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ATT TEST 2026 100% PASS ASSURED
EXAMINATION SOLUTIONS
What are 5 parts of a power supply? - correct
answer- Input, rectifier, filter, regulator,
protection
Which two parts of a power supply are
optional? - correct answer- Regulator and
protection
What is the purpose of a power supply? -
correct answer- To convert AC power into
smooth DC power
What does the input of a power supply do? -
correct answer- Step up or down the AC input
voltage
What does the rectifier do in a power supply?
- correct answer- Changes AC into pulsating DC
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What does the filter do in a power supply? -
correct answer- Changes pulsating DC into
smooth DC
How type of components do filters use? -
correct answer- Reactive components
What does a regulator do in a power supply? -
correct answer- maintains the output voltage
at a constant level despite changes in load
current
What does the protection circuit do in power
supply? - correct answer- Prevents damage to
power supply if load becomes faulty, limits or
disables output
The half wave rectifier is the same as what
circuit? - correct answer- Series limiter
Which rectifier is the least efficient using
only half the input? - correct answer- Half-
wave
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Which two rectifiers require two input signals
180 degrees out of phase? - correct answer-
Full-wave and bridge
Which rectifier uses a center tapped
transformer? - correct answer- Full wave
How is frequency determined for half wave
rectifier? - correct answer- Output frequency
is same as input frequency
How is frequency determined for full wave
rectifier? - correct answer- Output is twice
the input frequency
How is frequency determined for bridge
rectifier? - correct answer- Output is twice
the input frequency
ATT TEST 2026 100% PASS ASSURED
EXAMINATION SOLUTIONS
What are 5 parts of a power supply? - correct
answer- Input, rectifier, filter, regulator,
protection
Which two parts of a power supply are
optional? - correct answer- Regulator and
protection
What is the purpose of a power supply? -
correct answer- To convert AC power into
smooth DC power
What does the input of a power supply do? -
correct answer- Step up or down the AC input
voltage
What does the rectifier do in a power supply?
- correct answer- Changes AC into pulsating DC
,2 | Page
What does the filter do in a power supply? -
correct answer- Changes pulsating DC into
smooth DC
How type of components do filters use? -
correct answer- Reactive components
What does a regulator do in a power supply? -
correct answer- maintains the output voltage
at a constant level despite changes in load
current
What does the protection circuit do in power
supply? - correct answer- Prevents damage to
power supply if load becomes faulty, limits or
disables output
The half wave rectifier is the same as what
circuit? - correct answer- Series limiter
Which rectifier is the least efficient using
only half the input? - correct answer- Half-
wave
, 3 | Page
Which two rectifiers require two input signals
180 degrees out of phase? - correct answer-
Full-wave and bridge
Which rectifier uses a center tapped
transformer? - correct answer- Full wave
How is frequency determined for half wave
rectifier? - correct answer- Output frequency
is same as input frequency
How is frequency determined for full wave
rectifier? - correct answer- Output is twice
the input frequency
How is frequency determined for bridge
rectifier? - correct answer- Output is twice
the input frequency
