Canadian Basic Qualification pool, section B-003-008

Subelement B-003

B-003

Section B-003-008

B-003-008-001

If a linear power supply provides overvoltage protection, where is the voltage monitored?

A.
At the input of the rectifier
B.
At the output of the filter
Correct Answer
C.
At the output of the regulator
D.
At the input of the transformer

B-003-008-001

Overvoltage protection is meant to protect your equipment from a failure of the regulator.

Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.

Tags: none

B-003-008-002

What is the purpose of the transformer in a linear power supply?

A.
Ensure that the voltage stays constant when a heavy demand is placed on the supply
B.
Smooth out the pulsating direct current
Correct Answer
C.
Convert the AC mains voltage up or down as required and provide isolation
D.
Convert alternating current into direct current

B-003-008-002

In a linear power supply, a transformer first lowers or raises the AC voltage (to bring it closer to the desired output voltage). Separate primary and secondary windings on the transformer isolate your equipment from household current for safety. A rectifier made from diodes converts AC to pulsating DC. A filter reduces the remaining ripple. A regulator finally sets the output voltage.

Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.

Tags: none

B-003-008-003

What is the purpose of the rectifier in a linear power supply?

A.
Convert the AC mains voltage up or down as required and provide isolation
B.
Ensure that the voltage stays constant when a heavy demand is placed on the supply
C.
Smooth out pulsating direct current
Correct Answer
D.
Convert alternating current into direct current

B-003-008-003

Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.

Tags: none

B-003-008-004

What is the purpose of the filter in a linear power supply?

A.
Absorb the power produced by the supply
B.
Convert alternating current into direct current
C.
Ensure that the voltage stays constant when a heavy demand is placed on the supply
Correct Answer
D.
Smooth out pulsating direct current

B-003-008-004

Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.

Tags: none

B-003-008-005

What is the purpose of the regulator in a linear power supply?

A.
Convert alternating current into direct current
B.
Absorb the power produced by the supply
Correct Answer
C.
Ensure that the voltage stays constant when the demand on the supply varies
D.
Convert the AC mains voltage up or down as required and provides isolation

B-003-008-005

Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.

Tags: none

B-003-008-006

In a linear power supply, which stage typically requires a heat sink?

A.
Filter
B.
Rectifier
Correct Answer
C.
Voltage regulator
D.
Transformer

B-003-008-006

In a linear power supply, the difference in voltage from the output of the filter and the output of the power supply is dissipated as heat.

Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.

Tags: none

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