Canadian Basic Qualification pool, section B-005-003

Subelement B-005

B-005

Section B-005-003

B-005-003-001

What term describes the rate at which electrical energy is used?

A.
Resistance
B.
Voltage
C.
Current
Correct Answer
D.
Power

B-005-003-001

The watt is the unit used to measure the rate of energy use.

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

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B-005-003-002

If you have light bulbs marked 40 watts, 50 watts, 60 watts and 100 watts, which one will consume electrical energy at the highest rate?

A.
The 40-watt bulb
B.
The 60-watt bulb
Correct Answer
C.
The 100-watt bulb
D.
The 50-watt bulb

B-005-003-002

How fast does each one make the electrical utility meter on the side of your house spin ? The device with the highest wattage spins it the fastest.

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

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B-005-003-003

What is the basic unit of electrical power?

Correct Answer
A.
The watt
B.
The ohm
C.
The ampere
D.
The volt

B-005-003-003

Power, expressed in watts = voltage, in volts, TIMES current, in amperes. P = E * I. Watts = volts * amperes. The watt describes how fast electrical energy is used.

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

Tags: none

B-005-003-004

A circuit consists of a battery and load resistor. What circuit malfunction would cause no current to be drawn from the battery?

A.
A reactive circuit
B.
A short circuit
Correct Answer
C.
An open circuit
D.
A closed circuit

B-005-003-004

'Open' circuit = no current ( a loop from one side of the voltage source to the other side does NOT exist, the loop is open ). 'Closed' circuit = current ( a path exists from one side of the voltage source to the other side, current flows, the loop is closed ). 'Short-circuit' = heavy current ( a very low resistance path exists between from one side of the voltage source to the other side, large current ensues ).

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

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B-005-003-005

Which electrical circuit draws too much current?

Correct Answer
A.
A short circuit
B.
An open circuit
C.
A dead circuit
D.
A closed circuit

B-005-003-005

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

Tags: none

B-005-003-006

Power is expressed in:

A.
ohms
Correct Answer
B.
watts
C.
volts
D.
amperes

B-005-003-006

Power, expressed in watts = voltage, in volts, TIMES current, in amperes. P = E * I. Watts = volts * amperes. The watt describes how fast electrical energy is used.

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

Tags: none

B-005-003-007

Which of the following two quantities should be multiplied together to find power?

Correct Answer
A.
Voltage and current
B.
Voltage and inductance
C.
Inductance and capacitance
D.
Resistance and capacitance

B-005-003-007

Power, expressed in watts = voltage, in volts, TIMES current, in amperes. P = E * I. Watts = volts * amperes. The watt describes how fast electrical energy is used.

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

Tags: none

B-005-003-008

Which two electrical units multiplied together give the unit "watts"?

A.
Volts and farads
B.
Amperes and henries
C.
Farads and henries
Correct Answer
D.
Volts and amperes

B-005-003-008

Power, expressed in watts = voltage, in volts, TIMES current, in amperes. P = E * I. Watts = volts * amperes. The watt describes how fast electrical energy is used.

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

Tags: none

B-005-003-009

A resistor in a circuit becomes very hot and starts to burn. This is because the resistor is dissipating too much:

A.
resistance
Correct Answer
B.
power
C.
current
D.
voltage

B-005-003-009

Power is voltage times current, P = E * I. When current flows through a resistor, a 'voltage drop' ensues. Volts times amperes become watts. Power 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

B-005-003-010

When speaking of electrical circuits, what does the term "continuity" mean?

A.
The circuit is supplied with backup power
B.
The circuit is designed for direct current (DC)
C.
The circuit is rated for continuous operation
Correct Answer
D.
The circuit is a closed circuit

B-005-003-010

When an electrical circuit exhibits CONTINUITY, it implies a complete loop is formed through which current can flow. The loop forms a closed circuit.

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

Tags: none

B-005-003-011

You have acquired a transceiver and connected it to a power supply. When you switch on the power supply, its fuse blows immediately. What circuit malfunction caused the fuse to blow?

Correct Answer
A.
A short circuit
B.
An open circuit
C.
A resonant circuit
D.
A closed circuit

B-005-003-011

A fuse is a protection against excessive current. A short-circuit is a likely cause.

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

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