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Sample SHGM Part-66 B3 Practice Questions
Try these sample questions to review concepts for the SHGM Part-66 B3 exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 30+ question experience with AI tutoring.
1A maintenance calculation uses 1,600 kg present mass and a 2,000 kg structural limit. What is the remaining mass margin, before any balance or performance checks?
A.200 kg
B.400 kg
C.800 kg
D.3,600 kg
Explanation: Subtract present mass from the limit: 2,000 − 1,600 = 400 kg. This arithmetic margin alone does not authorize an operational loading.
2A perpendicular 50 N force acts on a 0.40 m lever arm. What torque results?
A.12.5 N m
B.20 N m
C.50.4 N m
D.125 N m
Explanation: Torque equals perpendicular force multiplied by lever arm. The result is 50 × 0.40 = 20 N m.
3An ideal reduction gear has an input speed of 2,000 rpm and a 4:1 speed reduction. What is output speed?
A.250 rpm
B.500 rpm
C.2,000 rpm
D.8,000 rpm
Explanation: A 4:1 reduction means output speed is one quarter of input speed. Thus 2,000/4 = 500 rpm.
4A bar carries 10,000 N tension over a 50 mm² cross-section. Using stress = force/area and 1 N/mm² = 1 MPa, what is nominal tensile stress?
A.20 MPa
B.50 MPa
C.200 MPa
D.500 MPa
Explanation: Nominal stress is 10,000/50 = 200 N/mm². This equals 200 MPa and does not include local stress concentrations.
5A 12 V DC lamp takes 5 A. What electrical power does it consume?
A.2.4 W
B.17 W
C.60 W
D.120 W
Explanation: DC power is voltage multiplied by current. Therefore 12 × 5 = 60 W.
6For the same conductor material, cross-section and temperature, what happens to resistance if wire length doubles?
A.It halves
B.It doubles
C.It stays unchanged
D.It becomes four times greater
Explanation: Conductor resistance is proportional to length when material and area are unchanged. Twice the length therefore gives twice the resistance.
7What is the normal basic behavior of a rectifier diode within its rated operating limits?
A.It conducts much more readily in the forward direction than in reverse
B.It stores charge as its principal function, like a capacitor
C.It provides equal low resistance in both directions
D.It converts DC to AC without any switching circuit
Explanation: A rectifier diode has strongly direction-dependent conduction. Reverse breakdown and device ratings must still be respected.
8A two-input AND gate receives one HIGH and one LOW input. What is its output?
A.HIGH
B.LOW
C.Alternating automatically
D.Independent of both inputs
Explanation: An AND gate requires both inputs HIGH for a HIGH output. With either input LOW, the output is LOW.
9Why is magnetic-particle inspection not a general method for inspecting an aluminium alloy component?
A.The method requires a suitable ferromagnetic material
B.Aluminium has no possible defects
C.Every metal responds identically to magnetization
D.The method only measures paint thickness
Explanation: Magnetic-particle inspection relies on magnetic flux and leakage fields in suitable ferromagnetic parts. Aluminium normally requires a different approved inspection method.
10Corrosion pitting is found on a structural fitting. What establishes whether it is acceptable?
A.The technician's estimate that it looks shallow
B.The applicable inspection, damage limits and repair data
C.The fitting's external colour alone
D.A rule that every pit is harmless below 2,000 kg aircraft mass
Explanation: Damage significance depends on component, location and approved limits. Aircraft size and appearance alone do not establish structural acceptability.
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