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VOICE DATA VIDEO (VDV) Practice Test EXAM QUESTIONS AND
CORRECT VERIFIED SOLUTIONS LATEST UPDATE THIS YEAR –
JUST RELEASED
VOICE DATA VIDEO (VDV) Practice Test – Questions 1-250
Question 1
A _____ is a factory assembly of two or more conductors having an overall covering.
A) wire
B) cable
C) harness
D) bus
Correct Answer: B
Rationale: A cable is defined as a factory assembly of two or more conductors having an overall
covering . A wire is a single conductor, while a harness is an assembly of cables.
Question 2
The total voltage of two 12V batteries installed in parallel would be equal to _____.
A) 6V DC
B) 12V DC
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C) 24V DC
D) 48V DC
Correct Answer: B
Rationale: Batteries in parallel maintain the same voltage while increasing current capacity. Two
12V batteries in parallel would produce 12V DC .
Question 3
The primary or tip colors are _____.
A) white, red, black, yellow, and violet
B) blue, orange, green, brown, slate
C) white, blue, orange, green, brown
D) red, green, black, yellow, blue
Correct Answer: A
Rationale: The primary or tip colors in telecommunications cabling are white, red, black, yellow,
and violet . These are part of the standard color-coding scheme for 25-pair cables.
Question 4
One watt is equal to _____.
A) 1.412 BTU/hour
B) 3.412 BTU/hour
C) 5.412 BTU/hour
D) 7.412 BTU/hour
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Correct Answer: B
Rationale: One watt is equal to 3.412 BTU/hour . This conversion is important for understanding
heat dissipation in electrical and electronic systems.
Question 5
A _____ is used to measure optical power.
A) voltmeter
B) ohmmeter
C) power meter
D) megger
Correct Answer: C
Rationale: A power meter is used to measure optical power in fiber optic systems . It measures
the light output from a fiber to verify proper signal levels.
Question 6
The most common connector type used on RG-59 cable for CCTV is _____.
A) BNC
B) F-type
C) RCA
D) RJ-45
Correct Answer: A
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Rationale: BNC (compression) is the most common connector type used on RG-59 cable for
CCTV applications . BNC connectors provide a secure, twist-lock connection for video signals.
Question 7
The best way to protect against voltage spikes in a DC circuit is to _____.
A) add a resistor in series
B) add a diode across the relay coil
C) add a capacitor in parallel
D) add a fuse
Correct Answer: B
Rationale: Adding a diode across the relay coil (in reverse bias) is the best way to protect against
voltage spikes in a DC circuit . This is a common practice to suppress inductive kickback.
Question 8
A _____ could be used to prevent voltage spikes from occurring during inductive coil relay
operation.
A) resistor
B) capacitor
C) diode connected across the coil terminals in reverse bias
D) fuse
Correct Answer: C
VOICE DATA VIDEO (VDV) Practice Test EXAM QUESTIONS AND
CORRECT VERIFIED SOLUTIONS LATEST UPDATE THIS YEAR –
JUST RELEASED
VOICE DATA VIDEO (VDV) Practice Test – Questions 1-250
Question 1
A _____ is a factory assembly of two or more conductors having an overall covering.
A) wire
B) cable
C) harness
D) bus
Correct Answer: B
Rationale: A cable is defined as a factory assembly of two or more conductors having an overall
covering . A wire is a single conductor, while a harness is an assembly of cables.
Question 2
The total voltage of two 12V batteries installed in parallel would be equal to _____.
A) 6V DC
B) 12V DC
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C) 24V DC
D) 48V DC
Correct Answer: B
Rationale: Batteries in parallel maintain the same voltage while increasing current capacity. Two
12V batteries in parallel would produce 12V DC .
Question 3
The primary or tip colors are _____.
A) white, red, black, yellow, and violet
B) blue, orange, green, brown, slate
C) white, blue, orange, green, brown
D) red, green, black, yellow, blue
Correct Answer: A
Rationale: The primary or tip colors in telecommunications cabling are white, red, black, yellow,
and violet . These are part of the standard color-coding scheme for 25-pair cables.
Question 4
One watt is equal to _____.
A) 1.412 BTU/hour
B) 3.412 BTU/hour
C) 5.412 BTU/hour
D) 7.412 BTU/hour
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Correct Answer: B
Rationale: One watt is equal to 3.412 BTU/hour . This conversion is important for understanding
heat dissipation in electrical and electronic systems.
Question 5
A _____ is used to measure optical power.
A) voltmeter
B) ohmmeter
C) power meter
D) megger
Correct Answer: C
Rationale: A power meter is used to measure optical power in fiber optic systems . It measures
the light output from a fiber to verify proper signal levels.
Question 6
The most common connector type used on RG-59 cable for CCTV is _____.
A) BNC
B) F-type
C) RCA
D) RJ-45
Correct Answer: A
, Page 4 of 116
Rationale: BNC (compression) is the most common connector type used on RG-59 cable for
CCTV applications . BNC connectors provide a secure, twist-lock connection for video signals.
Question 7
The best way to protect against voltage spikes in a DC circuit is to _____.
A) add a resistor in series
B) add a diode across the relay coil
C) add a capacitor in parallel
D) add a fuse
Correct Answer: B
Rationale: Adding a diode across the relay coil (in reverse bias) is the best way to protect against
voltage spikes in a DC circuit . This is a common practice to suppress inductive kickback.
Question 8
A _____ could be used to prevent voltage spikes from occurring during inductive coil relay
operation.
A) resistor
B) capacitor
C) diode connected across the coil terminals in reverse bias
D) fuse
Correct Answer: C
