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  Câu 1:  Hardness of material 
A Enables a material to resist penetration, wear or cutting. 
B The property of a metal which allows it to be reshaped. 
C The property of a metal which allows it to be deformed without breaking. 
D The property of metal that enables it to withstand force over a period of time.  Câu 2: 
The applications of Low Alloy Steels is (are)  A Landing gears 
B Flap ball screwsC Flap tracks  D All are correct  Câu 3: 
The properties of High Alloy Steel is (are) 
A Corrosion resistance, anti-chafing, wear resistance  B High hardness  C High strength  D All are correctt  Câu 4:  In a steel alloy, manganese:  A Increases the brittleness. 
B Produces a clean, tough and uniform metalC Acts as a hardener.  D All are correct  Câu 5:  The properties of titanium  A High strength  B High corrosion resistance  C Good heat resistance  D All are correct  Câu 6: 
Clading of aluminium alloy means 
A Permanently weld aluminium alloy layers onto pure aluminium sheet under  highpressure 
B Permanently weld pure aluminium layers onto aluminium alloy sheet under  highpressure 
C Permanently attach aluminium alloy layers onto pure aluminium sheet with rivets 
D Permanently weld pure aluminium layers onto aluminium alloy sheet with rivets 
Câu 7: Which type of pen CAN NOT be used to make the marks on aluminium material?  A Ball point pen  B Pencil  C Marker pen  D All are wrong  Câu 8: 
Corrosion of matellic metarials 
A Occurs due to the tendency of most metals, to return to their  natural state 
B By combining with the atmospheric oxygenC Both A & B are  correct  D Both A & B are wrong  Câu 9: 
Which condition(s) can increase the rate of corrosion      A Low temperature  B High temperature  C Air ventilated area  D B & C are correct  Câu 10: 
How to prevent corrosion of aluminium alloys 
A Anodize (a chemical coating)  B Aluminium cladding  C Top coated with paint  D All are correct  Câu 11: 
The rate of galvanic corrosion depends on 
A Sizes of the parts in contact 
B Difference of electrical potential  C Presence of electrolytes  D All are correct  Câu 12: 
Microbial corrosion usually occurs in  A Hydraulic tank  B Fuel tank  C Cargo compartment  D Avionics compartment  Câu 13: 
Which type of corrosion is this?    A Galvanic corrosion  B Stress corrosion  C Pitting corrosion  D Fretting corrosion  Câu 14: 
Which type of corrosion is this?        A Galvanic corrosion  B Stress corrosion 
C Pitting corrosion (ăn mòn rỗ)  D Fretting corrosion  Câu 15:  (1) is    A Root  B Crest đỉnh  C Pitch  D Thread  Câu 16:  A right hand screw is 
A The screw will go in when turn it clockwise 
B The screw will go in when turn it counter-clockwise 
C The screw can only be turned with right hand  D All are wrong  Câu 17: 
What is the name of this screw recess?    A Slotted  B Phillips  C Torq-set  D Hex or Allen  Câu 18: 
What is the name of this bolt head?        A Hex  B Countersunk  C Double hex  D Cap  Câu 19: 
A bolt has code NAS6405U6, “NAS” means  A The family name of the bolt  B The name of manufacturer  C The standard of the bolt  D All are wrong 
Câu 20: When install a bolt, how many washers can be used to adjust the grip length?  A Maximum 2 washers  B Maximum 3 washers  C Maximum 4 washers  D Unlimited  Câu 21: 
The high-temperature self-locking nut A 
Apply where temperarture exceed 120oC  B Can be re-used 
C Are made of steel alloyD All are correct  Câu 22: 
What is the name of this washer?    A Spring washer  B Tab washer  C Lock washer  D Shakeproof washer  Câu 23:  Blind fasteners 
A Are designed for dark working environment 
B Are designed for blind mechanic 
C Are designed for use in passages that are only accessible from one side  D All are correct  Câu 24: 
In Airbus aircraft coordination, the +Y value is  A On the left wing  B On the right wing 
C Upper of cabin floor + 240mm 
D Lower of cabin floor + 240mm  Câu 25: 
The direction of zone numbering is  A Left to right      B Forward to aft  C Inboard to outboard  D All are correct  Câu 26: 
The secondary structure of the aircraft carries 
A Flight, ground and pressurization loads 
B Air or inertial loads generated on or within its structure  C Both A & B are correct  D Both A & B are wrong  Câu 27:  The fail-safe method: 
A A duplication of certain structure members to ensure that if one member fail, 
theother would assume the load of the failed member. 
B Provides the basis for most modern aeroplane designs. 
C If a structural member fail, the safe of the flight would be ensure by itself.  D B & C are correct  Câu 28: 
The drain valves on aircraft fuselage 
A Are fitted along the lowest points of the pressured fuselage 
B Are open when the aircraft cabin is unpressurised 
C Are closed when the cabin is pressurised to prevent loss of cabin pressureD All are  correct  Câu 29: 
Which aircraft structure member carries loads?  A Frames & Stringers  B Skin  C Bulkheads  D All  Câu 30:  The top coat of paint coating 
A Increase the corrosion resistance properties 
B Protect the surface against the corrosive agents 
C Gives a good surface for the adhesion of the subsequense paint coatings 
D Protect the layers of the primer  Câu 31: 
Which structural member transport the wing loads?  A Frames  B Stringers  C Skin  D Center wing box  Câu 32:  Scratch (vết trầy) is a 
A Line of damage which causes a cross sectional area change 
B Damaged area which results in a cross sectional area change producing a 
continuoussharp or smooth channel like groove in the material 
C Partial fracture or complete break in the material 
D Damaged area which is pushed in, with respect to its usual contour.  Câu 33:  Delamination 
A Is when a separation of materials occurs due to an adhesive failure     
B Is caused by the pressure and speed of the air at leading edges areas of the wings  oraircraft nose 
C Is when a separation of plies occurs in a multi-laminate material(xảy ra tách lớp  trong vl nhiều lớp) 
D Is caused by lightning strike  Câu 34: 
Which is the possible cause of a burn mark on aircraft skin  A Bird strike  B Lightning strike  C Heavy rain  D Hard landing  Câu 35: 
How to map a damage on aircraft skin? 
A Measure the x,y,z coordination of the damage 
B Measure the distance to nearest frames & stringers 
C Measure the distance to the wings 
D Measure the distance to the landing gears  Câu 36: 
The temporary repair of a structural damage 
A The damage is completely repaired 
B The damage must be repaired again with permanent repair method  C Not necessary to re-inspect  D All are wrong 
Câu 37: During assessment of a structural damage, the dimension is out of limit in the  repair manual 
A Use computer program to run the simulation for a new repair solution 
B Contact the aircraft manufacturer (Airbus, Boeing, …) 
C Just replace the whole damaged part  D All are correct 
Câu 38: In the diaphragm for allowable limit of a scratch after rework, the vertical axis  is   
A Percent of (max depth of rework)/(max length of rework) 
B Percent of (max depth of rework)/(mix depth of rework)     
C Percent of (max depth of rework)/(nominal material thickness)  D All are wrong  Câu 39:  SRM means  A Structural Repair Method  B Structural Repair Manual  C Structural Rework Manual  D Structural Rework Method  Câu 40: 
What is the purpose of this tool   
A To measure the depth with high accuracy 
B To measure the smoothness of the skin 
C To measure the depth with low accuracy  D All are correct  Câu 41: 
A burnt rivet can be replaced with  A The same size rivet  B The smaller size rivet  C The bigger size rivet  D The special rivet  Câu 42: 
Which method is correct for sealant application    A (A) is correct  B (B) is correct 
C (B) is correct but can use (A) in the small area 
D (A) is correct but can use (B) in the small area 
Câu 43: Which member of passenger door structure hold the door closed when the  cabin is pressurize?  A Door frames  B Door linings 
C Door lock hooks or lock pins  D Door stop fittings  Câu 44: 
The cockpit windows, the layers of glass are bonded by      A Glue  B Sealant  C Polyurethane 
D A thin layer of pressurized inert gas  Câu 45: 
Which statement is CORRECT about cabin windows 
A Only the outer pane carry differential pressure 
B If the outer pane is broken, the inner pane can carry full differential pressureC If 
the outer pane is broken, the inner pane can carry differential pressure within 1  hour only 
D If the outer pane is broken, aircraft cannot hold the pressure 
Câu 46: The inner pane of cabin window has 1 hole in the center bottom A This hole 
make sure the pressure between inner & outer panes is the same as the cabin pressure. 
B This hole allows condensed water can be drained. 
C This hole will make a hustle sound when the outer pane is broken  D All are correct  Câu 47: 
Which structural member carry the main loads on the wing?  A The ribs  B The spars  C The lower skin  D All are correct  Câu 48:  The ribs of wing structure 
A Are able to carry torsion, compression & shear loads  B Give the shape to the wing 
C Provide wall for the fuel tanks  D All are correct  Câu 49: 
In most commercial aircraft, the manholes of the wings are located on 
A On the upper skin panel of the wings 
B On the lower skin panel of the wings 
C On the front spar of the wings 
D On the rear spar of the wings  Câu 50:  The pylon 
A Is located under each wing of the aircraft 
B Supports the engines which are on each wing, supports and routes systems 
betweenthe engine and the wing 
C Carry all the loads from the engine to the torque box  D All are correct