasteners.
C.The type of cleaning agent used
149) How should cleaning sponges used for acrylic windows be maintained?
A. Rinse thoroughly and store in a sealed container
B. Dry completely to avoid mold growth.
C. Wash with kerosene to remove contaminants
