APPRENTICESHIP -2025 Selection Examination
Trade: Electrician-1 DT:04.03.2025 Exam Center: Govt ITI
Rajahmundry
Candidate Name: Apprenticeship Reg.No :
Exam Duration: 60 mints.
Note: attempt all Questions, each Question carry Equal Marks(1).
Choose the right option
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1] Which of the following is a key
principle of Kirchhoff’s Current Law? 7] What should be done when
[ ] measuring the efficiency of a
A) The sum of B The sum of transformer? [ ]
currents at a ) voltages in a A) Measure the B Check the
junction is zero closed loop is input and output ) insulation
zero power resistance
C) The sum of D The power C) Measure the D Measure the
resistances in a ) dissipated in winding ) load current
series circuit is a circuit is resistance only
constant constant
8] In a poly-phase circuit, what does
2] When conducting a fault detection the term "balanced load" refer to? [
on a residential building’s wiring ]
system, what is the first step? [ A) Equal voltage B Equal current
] across all phases ) in all phases
A) Check continuity B Ensure the C) Equal power D Equal
of the neutral ) load is distribution ) frequency in
wire balanced across all phases all phases
C) Verify earth D Inspect the
leakage ) distribution
protection fuse box 9] What is the first step when
replacing transformer oil? [ ]
A) Measure the B Shut off the
3] What is the application of Ohm's load current ) main power
law in electrical circuits? [ ] supply
A) To determine the B To calculate C) Remove the core D Check the
resistance based ) the total and winding ) insulation
on power current in a resistance
series circuit
C) To relate D To determine 10] What is the primary role of an MCB
voltage, current, ) the efficiency (Miniature Circuit Breaker) in
and resistance of electrical residential buildings? [ ]
machines
A) To monitor the B To protect
voltage ) circuits from
4] In a three-phase system with overload
unbalanced loads, which type of C) To prevent D To regulate
current is typically monitored for fault earthing issues ) power factor
detection? [ ]
A) Phase current B Line current 11] In single-phase transformers,
) which of the following is true for
C) Neutral current D Ground operation in series? [ ]
) current
A) The voltage is B The current is
divided equally ) divided
5] Which law is primarily used to between the equally
calculate the total resistance in a transformers between the
parallel circuit? [ ] transformers
A) Kirchhoff's B Ohm’s Law C) The efficiency D The
Voltage Law ) increases as ) transformers
C) Joule’s Law D Parallel more have to be of
) Resistance transformers are the same
Law added rating
6] What is the primary reason for 12] What is the purpose of skilling
using pipe and plate earthing in practice on various measuring
electrical systems? [ ] instruments in electrical circuits? [
A) To minimize B To enhance ]
electrical losses ) electrical A) To determine B To calibrate
insulation the type of ) the
C) To protect D To improve current in the transformers
against electric ) the stability system
shock of the system C) To measure D To determine
electrical ) the electrical 20] In a DC machine, what component
parameters such load of the is responsible for converting
as current, system mechanical energy to electrical
voltage, and energy? [ ]
resistance A) Commutator B Rotor
)
13] In which situation is a distribution C) Stator D Armature
fuse box used? [ ] )
A) During load B When
balancing ) measuring 21] What is the function of the
current armature in a DC motor? [ ]
C) For overcurrent D For voltage A) To convert B To generate
protection ) regulation electrical energy ) the magnetic
to mechanical field
14] How does a sodium vapour lamp energy
differ from a mercury vapour lamp in C) To control the D To regulate
electrical installations? [ ] voltage ) the speed of
A) Sodium vapour B Mercury the motor
lamps require ) vapour lamps
more power to produce a 22] How can the performance of a DC
operate brighter light motor be improved? [ ]
C) Sodium vapour D Sodium A) By increasing B By decreasing
lamps have a ) vapour lamps the field ) the armature
higher efficacy are more resistance resistance
costly C) By increasing D By using
the voltage ) higher-rated
15] What is the effect of a high-value brushes
resistance in a series circuit according
to Ohm's law? [ ] 23] In which scenario would a
A) Increased B Increased synchronous alternator be used
current ) voltage drop instead of a DC generator?[ ]
C) Decreased D Decreased A) For lower voltage B To provide
current ) voltage drop applications ) variable
speed
16] What does a typical bridge operation
rectifier do in an electrical circuit? [ C) For large-scale D For small
] power ) mobile power
A) Converts AC to B Increases AC generation systems
DC ) voltage
C) Converts DC to D Increases DC 24] In an electrical installation, why is
AC ) voltage it necessary to install a fuse or MCB
near the power supply? [ ]
17] When performing earthing for an A) For regulating B For current
electrical system, why is the voltage ) protection
resistance to earth required to be low? C) For current D For voltage
[ ] measurement ) regulation
A) To prevent B To allow safe
electrical ) dissipation of 25] When testing an induction motor,
overload fault currents what is a common method to check
C) To increase the D To minimize the performance?[ ]
power factor ) voltage drop A) Measure the B Measure the
speed and ) temperature
18] Which device is used to protect a compare it to the of the stator
circuit from overload in an industrial rated speed
setting? [ ] C) Measure the D Measure the
A) Fuse B MCB torque using a ) voltage
) dynamometer across the
C) Earth leakage D Circuit stator
circuit breaker ) breaker windings
19] What is the primary function of a 26] Which type of winding is most
distribution transformer in a commonly used for induction motors?
residential setup? [ ] [ ]
A) To step down B To store A) Lap winding B Wave winding
voltage to usable ) electrical )
levels energy C) Closed winding D Open winding
C) To prevent D To generate )
electrical faults ) electrical
power 27] What is the effect of reducing the
load on a transformer during
operation? [ ]
A) Decreased B Increased
efficiency ) power factor
C) Increased D Decreased
voltage ) voltage
regulation regulation
28] Which of the following is a
common fault in the operation of a
transformer? [ ]
A) Overheating B Low voltage
) regulation
C) Increased load D Reduced
capacity ) noise output
29] What is the effect of using a high-
speed switch in a rectifier circuit? [
]
A) Improved B Reduced
current ) efficiency
regulation
C) Faster response D Increased
time ) power loss
30] What type of energy is typically
stored in batteries used for UPS
systems? [ ]
A) Mechanical B Chemical
energy ) energy
C) Kinetic energy D Solar energy
)
