Exam
Name___________________________________
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Figure 2–2
1)
In Figure 2–2, if you place a voltmeter’s red lead on point E and its black lead on point H, you will
be measuring ________.
1)
A)
VR5
B)
VR6
C)
VR7
D)
VR4
2)
If a resistor is color coded with orange, orange, orange and silver bands, the resistance equals
________, the lower tolerance limit equals ________ and the upper tolerance limit equals ________.
2)
A)
33 k, 32,670 , 33,330
B)
33 k, 29,700 , 36,300
C)
33 k, 26,400 , 39,600
D)
33 k, 31,350 , 34,650
Figure 2–1
3)
Which switch in Figure 2–1 could be used to simultaneously open or simultaneously close two
circuits?
3)
A)
graph (a)
B)
graph (b)
C)
graph (c)
D)
graph (d)
E)
graph (e)
4)
The voltage measured directly across an open switch in a circuit will be:
4)
A)
full applied voltage.
B)
unpredictable.
C)
half of applied voltage.
D)
0 V.
5)
A conductor is a material that has ________.
5)
A)
few free electrons
B)
a structure similar to semiconductors
C)
many free electrons
D)
a positive charge
6)
What is the key difference when taking voltage measurements with an analog meter versus a
digital meter?
6)
A)
safety procedure in taking the measurement
B)
adjustment of the scale
C)
proper choice of the scale on the display
D)
where the negative lead is placed
7)
Which unit of charge contains 6.25 × 1018 electrons?
7)
A)
a coulomb
B)
an ampere
C)
a volt
D)
a joule
8)
If a resistor equals 1.2 ±5%, its color code is ________.
8)
A)
brown, red, gold, gold
B)
brown, black, gold, silver
C)
brown, red, silver, gold
D)
brown, black, red, gold
9)
Which of the following is not a type of variable resistor?
9)
A)
photoconductive cell
B)
thermistor
C)
potentiometer
D)
All are types of variable resistors.
10)
To measure a circuit’s source voltage, the voltmeter must ________.
10)
A)
have the black lead towards the positive side of the source
B)
have the red lead towards the negative side of the source
C)
be placed across the source
D)
be placed in series in the circuit
Figure 2–1
11)
Which switch in Figure 2–1 could be used to switch two inputs to different output positions?
11)
A)
graph (a)
B)
graph (b)
C)
graph (c)
D)
graph (d)
E)
graph (e)
12)
In Figure 2–2, a voltmeter placed across points C and D will measure ________.
12)
A)
VR2
B)
VR3
C)
VR1
D)
VR4
13)
In Figure 2–2, the voltage VFG is the same as ________.
13)
A)
VR9
B)
VR6
C)
VR8
D)
VR7
14)
In the American Wire Gauge sizes, as the numerical value of AWG goes higher, the cross sectional
area of the wire:
14)
A)
halves.
B)
increases.
C)
doubles.
D)
decreases.
15)
Identify the DPST switch in Figure 2–1.
15)
A)
graph (a)
B)
graph (b)
C)
graph (c)
D)
graph (d)
E)
graph (e)
16)
A common type of resistors are:
16)
A)
carbon–composition.
B)
wirewound.
C)
carbon film.
D)
metal film.
Figure 2–1
17)
The Rotary switch in Figure 2–1 is most likely to be used as ________.
17)
A)
a range selector switch in an analog voltmeter.
B)
an old manual TV channel selector.
C)
a selector for different voltages in a power supply.
D)
all of the above
18)
An insulator is a material with ________.
18)
A)
some free electrons
B)
very few free electrons
C)
all free electrons
D)
very many free electrons
Figure 2–1
19)
Which switch in Figure 2–1 could be used to open a circuit momentarily?
19)
A)
graph (a)
B)
graph (b)
C)
graph (c)
D)
graph (d)
E)
graph (e)
20)
To measure the current that flows through R6 in Figure 2–2, the circuit must be opened and the
ammeter placed at point ________.
20)
A)
G
B)
H
C)
E
D)
F
Figure 2–1
21)
Identify the Normally Open Push Button switch in Figure 2–1.
21)
A)
graph (a)
B)
graph (b)
C)
graph (c)
D)
graph (d)
E)
graph (e)
22)
In Figure 2–2, the voltage VGH is the same as ________.
22)
A)
VR8
B)
VR6
C)
VR5
D)
VR7
23)
On a resistor with five bands of color code, the fifth band may represent that:
23)
A)
the reliability in percentage of failure.
B)
the tolerance in percentage of value.
C)
the resistor is a precision resistor.
D)
all of these.
24)
A source, a path, and a load ________.
24)
A)
will allow current to flow if the switch is open
B)
can only be an open circuit
C)
do not make up a complete circuit
D)
make up a basic circuit
25)
What do you call a diagram that shows the electrical connections of a circuit’s components?
25)
A)
a schematic diagram
B)
a pictorial diagram
C)
a block diagram
D)
an electrical diagram
26)
Most DMMs will measure ________ ________ and ________.
26)
A)
voltage, frequency, resistance
B)
frequency, voltage, current
C)
voltage, current, capacitance
D)
voltage, current, resistance
Figure 2–1
27)
Identify the Normally Closed Push Button switch in Figure 2–1.
27)
A)
graph (a)
B)
graph (b)
C)
graph (c)
D)
graph (d)
E)
graph (e)
28)
Potentiometers and rheostats differ in that:
28)
A)
potentiometers utilize three terminals, while rheostats usually use only two terminals.
B)
potentiometers are used to vary voltages, while rheostats vary currents.
C)
potentiometers utilize linear and nonlinear tapers, while rheostats usually utilize only linear
tapers.
D)
all of these.
Explanation:
29)
Voltage is ________.
29)
A)
the movement of free electrons
B)
the force that causes water to flow
C)
the opposition to the flow of current
D)
the force that exists between charged particles
Explanation:
Explanation:
30)
If a resistor is color coded with red, red, orange and silver bands, the resistance equals ________,
the lower tolerance limit equals ________, and the upper tolerance limit equals ________.
30)
A)
22 k, 21.5 k, 22.4 k
B)
22 k, 17.6 k, 26.4 k
C)
22 k, 19.8 k, 24.2 k
D)
22 k, 20.9 k, 23.1 k
31)
In Figure 2–2, the voltage VCE is the same as ________.
31)
A)
VR4 + VR5
B)
VR3 + VR4
C)
VR6
D)
VR5
32)
An analog meter has ________.
32)
A)
a digital readout
B)
a high degree of accuracy
C)
no moving parts
D)
a needle and a scale to indicate the value
Figure 2–1
33)
Which switch in Figure 2–1 would probably be used to control a light and a fan at the same time?
33)
A)
graph (a)
B)
graph (b)
C)
graph (c)
D)
graph (d)
E)
graph (e)
34)
A resistor with orange, orange, red and gold bands has a value and tolerance of ________.
34)
A)
33 k±5%
B)
33 k±10%
C)
3.3 k±10%
D)
3.3 k±5%
35)
On a resistor with numbers and letters, the position of the letter in the sequence represents:
35)
A)
the decimal point.
B)
the tolerance.
C)
the numerical total.
D)
the resistance value.
36)
A resistor with yellow, violet, orange, and gold bands equals ________.
36)
A)
4.7 k± 10%
B)
47 k± 5%
C)
47 k± 10%
D)
47 M± 10%
37)
If the measured circuit current is zero, it is likely that the ________.
37)
A)
circuit voltage is very high
B)
voltage is turned off
C)
circuit has a short
D)
resistance is very low
38)
If the current in a circuit equals 0 A, it is likely that the ________.
38)
A)
circuit is open
B)
voltage is too high
C)
resistance is too low
D)
circuit has a short
39)
An ohmmeter should ________.
39)
A)
be inserted into the circuit so the current flows through it
B)
be placed across the resistor after the resistor has been disconnected from the circuit
C)
have the polarity carefully checked before its use
D)
be connected across a circuit with the power on
40)
Every electrical circuit must contain ________.
40)
A)
a source, a load and a path
B)
a source, a load and a resistor
C)
a battery, a resistor and a capacitor
D)
a battery, a path and a switch
Figure 2–3
41)
What does the schematic symbol (b) represent in Figure 2–3?
41)
A)
potentiometer
B)
photoconductive cell
C)
rheostat
D)
thermistor
42)
The opposition to the flow of current is called ________.
42)
A)
resistance
B)
capacitance
C)
current
D)
voltage
A
43)
Interpret the following mixed numbers and letters 3M3 on a resistor to the correct resistance of:
43)
A)
330 Kilohms.
B)
3300 Kilohms.
C)
3.3 Kilohms.
D)
33 Kilohms.
B
44)
A(n) ________ is a material that has many free electrons.
44)
A)
insulator
B)
semiconductor
C)
poor conductor
D)
conductor
D
C
45)
Interpret the following mixed numbers and letters 4R7 on a resistor to the correct resistance of:
45)
A)
4.7 Megohms.
B)
47 ohms.
C)
4.7 Kilohms.
D)
4.7 ohms.
46)
Which type of resistor is used for high power applications?
46)
A)
surface mount
B)
carbon composition
C)
wire wound
D)
film
C
47)
In order to measure the current in a circuit, an ammeter must ________.
47)
A)
be placed so the current must pass through the meter
B)
be placed across the source
C)
be placed across the load
D)
all of these
A
48)
The basic difference between a fuse and a circuit breaker is that:
48)
A)
a fuse is faster.
B)
a fuse is reusable.
C)
a circuit breaker is more reliable.
D)
a circuit breaker is reusable.
D
D
Figure 2–1
49)
Identify the Rotary switch in Figure 2–1.
49)
A)
graph (a)
B)
graph (b)
C)
graph (c)
D)
graph (d)
E)
graph (e)
50)
A 100 k±10% resistor is color coded ________.
50)
A)
black, brown, yellow, silver
B)
brown, black, yellow, gold
C)
brown, green, black, gold
D)
brown, black, yellow, silver
Figure 2–1
51)
Which switch in Figure 2–1 is usually used to control a doorbell?
51)
A)
graph (a)
B)
graph (b)
C)
graph (c)
D)
graph (d)
E)
graph (e)
52)
On a resistor with four bands of color code, the fourth band represents:
52)
A)
the multiplier value.
B)
the wattage rating.
C)
the voltage rating.
D)
the tolerance percentage.
53)
A resistor with yellow, violet, orange and silver bands equals ________.
53)
A)
4.7 k± 10%
B)
47 M± 10%
C)
47 k± 10%
D)
47 k± 5%
C
B)
54)
Identify the DPDT switch in Figure 2–1.
54)
A)
graph (a)
B)
graph (b)
C)
graph (c)
D)
graph (d)
E)
graph (e)
B
B)
E)
TRUE/FALSE. Write ‘T’ if the statement is true and ‘F’ if the statement is false.
55)
Electrons have a positive charge.
55)
56)
Resistance is the opposition to the flow of current.
56)
57)
The ohm is the basic unit of resistance.
57)
D
B)
58)
A resistor color–coded with brown, black and orange bands has a value of 10,000 .
58)
59)
Electrons attract each other.
59)
60)
A resistor color coded with yellow, violet and orange bands has a value of 4.7 k.
60)
61)
A generator converts electrical energy into mechanical energy.
61)
62)
A Normally Open Push Button switch can carry current when not pushed.
62)
63)
An element with a relatively large amount of electrons in the valence ring is considered to be a
good conductor.
63)
64)
To measure the current through a resistor, place the ammeter so the current must pass through the
meter.
64)
65)
Electromotive force is measured in volts.
65)
66)
The movement of free electrons through a conductor is called current.
66)
67)
A SPST switch is used to control one circuit.
67)
68)
The Nickel–Metal Hydride battery is an example of a secondary battery.
68)
69)
For electrical current to flow in a circuit voltage must be applied to that circuit.
69)
Answer Key
Testname: C2
19
Answer Key
Testname: C2
20