Mobile Electronics Quiz

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| By Thames

Thames

Community Contributor

Quizzes Created: 2572 | Total Attempts: 9,336,246

Questions: 16 | Attempts: 300 | Updated: Mar 20, 2022

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Questions and Answers

1.

If you have a 4 ohm subwoofer with a 100 watt continuous power rating, what fuse rating should you use to protect the subwoofer from overload?
- A.
  
  None Of These Choices
- B.
  
  5 Amp Fuse
- C.
  
  2.5 Amp Fuse
- D.
  
  1 Amp Fuse
Correct Answer
B. 5 Amp Fuse
2.

Which one of the following statements best describe a high pass filter?
- A.
  
  A Filter That Only Allows Frequencies Over 100 Hz To Be Passed
- B.
  
  A Filter That Only Allows Frequencies Under 10,000 Hz To Be Passed
- C.
  
  A Filter That Passes All Frequencies Above A Given Cutoff Frequency
- D.
  
  A Filter That Passes All Frequencies Below A Given Cutoff Frequency
Correct Answer
C. A Filter That Passes All Frequencies Above A Given Cutoff Frequency
3.

Which of the following is true about a standard lead acid car battery?
- A.
  
  Converts Dc From The Alternator To Ac Voltage
- B.
  
  Contains Six Cells And Has A Nominal Voltage Of 2.11 Volts Per Cell When Fully Charged
- C.
  
  Contains Eight Cells And Has A Nominal Voltage Of 12 Volts Per Cell When Fully Charged
- D.
  
  It Is The Main Source Of Electrical Power While The Vehicle Is Being Driven
Correct Answer
B. Contains Six Cells And Has A Nominal Voltage Of 2.11 Volts Per Cell When Fully Charged
4.

To avoid noise interference, how many inches would be best for audio signal wiring to be run from stock wiring or power wires?
- A.
  
  6
- B.
  
  3
- C.
  
  18
- D.
  
  12
Correct Answer
C. 18
5.

What is the most common cause of alternator whine?
- A.
  
  A Ground Loop
- B.
  
  The Alternator Is Faulty
- C.
  
  A Weak 12 Volt Car Battery
- D.
  
  Poor Quality Loudspeakers
Correct Answer
A. A Ground Loop
6.

In a conventional loudspeaker, what is the purpose of the spider?
- A.
  
  To Keep The Cone Centered Over The Pole Piece
- B.
  
  Provide The Main Restoring Force For The Speaker
- C.
  
  All Of These Choices
- D.
  
  To Keep Dust And Dirt Out Of The Voice Coil Gap
Correct Answer
C. All Of These Choices
7.

A band pass loudspeaker enclosure can be designed to increase speaker efficiency, but at the expense of what?
- A.
  
  Higher Distortion
- B.
  
  Low End Frequency Response
- C.
  
  Sound Quality
- D.
  
  Lower Power Handling
Correct Answer
B. Low End Frequency Response
8.

The maximum allowable RF output power for a mobile cellular phone is how many watts?
- A.
  
  5
- B.
  
  15
- C.
  
  7.5
- D.
  
  3
Correct Answer
D. 3
9.

A standard 12-15 ft. length of RG-58 coaxial cable will have a loss at cellular frequencies of how many dB?
- A.
  
  3
- B.
  
  0.5
- C.
  
  2
- D.
  
  1
Correct Answer
A. 3
10.

The first spatial type sensor used in automotive security systems was what kind of sensor?
- A.
  
  Infrared Field Disturbance
- B.
  
  Radio Field Disturbance
- C.
  
  Ultrasonic
- D.
  
  None Of These Choices
Correct Answer
C. Ultrasonic
11.

What does the word "isobaric" mean?
- A.
  
  Constant Pressure
- B.
  
  None Of These Choices
- C.
  
  Separate Air
- D.
  
  Double Loaded
Correct Answer
A. Constant Pressure
12.

What unit is capacitance measured in?
- A.
  
  Amps
- B.
  
  Farads
- C.
  
  Henries
- D.
  
  Cycles
Correct Answer
B. Farads
13.

What type of amplifier uses square waves to produce sound?
- A.
  
  Class B
- B.
  
  Class A
- C.
  
  Class D
- D.
  
  Class C
Correct Answer
C. Class D
14.

Full power can be achieved from high-current amplifiers by doing what?
- A.
  
  Running Amp In Mono Instead Of Stereo
- B.
  
  Increasing Ac Voltage To The Amp
- C.
  
  Lowering The Ohm Load
- D.
  
  Increasing Dc Voltage To The Amp
Correct Answer
C. Lowering The Ohm Load
15.

What is the purpose of an electronic crossover?
- A.
  
  To Make The System Sound Better
- B.
  
  To Keep The Speakers From Blowing
- C.
  
  To Send The Correct Frequencies To The Correct Speakers
- D.
  
  To Make The Bass Louder
Correct Answer
C. To Send The Correct Frequencies To The Correct Speakers
16.

Of the following, which would most likely to cause NOISE in your stereo system?
- A.
  
  Speaker Wire Gauge Is Too Small
- B.
  
  Power Wire Gauge Is Too Small
- C.
  
  Running The Ground Wire More Than 12 Inches
- D.
  
  Running The Power Wire And Rca Cables On The Same Side Of The Car
Correct Answer
D. Running The Power Wire And Rca Cables On The Same Side Of The Car

Quiz Review Timeline +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

Current Version
Mar 20, 2022

Quiz Edited by
ProProfs Editorial Team
May 15, 2015

Quiz Created by
Thames

Mobile Electronics Quiz

If you have a 4 ohm subwoofer with a 100 watt continuous power rating, what fuse rating should you use to protect the subwoofer from overload?

Which one of the following statements best describe a high pass filter?

Which of the following is true about a standard lead acid car battery?

To avoid noise interference, how many inches would be best for audio signal wiring to be run from stock wiring or power wires?

What is the most common cause of alternator whine?

In a conventional loudspeaker, what is the purpose of the spider?

A band pass loudspeaker enclosure can be designed to increase speaker efficiency, but at the expense of what?

The maximum allowable RF output power for a mobile cellular phone is how many watts?

A standard 12-15 ft. length of RG-58 coaxial cable will have a loss at cellular frequencies of how many dB?

The first spatial type sensor used in automotive security systems was what kind of sensor?

What does the word "isobaric" mean?

What unit is capacitance measured in?

What type of amplifier uses square waves to produce sound?

Full power can be achieved from high-current amplifiers by doing what?

What is the purpose of an electronic crossover?

Of the following, which would most likely to cause NOISE in your stereo system?