Module 3 March Session 2026 | DGCA Module Exam

1. Number of electrons in M shell: 18
2. MTCS:
   1. Electron mass is negligible
   2. Proton and neutron make the weight of the atom
   3. Electron has a definite mass
   4. Proton has no mass
3. Power factor
   A) True power and apparent power
   B)
   C)
   D)
4. The speed with which the effect of EMF is experienced at all parts of the conductor resulting in a flow of electrons is called:
   A) Electrical field
   B) Magnetic field
   C) Electricity
   D)
5. A fully charged capacitor behaves like:
   A) Open circuit
   B) Closed circuit
   C)
   D)
6. Star connection is also called:
   A) Delta
   B) Wye
   C) Both
   D)
7. Inductive reactance equals capacitive reactance at:
   A) Resonant frequency
   B) 20 Hz
   C) 5 Hz
   D)
8. Device that converts electrical energy to mechanical energy:
   A) DC motor
   B) DC converter
   C)
   D)
9. Good insulator:
   A) Gases
   B)
   C) Metal
   D)
10. Parallel resistance formula:
    A) Rt = R1 × R2 / (R1 + R2)
    B)
    C)
    D)
11. Capacitor voltage increases:
    A) Exponentially
    B) Linearly
    C) Immediately
    D)
12. 1 Joule in ____ second and ____ watt:
    A) 1, 1
    B) 2, 2
    C) 1, 2
    D) 2, 1
13. Autotransformer:
    A) K nearly equal to 1
    B)
    C)
    D)
14. Weakly magnetized in the same direction:
    A) Paramagnetic
    B) Ferromagnetic
    C) Diamagnetic
    D)
15. Increasing order of magnetic permeability:
    A) Dia < Para < Ferro
    B)
    C)
    D)
16. Induction motor torque is ____ compared to shunt motor:
    A) Superior
    B)Inferior
    C) =
    D)
17. Back EMF of a DC motor:
    A) Often exceeds supply voltage
    B) Aids the applied voltage
    C) Helps in energy conservation
    D)
18. In parallel capacitors ____ is same across and ____ can be different:
    A) P.D. and charge
    B) Charge and P.D.
    C) Charge and charge
    D)
19. In a parallel DC circuit, the P.D. across all branches is:
    A) Higher
    B) Lower
    C) Equal
    D)
20. The battery in which the reaction is reversible is:
    A) Primary
    B) Secondary
    C) Both
    D)
21. Resistance = 51 × 10⁻⁸, A = 10³ m, L = 10⁵ cm. Find resistivity:
    A) 51 × 10⁻⁸ ohm-meter
    B)
    C)
    D)
22. EMF is induced when a conductor:
    A) Is kept parallel to the magnetic field
    B) Is kept perpendicular to the magnetic field
    C) Cuts the magnetic field
    D)
23. EMF is induced when:
    A) Conductor moving
    B) Magnet moving
    C)
    D) NOTA
24. Inductive and capacitive reactance exist in:
    A) AC, not DC
    B) DC, not AC
    C) Both
    D)
25. Good material for shielding has ____ permeability:
    A) High
    B) Low
    C) Medium
    D)
26. SLA battery is designed to alert technicians about:
    A) Voltage getting up
    B) Battery failing
    C) Working normally
    D)
27. Numerical: Power = 120 W, Voltage = 120 V. Find current:
    A) 1 A
    B) 0.1 A
    C) 0.01 A
    D) 10 A
28. Find power when I = 2 A and R = 100 Ω:
    A) 20 W
    B) 200 W
    C) 400 W
    D)
29. Current generated with pressure source:
    A) Piezoelectric effect
    B) Thermocouple effect
    C)
    D)
30. Property related to magnetism:
    A) Relative permeability
    B) Absolute permeability
    C) Both A and B
    D) Permittivity
31. In Wheatstone bridge, the known resistors are:
    A) Equal
    B) Same
    C) Variable
    D) Precise
32. The ratio Eb/V tells the:
    A) Efficiency
    B) Speed of rotation
    C) Starting torque
    D) Running torque
33. When transformer steps up voltage, it:
    A) Steps down current with same ratio
    B) Current doesn’t change
    C) Steps up current
    D)
34. In alternator, salient poles are used in:
    A) High-speed alternator
    B) Low and medium speed alternator
    C) Both
    D)
35. Which is used for correction of power factor:
    A) Synchronous motor
    B) Non-synchronous motor
    C) Both can be used
    D)
36. Two inductors in parallel: 4 H and 6 H. Mutual inductance = 3 H. If mutual inductance opposes self inductance, calculate the combination:
    A) 1.94
    B) 0.94
    C) 2.94
37. Time = 2 min and current = 6 A. Find charge:
    A) 12
    B) 720
    C) 20
    D)
38. Transformer efficiency is maximum when:
    A) Copper loss = Iron loss
    B) Copper loss < Iron loss
    C) Copper loss > Iron loss
    D)
39. Power factor of sine wave is:
    A) 1.14
    B) 1.0
    C) 1.11
    D)
40. Frequency = 50 Hz. Find angular frequency:
    A) 50
    B) 50/1
    C) 100
    D) 50/2
41. Thermistor is a:
    A) NTC
    B) PTC
    C)
    D)
42. Capacitor is:
    A) Two conducting plates separated by an insulator
    B) Two insulators separated by conductor
    C) Two insulators separated by dielectric
    D)
43. Formula for resistance:
    A) R directly proportional to length and inversely proportional to area
    B)
    C)
    D)
44. Resistance depends upon:
    A) Area, length, temperature, material
    B)
    C)
    D)
45. Coulomb’s law is directly proportional to product of charges and inversely proportional to distance between them:
    A) True False
    B) False True
    C) False False
    D) True True
46. If L increases, resonant frequency:
    A) Increases
    B) Decreases
    C) No change
    D)
47. Formula of power:
    A) P = V² / R
    B)
    C)
    D)
48. Frequency selective device:
    A) Inductor and capacitor
    B) Resistor and capacitor
    C)
    D)
49. PMG generator:
    A) Self excited, field winding at stator
    B)
    C)

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NOTE- THESE QUESTIONS ARE WRITTEN BASED ON MEMORY SO REFER BOOKS FOR ANSWERS.

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