Caco Knowledge Test
- 1.
which of the follow are all parts of a subwoofer?
- A.
Coil, wiring, capacitor, steel, surround
- B.
Big plain, little plate, coil, glue, spider
- C.
Cone, coil, pole, back plate, tinsel lead
- D.
Cone, coil, spider, port, back plate, top plate
Correct Answer
C. Cone, coil, pole, back plate, tinsel lead -
- 2.
which is more important for a voice coil fitment in a motor
- A.
Tighter to the top plates gap
- B.
Tighter to the pole
Correct Answer
B. Tighter to the pole -
- 3.
what is BL curve
- A.
Saturation in the gap
- B.
Inductance of the coil
- C.
Motor force B x L
- D.
BL of a woofer over an excursion range
Correct Answer
D. BL of a woofer over an excursion range -
- 4.
there are ________ cubic inches in a cubic foot
Correct Answer
1728 - 5.
which of the follow are functions of a pole vent
- A.
Circulate air to cool the coil
- B.
Increase motor BL
- C.
Let the smell come out if the coil gets hot
- D.
Relieve pressure under the dust cap
Correct Answer(s)
A. Circulate air to cool the coil
D. Relieve pressure under the dust cap -
- 6.
which voice coil has a tighter pack of wire windings
- A.
4'' 4 layer flat wire aluminum
- B.
3" 4 layer round wire copper
Correct Answer
A. 4'' 4 layer flat wire aluminum -
- 7.
adding an aluminum faraday ring to the pole piece can (2 answers)
- A.
Decrease effective voice coil inductance
- B.
Help remove heat from the former
- C.
Lower the impedance of the coil
- D.
Lower thermal handling of the coil
Correct Answer(s)
A. Decrease effective voice coil inductance
B. Help remove heat from the former -
- 8.
voice coils have a "slit" in the former only to adjust the diameter when winding the coil
- A.
True
- B.
False
Correct Answer
B. False -
- 9.
different cone materials experience different resonant frequencies
- A.
True
- B.
False
Correct Answer
A. True -
- 10.
the cone area of a 4 12" subs is 48"
- A.
True
- B.
False
Correct Answer
B. False -
- 11.
if a voice coil is centered in a subwoofer gap (middle of coil in the middle of the top plate) what is it considered
- A.
Underhung
- B.
Overhung
Correct Answer
B. Overhung -
- 12.
making an existing port in a vented enclosure longer will raise the tuning
- A.
True
- B.
False
Correct Answer
B. False -
- 13.
bigger enclosures allow subwoofers to better handle power mechanically
- A.
True
- B.
False
Correct Answer
B. False -
- 14.
what options are there to wire two dual 2 ohm subwoofers
- A.
2 ohm
- B.
.5 ohm
- C.
4 ohm
- D.
8 ohm
Correct Answer(s)
A. 2 ohm
B. .5 ohm
D. 8 ohm -
- 15.
a 4" 4 layer copper coil will weigh the same as a 4" 4 layer aluminum coil
- A.
True
- B.
False
Correct Answer
B. False -
- 16.
which of the following occur when a power wire is shortened from 20 feet down to 10 feet
- A.
The wire gets warmer when used
- B.
Voltage drop lessens
- C.
Current capacity increases
- D.
Current capacity remains the same as the previous length
Correct Answer(s)
B. Voltage drop lessens
C. Current capacity increases -
- 17.
the current coming from an amplifier is direct current
- A.
False
- B.
True
Correct Answer
A. False -
- 18.
where is a subwoofers air gap located on the motor
- A.
Inside the pole vent
- B.
From back plate to top plate
- C.
On top of the top plate
- D.
Between the top plate and pole piece
Correct Answer
D. Between the top plate and pole piece -
- 19.
an alternator turns mechanical energy into AC which is then turned into DC
- A.
False
- B.
True
Correct Answer
B. True -
- 20.
what does an ammeter measure
- A.
Voltage over distance
- B.
Current sag
- C.
Amperage
- D.
Power usage
Correct Answer
C. Amperage -
- 21.
what does an attenuator do
- A.
Pick up radio signal
- B.
Turn on the remote wire signal
- C.
Decrease or increase the strength of a signal
- D.
Nothing at all
Correct Answer
C. Decrease or increase the strength of a signal -
- 22.
magnetic flux in the gap, measured in Tesla-meters, is represented by "B"
- A.
True
- B.
False
Correct Answer
A. True -
- 23.
if a subwoofer enclosure has a "double baffle" it means which of the following
- A.
The port is reinforced
- B.
The box is double the thickness all round
- C.
The enclosure has bracing
- D.
The side that holds the subwoofer is double the nominal thickness of the rest of the box
Correct Answer
D. The side that holds the subwoofer is double the nominal thickness of the rest of the box -
- 24.
which of the follow is a 4th order
- A.
Ported chamber inside of a larger ported chamber
- B.
A ported chamber sealed in a sealed box
- C.
Sealed chamber inside of a ported chamber
- D.
One sealed chamber
Correct Answer
C. Sealed chamber inside of a ported chamber -
- 25.
two 12v batteries wired in series will equal 16v
- A.
True
- B.
False
Correct Answer
B. False -
- 26.
two 100ah batteries wired parallel will equal ________ah
Correct Answer
200 - 27.
an alternator can recharge a heavily depleted battery
- A.
False
- B.
True
Correct Answer
A. False -
- 28.
a bipolar speaker
- A.
Freaks out at random
- B.
Radiates signals from the front and the back of the enclosure
- C.
Only works in a sealed box
- D.
Is only meant for spl applications
Correct Answer
B. Radiates signals from the front and the back of the enclosure -
- 29.
where would dielectric grease be primarily used on a FET in an amp
- A.
To remove old adhesive
- B.
Between components and the heat sink
- C.
In the subwoofer gap to keep the coil smooth
- D.
To help solder adhere to tinsel leads
Correct Answer
B. Between components and the heat sink -
- 30.
what is a voice coil wire wrapped on
- A.
Former
- B.
A tube
- C.
The coil
- D.
Center pole
Correct Answer
A. Former -
- 31.
what is the purpose of an amplifier gain
- A.
Control amplifier output
- B.
Increase rms power
- C.
Match the source units output voltage
- D.
Adjust efficiency
Correct Answer
C. Match the source units output voltage -
- 32.
an amplifiers body is also a heat sink
- A.
False
- B.
True
Correct Answer
B. True -
- 33.
high level inputs on an amp are for
- A.
Hooking source unit speaker wires to the amp
- B.
Bypassing rca's inputs
- C.
Output signal
- D.
Making ice cream colder
Correct Answer
A. Hooking source unit speaker wires to the amp -
- 34.
impedance is measured in ohm
- A.
True
- B.
False
Correct Answer
A. True -
- 35.
diodes inside an alternator do which of the following
- A.
Converts ac to dc current
- B.
Converts low amperage dc to high amperage dc
- C.
Converts ac high amperage to low voltage high amperage dc
- D.
Steps up dc voltage and amperage to high output standards
Correct Answer
A. Converts ac to dc current -
- 36.
a subwoofer port is 5" tall and 10" wide, how many square inches of port is there
Correct Answer
50
50 square inches
50 sq inch - 37.
the SD of a woofer is the effective piston area
- A.
False
- B.
True
Correct Answer
B. True -
- 38.
its ok to mix sealed and vented batteries as long as there resting at the same voltage
- A.
True
- B.
False
Correct Answer
B. False -
- 39.
a subwoofer is not a transducer
- A.
True
- B.
False
Correct Answer
B. False -
- 40.
will a 200 foot wire experience voltage drop if theres no current passing through it
- A.
Yes
- B.
No
Correct Answer
B. No -
- 41.
which of the following are multiplied to get wattage
- A.
Ohms x voltage
- B.
Voltage x amperage
- C.
Current x ohms
- D.
Blue x green
Correct Answer
B. Voltage x amperage -
- 42.
if a 2 channel amp is bridged with a 4 ohm speaker, what ohm load is each channel seeing
- A.
4
- B.
2
Correct Answer
B. 2 -
- 43.
which contains more copper per foot
- A.
OFC 1/0
- B.
CCA 1/0
- C.
Both equal
Correct Answer
A. OFC 1/0 -
- 44.
Two 200ah batteries wired in series will have an AH of________
Correct Answer
200
200ah
200 ah - 45.
which of the following does a smaller alternator pulley do
- A.
Increase output at lower rpm's
- B.
Increase output voltage and current at lower rpm
Correct Answer
A. Increase output at lower rpm's -
- 46.
when a subwoofer motors top plate is fully saturated, adding more magnets will help
- A.
False
- B.
True
Correct Answer
A. False -
- 47.
Cara, Nick, and Tammy had 96 cookies (8 dozen) to sell at a bake sale.
- Tammy sold 32 cookies.
- Nick sold as many cookies as Tammy sold plus 5 more.
-
Cara sold 10 fewer cookies than Tammy sold.
Correct Answer
5Explanation
FYI, this is a 2nd grade math questionRate this question:
- 48.
which of the following is the function of a crossover
- A.
Canceling distortion
- B.
Filtering specific frequencies
- C.
Optimizing a drivers preferred band width
- D.
Preventing impedance rise
Correct Answer(s)
B. Filtering specific frequencies
C. Optimizing a drivers preferred band width -
- 49.
how many DB is a 2nd order slope
- A.
6DB
- B.
18DB
- C.
12DB
- D.
24DB
Correct Answer
C. 12DB -
- 50.
which of the following are all fuse types
- A.
Resistive blow
- B.
Fast blow
- C.
Slow blow
- D.
Time delay
Correct Answer(s)
B. Fast blow
C. Slow blow
D. Time delay -
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 26, 2014Quiz Edited by
ProProfs Editorial Team -
Mar 23, 2014Quiz Created by
Cacoaccount
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