DGCA Module 07 Maintenance Practices, 3rd Session of 2018 covered aircraft and workshop safety, fittings, riveting, bearings, control cables, tools, EWIS and mixed type questions.
DGCA Module 07
1st Session of 2017
1. MTCS About Hidden lines.
A) Hidden lines are long continuous lines
B) Hidden lines are short dashes evenly spaced, and phantom lines use 1 long and 2 short dashes
C) Leader lines are always dashed lines
Answer
2. What is a datum in aircraft weight and balance calculations.
A) An imaginary vertical reference plane
B) The center of gravity
C) The aircraft nose section
Answer
3. How many principal views are used in orthographic projection.
A) 4
B) 5
C) 6
Answer
4. A symmetrical object is commonly represented by which type of view.
A) Sectional view
B) Half view
C) Auxiliary view
Answer
5. Maximum takeoff weight is equal to.
A) Empty weight + Useful load
B) Fuel weight + Oil weight
C) Payload only
Answer
6. TCAS can detect which of the following aircraft.
A) All aircraft
B) Only transponder-equipped aircraft
C) Only military aircraft
Answer
7. An assembly drawing shows.
A) A single component only
B) Electrical wiring only
C) Relationship between two or more parts
Answer
8. During aircraft towing, who must be present in the cockpit/flight station.
A) Any passenger
B) A qualified person
C) No one
Answer
9. Aircraft taxiing may be carried out by.
A) Any maintenance helper
B) Rated pilot or qualified technician
C) Cabin crew only
Answer
10. The vernier scale is located on which part of a micrometer.
A) Sleeve
B) Frame
C) Anvil
Answer
11. What is the primary use of a cape chisel.
A) Cutting grooves and keyways
B) Cutting wires
C) Measuring thickness
Answer
12. In a flexible hacksaw blade, which part is hardened.
A) Entire blade
B) Teeth only
C) Frame only
Answer
13. Static wicks on an aircraft are used to.
A) Discharge static electricity
B) Reduce fuel consumption
C) Increase lift
Answer
14. For the same current-carrying capacity, an aluminum wire should be.
A) Smaller than copper wire
B) Same size as copper wire
C) Two gauge sizes larger than copper wire
Answer
15. What is the purpose of flux in soldering.
A) Increase weight
B) Prevent oxidation and clean the surface
C) Reduce conductivity
Answer
16. Low-temperature brazing is commonly known as.
A) Arc welding
B) Spot welding
C) Silver soldering
Answer
17. Which filler metal is commonly used in silver soldering.
A) Silver alloy
B) Cast iron
C) Magnesium
Answer
18. During brazing inspection, the filler metal should be.
A) Evenly distributed throughout the joint
B) As in A+ Applied on one side only
C) Visible in lumps
Answer
19. Soft solder is generally an alloy of.
A) Copper and Zinc
B) Tin and Lead
C) Iron and Carbon
Answer
20. Radiographic inspection commonly uses.
A) Infrared rays
B) Laser beams
C) X-rays and Gamma rays
Answer
21. Fire extinguishers can normally be identified from a distance of.
A) 1 foot
B) 3 feet
C) 10 feet
Answer
22. A false (hung) start occurs when.
A) Engine starts but RPM remains abnormally low
B) Engine overspeeds
C) Engine fails to rotate
Answer
23. A check nut wrench is specifically used for.
A) Pipe fittings
B) Turning check/jam nuts
C) Cutting sheet metal
Answer
24. A lever jaw wrench is mainly used for.
A) Measuring dimensions
B) Drilling holes
C) Gripping and holding objects
Answer
25. A combination wrench has.
A) Two open ends
B) One box end and one open end
C) Two box ends
B) Two box end and Two open end
Answer
26. A pipe wrench is designed to grip.
A) Round pipes and cylindrical parts
B) Electrical wires and flat parts
C) Flat sheets
Answer
27. A strap wrench is best suited for.
A) Cutting bolts without surface damage
B) Turning cylindrical parts without surface damage
C) Removing rivets without surface damage
Answer
28. An adjustable wrench differs from a standard wrench because it has.
A) Two fixed jaws and one movable jaw
B) No jaws
C) One fixed jaw and one movable jaw
Answer
29. Inspection instructions for aircraft maintenance are commonly found in.
A) AMM, EO, Modifications, and Service Bulletins
B) Passenger manifest and manuals
C) Airport directory
Answer
30. A screwdriver tip turning blue is usually an indication of.
A) Proper lubrication
B) Excessive heat
C) Corrosion protection
Answer
31. An unsalvageable component is one that.
A) Can be repaired and reused
B) Requires cleaning
C) Non-repairable defect
Answer
32. Parcolubizing is a process used primarily for.
A) Heat treatment of aluminum
B) Chemical treatment of iron and steel parts
C) Welding magnesium alloys
Answer
33. What is brinelling.
A) A type of corrosion
B) A shallow spherical depression caused by heavy loads
C) A crack caused by fatigue
Answer
34. A circular mil is used to measure the area of.
A) Circular conductors
B) Structural panels
C) Rectangular conductors
Answer
35. Lightning damage on an aircraft may appear as.
A) Paint fading and static discharge damage
B) Strike damage and static discharge damage
C) Fuel leakage and static discharge damage
Answer
36. Dry powder fire extinguishers are most effective on.
A) Class B and C fires and especially Class D fires
B) Class A fires
C) Water-based fires
Answer
37. Methyl Bromide (CH₃Br) is identified as.
A) Halon 1211
B) Halon 1001
C) Halon 1301
Answer
38. What is the main advantage of Eddy Current Inspection.
A) Detects defects without removing surface coating
B) Measures fuel quantity
C) Checks hydraulic pressure
Answer
39. Empty Weight C.G. Range refers to.
A) Fuel tank capacity
B) Allowable variation of travel within C.G. limits
C) Maximum payload
Answer
40. A roller chain consists of.
A) Gears and shafts
B) Outer and inner plates, springs and pulleys
C) Outer and inner plates, pins, and bushes
Answer
41. A combination of gust and high airspeed may result in.
A) Structural damage
B) Fuel contamination
C) Electrical short circuit
Answer
42. Moisture in filler rods and damp flux can cause.
A) Better weld penetration
B) Porosity in the weld
C) Increased weld strength
Answer
43. Thermography is most effective for detecting defects in.
A) Fuel tanks
B) Engine bearings
C) Thin laminates and surface defects
Answer
44. Spraying CCl₄ on hot metals may.
A) Improve cooling
B) Release harmful gases
C) Prevent oxidation permanently
Answer
45. An ohmmeter is primarily used to check.
A) Air pressure
B) Fuel quantity
C) Continuity
Answer
46. Aviation snips are mainly used for cutting.
A) Heat-treated aluminum alloy and Wood
B) Heat-treated aluminum alloy and Plastic sheets
C) Heat-treated aluminum alloy and stainless steel
Answer
47. Manila rope should be inspected regularly for.
A) Mildew and rot
B) Paint damage
C) Electrical leakage
Answer
48. The vernier scale of a micrometer typically contains.
A) 5 divisions
B) 10 divisions
C) 20 divisions
Answer
49. Which aircraft control cable constructions are most commonly used.
A) 1×7 and 1×19
B) 6×6 and 6×12
C) 7×7 and 7×19
Answer
50. Resistance welding is performed using.
A) High voltage and low current
B) Low voltage and high current
C) High voltage and high current
Answer
51. Which connector is most widely used with RF cables.
A) RJ-45
B) USB
C) BNC
Answer
52. Which of the following can promote corrosion.
A) Smooth polished surfaces
B) Indentations, burrs, cracks, and dissimilar metals
C) Protective coatings and dissimilar metals
Answer
53. The product of weight and arm is known as.
A) Moment
B) Velocity
C) Pressure
Answer
54. The most effective protection against EMI/HIRF is.
A) Bonding
B) Shielding
C) Lubrication
Answer
55. Why should direct connections to magnesium structures be avoided in ground return circuits.
A) They reduce conductivity
B) They increase resistance
C) They may create a fire hazard
Answer
56. Voltage drops in the return path can lead to.
A) Voltage regulation problems
B) Better efficiency
C) Increased lift
Answer
57. What is delamination in composite structures.
A) Surface corrosion
B) Separation of plies or skin from the core
C) As in A+ Paint peeling
Answer
58. Firewall class connectors are designed to.
A) Improve signal strength
B) Prevent fire penetration
C) Reduce aircraft weight
Answer
59. Which statement correctly describes radial and axial loads.
A) Both act parallel to the shaft
B) Radial load acts parallel, axial load acts at right angles
C) Radial load acts at right angles to the shaft, axial load acts parallel
Answer
60. Gear ratio is defined as which of the following.
A) Ratio of gear diameter only
B) Teeth ratio and inverse speed ratio
C) Ratio of torque to speed
Answer
61. Roller chain consists of outer and inner plates, bearing pins, and bushes.
A) Outer and inner plates, bearing pin, and bushes
B) Only rollers
C) Gears and shafts
Answer
62. Combination of gust and airspeed may result in structural damage.
A) Structural damage
B) Fuel contamination
C) Electrical failure
Answer
63. Moisture entrapped in filler rod and damp flux causes porosity in weld.
A) Increased weld strength
B) Porosity in weld
C) Better penetration
Answer
64. Thermography is most effective for thin laminates and surface defects.
A) Thin laminates and surface defects
B) Internal fuel leaks only
C) Measuring dimensions
Answer
65. CCL4 releases harmful gases when sprayed on hot metals.
A) Produces oxygen
B) Releases harmful gases
C) Prevents corrosion completely
Answer
66. An ohm meter is used to check integrity and continuity of a bulb filament.
A) Measure airspeed
B) Check integrity and continuity
C) Measure pressure
Answer
67. Aviation snips are used for cutting heat-treated aluminum alloy and stainless steel.
A) Aviation snips
B) Screwdriver
C) Pipe wrench
Answer
68. Manila rope should be inspected periodically for mildew and rot.
A) Rust and cracks
B) Mildew and rot
C) Paint damage
Answer
69. Vernier scale of a micrometer has 10 divisions representing one ten-thousandth of an inch.
A) 5 divisions
B) 20 divisions
C) 10 divisions
Answer
70. The most common aircraft control cables are 7×7 and 7×19 constructions.
A) 1×7 and 1×19
B) 7×7 and 7×19
C) 6×6 and 6×19
Answer
71. Resistance welding is performed using low voltage and high current.
A) High voltage and low current
B) High voltage and high current
C) Low voltage and high current
Answer
72. BNC is the most widely used cable connector in RF cables.
A) USB connector
B) BNC connector
C) RJ-45 connector
Answer
73. Corrosion can be caused by indentations, burrs, cracks, and dissimilar metals.
A) Proper lubrication
B) As in A+ Clean painted surfaces
C) Indentations, burrs, cracks, and dissimilar metals
Answer
74. The product of weight and arm is called the moment.
A) Pressure
B) Torque only
C) Moment
Answer
75. The most effective protection from EMI/HIRF is shielding.
A) Bonding
B) Shielding
C) Grounding
Answer
76. Direct connections to a magnesium structure should not be used in ground return circuits because they may create a fire hazard.
A) They may create a fire hazard
B) They improve conductivity
C) They reduce voltage drop
Answer
77. Voltage drops in the return path can cause voltage regulation problems.
A) Better circuit performance
B) Voltage regulation problems
C) Increased fuel efficiency
Answer
78. Delamination is the separation of plies or de bonding of skin from the core.
A) Delamination
B) Corrosion
C) Fatigue crack
Answer
79. Firewall class connectors are designed to prevent fire penetration and continue functioning for a specified period.
A) Hermetic connectors
B) Firewall class connectors
C) Standard connectors
Answer
80. Radial load acts at a right angle to the shaft, while axial load acts parallel to the shaft.
A) Radial load is parallel to shaft
B) Axial load is at right angle to shaft
C) Radial load is at right angle to shaft and axial load is parallel to shaft
Answer
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