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Prospective Employee Assessment

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 

The grounding electrode is defined as __________________.
a.
A conductor used to connect the system grounded conductor or the equipment to a grounding electrode or to a point on the grounding electrode system.
c.
The conductive path installed to connect normally non-current-carrying metal parts of equipment together and to the system grounded conductor or to the grounding electrode conductor, or both.
b.
A conducting object through which a direct connection to earth is established.
d.
A conductor used to connect equipment or the grounded circuit of a wiring system to a grounding electrode or electrodes.
 

 2. 

Identify the PPE Category rating of the following clothing and equipment choices:  Arc-rated long sleeve shirt and pants, arc-rated flash suit hood, pants and jacket, arc-rated rainwear, hard hat and liner, safety glasses, hearing protection, arc-rated gloves and leather work shoes.
a.
Category 1
c.
Category 3
b.
Category 2
d.
Category 4
 

 3. 

Start pushbuttons are connected in _______ when adding additional start pushbuttons to a standard start/stop motor control circuit.
a.
series
c.
parallel series
b.
series/parallel
d.
parallel
 

 4. 

Identify the PPE Category rating of the following clothing and equipment choices:  Arc-rated long sleeve shirt and pants, arc-rated face shield, arc-rated rainwear, hard hat, safety glasses, hearing protection, leather gloves and leather work shoes.
a.
Category 1
c.
Category 3
b.
Category 2
d.
Category 4
 

 5. 

Cutting tools should be ___.
a.
stainless steel
b.
new
c.
sharp and clean
d.
well used
 

 6. 

The equipment grounding conductor is defined as __________________.
a.
A conductor used to connect the system grounded conductor or the equipment to a grounding electrode or to a point on the grounding electrode system.
c.
The conductive path installed to connect normally non-current-carrying metal parts of equipment together and to the system grounded conductor or to the grounding electrode conductor, or both.
b.
A system or circuit conductor that is intentionally grounded.
d.
A conductor used to connect equipment or the grounded circuit of a wiring system to a grounding electrode or electrodes.
 

 7. 

The purpose of a power supply filter is to ____________________________.
a.
change alternating current to direct current
c.
smooth out the DC voltage from the diode rectifier circuit
b.
change direct current to alternating current
d.
produce a cleaner form of the original AC input voltage
 

 8. 

Category 0 PPE requires:
a.
Safety glasses
c.
Leather Gloves
b.
Hearing protection
d.
All of the above
 

 9. 

The operating principle for all three-phase motors is the _______________________.
a.
frequency modulation formula
c.
left-hand rule
b.
rotating magnetic field
d.
the FM principle of electricity
 

 10. 

The grounding conductor will be marked with ________ colored tape in applications where marking is required.
a.
green
c.
white
b.
orange
d.
no
 

 11. 

The ____________ of magnetism states that all substances are made up of an infinite number of molecular magnets.
a.
Two generator rule
c.
Left-hand generator rule
b.
One generator rule
d.
Molecular theory
 

 12. 

A motor does not start to rotate when the operator expects. Normally, pressing the start push button starts this polyphase motor, which is connected through a magnetic motor starter to line voltage and which is itself controlled by way of a three-wire start/stop circuit. Of the items listed below, which could logically be eliminated as a possible cause of the problem, with no further investigation?
a.
The start switch may have failed open
d.
None of the above
b.
There is no control voltage
e.
All of the above
c.
The stop switch may have failed closed
f.
Both a and c
 

 13. 

Improper line phasing might result in __________.
a.
motor FLA/LRA
c.
high motor resistance
b.
corrosion in motor windings
d.
improper motor rotation
 

 14. 

It is dangerous to use an adapter to plug a three-prong plug into a non-grounded receptacle unless a separate _______ is connected to an approved ground.
a.
wire nut
c.
grounding wire
b.
ground wire or strap
d.
ungrounded wire
 

 15. 

A float switch is an example of a(n) ______ control switch.
a.
manual
c.
mechanical
b.
automatic
d.
none of the above
 

 16. 

Step –up or step down, when used with transformers, always refer to____.
a.
Amperage
c.
Power
b.
Voltage
d.
Inductance
 

 17. 

A(n) ______ is an electrical device which consists of a frame, plunger, and coil and is used to open and close a set of contacts.
a.
solenoid
c.
contactor
b.
magnetic starter
d.
none of the above
 

 18. 

___ is the opposition to the flow of electrons.
a.
Power
b.
Current
c.
Resistance
d.
Voltage
 

 19. 

Magnetic motor starter overloads have _______ which sense excessive current flow to the motor.
a.
magnetic sensors
c.
current controls
b.
bifurcated terminals
d.
heaters
 

 20. 

The connection of the system bonding jumper is permitted to be made at the source, or ______ disconnecting means or overcurrent device or any single point between.
a.
the first
c.
any
b.
the second
d.
the line-side
 

 21. 

___ is the property of a circuit that causes it to oppose a change in current due to energy stored in a magnetic field.
a.
Capacitance
b.
Phase shift
c.
Inductance
d.
Frequency
 

 22. 

Stop pushbuttons are connected in _______ when adding additional stop pushbuttons to a standard star/stop motor control circuit.
a.
series
c.
main lugs
b.
front
d.
terminal strips
 

 23. 

The output of a diode rectifier circuit can be filtered by _______________________.
a.
a resistor connected in series with the output
c.
a capacitor connected in series with the output
b.
a resistor connected in parallel with the output
d.
a capacitor connected in parallel with the output
 

 24. 

Ohm’s Law states, among other things, that ______________________.
a.
Current is equal to voltage divided by resistance
d.
All the above
b.
Voltage is equal to current multiplied by resistance
e.
Neither a, b nor c.
c.
Resistance is equal to voltage divided by current
 

 25. 

Voltage should be at least ____ of a solenoid’s rated value.
a.
100%
c.
85%
b.
1.732%
d.
60%
 

 26. 

A DC generator always has a ____ armature and _____field windings.
a.
Moving / nonmoving
c.
Rotating / stationary
b.
Fixed / nonfixed
d.
Commutator / stator
 

 27. 

Ohm’s law states that voltage in a circuit is equal to ___.
a.
current times resistance
b.
current divided by resistance
c.
resistance divided by current
d.
resistance divided by power
 

 28. 

In a line diagram, the overload contacts are shown as connected between the motor and ______.
a.
ground
c.
L2
b.
its drive belt
d.
any other motor
 

 29. 

To change the rotational speed of a three phase induction motor, one must change either the ________ or the _________ applied to the motor.
a.
voltage, current
c.
resistance, reactance
b.
number poles, frequency
d.
power factor, horsepower
 

 30. 

___ is the rate of doing work or using energy.
a.
Power
b.
Current
c.
Resistance
d.
Voltage
 

 31. 

Rags containing oil, gasoline, alcohol, shellac, paints, varnish, or lacquer must be ___.
a.
kept in a covered metal container
b.
stored in a wastebasket
c.
left out to dry
d.
stored in a cool, dry place
 

 32. 

When the ratio of primary coils to secondary coils on a transformer is 1:2, the transformer is known as a(n) ________transformer.
a.
a. step down
c.
c. line reactor
b.
b. cross over
d.
d. step-up
 

 33. 

Each wire in a control circuit is assigned a(n)_______to keep track of the different wires that connect the components in a circuit.
a.
point reference number
c.
point of action number
b.
reference point number
d.
line of departure number
 

 34. 

In a THREE PHASE FIVE WIRE SYSTEM, what is the FOURTH WIRE’s function?
a.
neutral wire
c.
fault assistance
b.
predominate circuit
d.
equipment ground
 

 35. 

In the NEC, a separately derived system is defined as:
a.
A premises wiring system whose power is derived from a source of electrical energy or equipment other than a service.
c.
Both a and b
b.
Separately derived systems have a direct electrical connection, including a solidly connected grounded conductor, to supply conductors originating in the system.
d.
Either a or b
 

 36. 

Derived phase conductors used for a separately derived system sized at 500 kcmil aluminum generally require a grounding electrode conductor not smaller than ________.
a.
4 AWG copper or 2 AWG aluminum
c.
6 AWG copper or 4 AWG aluminum
b.
2 AWG copper or 1/0 AWG aluminum
d.
8 AWG copper or 6 AWG aluminum
 

 37. 

Category 0 PPE requires:
a.
Hard hat
c.
Leather work shoes
b.
Hearing protection
d.
All of the above
 

 38. 

A small air gap is left in the iron core armature to _____.
a.
Prevent eddy currents
c.
Reduce cost
b.
Prevent the armature from staying in a sealed position
d.
Prevent heat buildup in the armature circuit
 

 39. 

A ______  is a device that protects transformers and other electrical equipment from voltage surges caused by lighting.
a.
Surge Electrician
c.
Surge suppressor
b.
Surge Technician
d.
Surge compressor
 

 40. 

The operating system of the S7 CPU executes ___ periodically.
a.
main
c.
OB1
b.
control
d.
function blocks
 

 41. 

A ___connects a brush to the external circuit of a DC motor.
a.
Squirrel tail
c.
Pigtail
b.
Horse tail
d.
Rat tail
 

 42. 

___ is the most common source of energy used to produce electricity.
a.
Oil
b.
Coal
c.
Nuclear power
d.
Water
 

 43. 

The synchronous speed formula is:
a.
mc043-1.jpg
c.
mc043-3.jpg
b.
mc043-2.jpg
d.
mc043-4.jpg
 

 44. 

Tools may be organized using a(n) ___.
a.
pegboard
b.
tool pouch
c.
portable tool box
d.
all of the above
 

 45. 

An ohmmeter test of a diode shows a low resistance reading in both directions. This is an indication that the diode is ______________.
a.
operating normally
c.
faulted open
b.
faulted shorted
d.
faulted grounded
 

 46. 

Identify the PPE Category rating of the following clothing and equipment choices:  Arc-rated long sleeve shirt and pants, arc-rated flash suit hood, arc-rated rainwear, hard hat, safety glasses, hearing protection, leather gloves and leather work shoes.
a.
Category 1
c.
Category 3
b.
Category 2
d.
Category 4
 

 47. 

“___________” contacts are used in some control circuits to form an electrical holding circuit.
a.
Primary
c.
Seal-in
b.
Parallel
d.
Auxiliary
 

 48. 

In order to forward-bias a diode, the more negative potential is applied to the ___________.
a.
gate
c.
anode
b.
collector
d.
cathode
 

 49. 

A danger signal word on a warning sign is used to indicate an imminently hazardous situation which, if not avoided, ___.
a.
may result in minor or moderate injury
b.
could result in death or serious injury
c.
results in death or serious injury
d.
all of the above apply
 

 50. 

A(n) _______ indicates approximate voltage level and type.
a.
watt hour meter
c.
voltage tester
b.
power meter
d.
current meter
 

 51. 

Fuses should be installed ___ when replacing fuses.
a.
line side first
b.
load side first
c.
load and line side simultaneously
d.
with a screwdriver
 

 52. 

A single phase AC motor is usually replaced, rather than repaired, if the horsepower is less than_______ HP.
a.
1/8
c.
1/2
b.
1/4
d.
2
 

 53. 

A line diagram is always read from _____ to ______.
a.
negative; positive
c.
L1; L2
b.
right; left
d.
L2; Ll
 

 54. 

A pushbutton is an example of a(n) _______ control switch..
a.
manual
c.
mechanical
b.
automatic
d.
none of the above
 

 55. 

A control circuit is composed of three basic sections, which are the signal, decision, and_______ sections.
a.
reduction
c.
condition
b.
action
d.
ovation
 

 56. 

In a transformer, the _____ winding is the coil that draws power from the source.
a.
Main
c.
Secondary
b.
Force main
d.
Primary
 

 57. 

What is the synchronous speed of a motor connected to a 50hz source with four poles?
a.
500RPM
c.
1800RPM
b.
1500RPM
d.
1200RPM
 

 58. 

The grounding electrode conductor is defined as __________________.
a.
A conductor used to connect the system grounded conductor or the equipment to a grounding electrode or to a point on the grounding electrode system.
c.
The conductive path installed to connect normally non-current-carrying metal parts of equipment together and to the system grounded conductor or to the grounding electrode conductor, or both.
b.
A conducting object through which a direct connection to earth is established.
d.
A conductor used to connect equipment or the grounded circuit of a wiring system to a grounding electrode or electrodes.
 

 59. 

A ______ diagram is used to show the relationship between circuits and their corresponding components but not the actual location of the components,  
a.
wiring
c.
pictorial
b.
schematic
d.
line
 

 60. 

The most basic type of semiconductor device is the
a.
thermistor
c.
transformer
b.
transistor
d.
diode
 

 61. 

The conductor used to connect the grounded circuit conductor and the equipment grounding conductor at a separately derived system is defined as the __________.
a.
main bonding jumper
c.
equipment grounding conductor
b.
system bonding jumper
d.
bonding jumper
 

 62. 

A(n) _____ is a device that converts various forms of energy into electricity.
a.
conductor
c.
generator
b.
capacitor
d.
provider
 

 63. 

An induction motor requires the same volts per hertz ratio at all speeds. A motor rated at 60hz, 1750RPM and 480V should receive ________ volts at 875RPM.
a.
120
c.
319
b.
277
d.
240
 

 64. 

___ is the amount of electrons flowing through an electrical circuit.
a.
Power
b.
Current
c.
Resistance
d.
Voltage
 

 65. 

A starting winding is also known as a(n)_______.
a.
primary winding
c.
auxiliary winding
b.
secondary winding
d.
first winding
 

 66. 

The power formula states that power in a circuit is equal to___.
a.
voltage divided by current
b.
current divided by voltage
c.
resistance divided by current
d.
voltage times current
 

 67. 

A _________ is used for remote control of devices.
a.
solenoid
c.
contactor
b.
magnetic starter
d.
all of the above
 

 68. 

A(n) ______ is a transformer that is used to step down the voltage to the control circuit of a system or machine.
a.
control transformer
c.
power transformer
b.
system transformer
d.
step up transformer
 

 69. 

In circuits that contain inductance or capacitance, the opposition to the flow of current is ___.
a.
resistance
b.
apparent power
c.
reactance
d.
frequency
 

 70. 

When voltage is applied across a diode in such a way that the diode allows current to flow, the diode is said to be _________________.
a.
short-circuited
c.
forward-biased
b.
open-circuited
d.
reversed-biased
 

 71. 

In a line diagram, the power circuit is shown in __ lines than the rest of the diagram.
a.
heavier
c.
straighter
b.
thinner
d.
none of the above
 

 72. 

PPE is required to work on or near an electrical enclosure. PPE stands for ______.
a.
Plastic Pants Expected
c.
Practical Prevention Equipment
b.
Parental Permission Extended
d.
Personal Protective Equipment
 

 73. 

A change in sound during tool operation normally indicates ___.
a.
normal operation
b.
trouble of some type
c.
the tool is in reverse
d.
overheating
 

 74. 

A rotating magnetic field is created in the __________ of an induction motor
a.
poles
c.
stator
b.
rotor
d.
frame
 

 75. 

DC series motors can develop____ of full – load torque upon starting.
a.
500%
c.
200%
b.
100 %
d.
1000%
 

 76. 

The grounded conductor is defined as __________________.
a.
A conductor used to connect the system grounded conductor or the equipment to a grounding electrode or to a point on the grounding electrode system.
c.
The conductive path installed to connect normally non-current-carrying metal parts of equipment together and to the system grounded conductor or to the grounding electrode conductor, or both.
b.
A system or circuit conductor that is intentionally grounded.
d.
A conductor used to connect equipment or the grounded circuit of a wiring system to a grounding electrode or electrodes.
 

 77. 

Checking polyphase motor windings with a common digital or analog ohm meter will reveal ________ windings.
a.
open
c.
improperly sequenced
b.
internally shorted
d.
reconditioned or new
 

 78. 

Control relays, solenoids, and pilot lights are loads connected directly to line_____.
a.
L1
c.
L3
b.
L2
d.
L4
 

 79. 

In a THREE PHASE FIVE WIRE SYSTEM, what is the FIFTH WIRE’s function?
a.
guide wire
c.
fault assistance
b.
predominate circuit
d.
equipment ground
 

 80. 

X1-X2 indicates the _____voltage side of a 480v transformer
a.
high side
c.
forward
b.
low side
d.
return
 

 81. 

The grounded conductor will be marked with ________ colored tape in applications where marking is required.
a.
green
c.
white
b.
orange
d.
no
 

 82. 

The ___voltage is the minimum control voltage which causes the armature to start to move.
a.
Start up
c.
Fixed start
b.
Pick up
d.
Solid start
 

 83. 

Voltages in a three-phase system are __________ degrees out of phase with each other.
a.
180
c.
90
b.
60
d.
120
 

 84. 

The speed at which the magnetic field of an induction motor rotates is called the _____________.
a.
horsepower
c.
full-load amperes
b.
RPM
d.
synchronous speed
 

 85. 

In order to forward-bias a diode, the more positive potential is applied to the ___________.
a.
gate
c.
anode
b.
collector
d.
cathode
 

 86. 

In a transformer, the ___ winding is the coil that delivers the energy or changed voltage to a load.
a.
Primary
c.
Fixed
b.
Secondary
d.
Non-fixed
 

 87. 

Two methods that are used to determine if a transformer has failed are to measure the input and output voltages and to check the transformer _________.
a.
voltage
c.
current
b.
resistance
d.
power
 

 88. 

The heat produced by ______represents a loss because it does no useful work.
a.
system current
c.
eddy current(s)
b.
power current
d.
copper losses
 

 89. 

The purpose of a diode rectifier circuit is to ____________________________.
a.
change alternating current to direct current
c.
smooth out the DC voltage from the filter
b.
change direct current to alternating current
d.
produce a cleaner form of the original AC input voltage
 

 90. 

A ________ drawing shows the physical details of an object as seen by the eye.
a.
pictorial
c.
line
b.
schematic
d.
wiring
 

 91. 

___ is the amount of electrical pressure in a circuit.
a.
Power
b.
Current
c.
Resistance
d.
Voltage
 

 92. 

A(n) ______ is an electrical device which consists of a frame, plunger, and coil and is used to create a push or pull action.
a.
solenoid
c.
valve damper
b.
pneumatic piston
d.
trigger
 

 93. 

The grounding conductor is defined as __________________.
a.
A conductor used to connect the system grounded conductor or the equipment to a grounding electrode or to a point on the grounding electrode system.
c.
The conductive path installed to connect normally non-current-carrying metal parts of equipment together and to the system grounded conductor or to the grounding electrode conductor, or both.
b.
A system or circuit conductor that is intentionally grounded.
d.
A conductor used to connect equipment or the grounded circuit of a wiring system to a grounding electrode or electrodes.
 

Completion
Complete each statement.
 

 94. 

A(n) ____________________ conductor is a conductor that has been intentionally grounded.
 

 

 95. 

Convert the Hex value FF to binary
 

 

 96. 

A(n) ____________________ is a drill that rotates and drives simultaneously.
 

 

 97. 

All power tools should be grounded unless they are approved ____________________.
 

 

 98. 

A(n) ____________________ is a bar graph that displays a fraction of the full range on the graph at one time.
 

 

 99. 

A(n) ____________________ is a confined space that does not contain or, with respect to atmospheric hazards, have the potential to contain any hazards capable of causing death or serious physical harm.
 

 

 100. 

In circuits that contain resistance and reactance, the combined opposition to the flow of current is ____________________.
 

 

 101. 

Convert decimal 9760 to 4-bit BCD
 

 

 102. 

Class ____________________ fires include burning flammable liquids such as gasoline and oil.
 

 

 103. 

A paint spraybooth interior would be classified (under Article 500 of the NEC®) as ____________________.
 

 

 104. 

To configure the hardware in the S7-300, use the GUI to open the ________ module.
 

 

 105. 

____________________ power is the product of voltage and current in a circuit calculated without considering the phase shift that may be present between the voltage and current.
 

 

 106. 

A(n) ____________________ is an electromechanical device that indicates a value by the position of a pointer on a scale.
 

 

 107. 

When using a receptacle tester, the ____________________ indicates whether the receptacle is wired correctly.
 

 

 108. 

Class ____________________ fires include burning wood, textiles, or paper.
 

 

 109. 

A(n) ____________________ is capable of measuring two or more electrical quantities.
 

 

 110. 

The ____________________ switch on a digital logic probe sets the probe to detect short pulses.
 

 

 111. 

A(n) ____________________ is a device used to determine phase sequence and open phases.
 

 

 112. 

It is dangerous to use an adapter to plug a three-prong plug into a non-grounded receptacle unless a separate ____________________ is connected to an approved ground.
 

 

 113. 

A(n) ____________________ connection is a connection that has two or more components connected so there is only one path for current flow.
 

 

 114. 

When a SLC500 timer element has completed, the ___ will be set.
 

 

 115. 

A(n) ____________________ bonding jumper is a connection at the service equipment that connects the equipment grounding conductor, the grounding electrode conductor, and the grounded conductor (neutral conductor).
 

 

 116. 

The voltage across each load in a(n) ____________________ circuit is the same.
 

 

 117. 

A(n) ____________________ grounding conductor is an electrical conductor that provides a low-impedance ground path between electrical equipment and enclosures within the distribution system.
 

 

 118. 

A(n) ____________________ is a voltage that appears on a meter not connected to a circuit.
 

 

 119. 

Analog meters are less susceptible to ____________________ noise than digital meters.
 

 

 120. 

A(n) ____________________ scale is divided into unequally spaced segments.
 

 

 121. 

SLC 500 user memory is comprised of ________ Files and Program Files.
 

 

 122. 

The current in a circuit containing ____________________ loads is the same throughout the circuit.
 

 

 123. 

A(n) ____________________ connection is a connection that has two or more components connected so there is more than one path for current flow.
 

 

 124. 

Always remove the ____________________ side of a fuse first when removing fuses from circuits.
 

 

 125. 

____________________ is the ratio of true power in an AC circuit to apparent power delivered to the circuit.
 

 

 126. 

A(n) ____________________ is a device that converts mechanical energy into electrical energy by means of electromagnetic induction.
 

 

 127. 

____________________-cutting pliers are used for cutting nails, wire, and rivets close to the workpiece.
 

 

 128. 

A(n) ____________________ has solid-grip jaws and is usually constructed of nylon or laminated fiber.
 

 

 129. 

In SIMATIC Step-7, an input is an I and an output is a(n) ___.
 

 

 130. 

When reading an analog scale, the primary, secondary, and ____________________ readings are added.
 

 

 131. 

An oxygen content of 12% to ___% by volume results in respiration exertion, increased pulse, and impaired coordination, perception, and judgment.
 

 

 132. 

____________________ is the connection of all exposed non-current-carrying metal parts to the earth.
 

 

 133. 

A(n) ____________________ unit is a number that does not include a metric prefix.
 

 

 134. 

Class ____________________ fires include burning electrical devices.
 

 

 135. 

____________________-cutting pliers are used for cutting cable, removing knockouts, twisting wire, and deburring conduit.
 

 

 136. 

Ensure the switch is in the ____________________ position before connecting a tool to a power source.
 

 

 137. 

A(n) ____________________ detects insulation deterioration by measuring high resistance values under high test voltages.
 

 

 138. 

A(n) ____________________ is ideal for pinpointing conduit, pipe, and ductwork locations and distances.
 

 

 139. 

A(n) ____________________ derived system is a system that supplies electrical power derived (taken from) transformers, storage batteries, solar photovoltaic systems, or generators.
 

 

 140. 

A(n) ____________________ is a special DC voltmeter that detects the presence or absence of a signal.
 

 

 141. 

Class ____________________ fires consist of burning combustible metals such as magnesium or aluminum.
 

 

 142. 

High-volume conduit installers generally use electric ____________________.
 

 

 143. 

___________________________ (OBs) are the interface between the operating system of the S-7 CPU and the user program.
 

 

 144. 

A(n) ____________________ is used to display the shape of a voltage waveform when bench testing electronic circuits.
 

 

 145. 

A(n) ____________________ is a confined space that has specific health and safety hazards associated with it.
 

 

 146. 

____________________ rubber matting is specifically designed for use in front of open cabinets or high-voltage equipment.
 

 

 147. 

____________________ energy is stored energy a body has due to its position, chemical state, or condition.
 

 

 148. 

In a SLC500, O:5/0 would designate:
 

 

 149. 

A(n) ____________________ measures the current level in a circuit by measuring the strength of the magnetic field around a single conductor
 

 

 150. 

___ is the process of removing the source of electrical power and installing a lock that prevents the power from being turned ON.
 

 

 151. 

A danger tag is used alone only when ____________________.
 

 

 152. 

A(n) ____________________ indicates approximate voltage level and type.
 

 

 153. 

The SIMATIC _______ manages all data belonging to an automation project, regardless of the target system on which they are implemented.
 

 

 154. 

A SLC500 PLC requires ____________ software loaded in a programming device, like a PC, in order to program and troubleshoot.
 

 

 155. 

A(n) ____________________ is a test instrument that tests for a complete path for current to flow.
 

 

 156. 

A(n) ____________________ is an electrical device that uses electromagnetism to change voltage from one level to another.
 

 

 157. 

Siemens programming software is called _____________.
 

 

 158. 

Electrical parts in the motor of a double insulated tool are surrounded by ____________________ to prevent electrical shock.
 

 

 159. 

A(n) ____________________ is the best system for organizing tools to be used on a jobsite or at a bench.
 

 

Multiple Response
Identify one or more choices that best complete the statement or answer the question.
 

 160. 

What are the two general types of transistor?
 a.
NPN
 c.
PNP
 b.
BJT
 d.
FET
 

 161. 

Transistors are used mainly as _________ and _____________.
 a.
transformers
 c.
amplifiers
 b.
switches
 d.
controls
 

 162. 

Two factors that determine the synchronous speed of a motor are _____________ and ____________________.
 a.
the current through the stator windings in each pole
 c.
the voltage difference between the rotor and stator themselves
 b.
the number of stator poles per phase
 d.
the frequency of the applied voltage
 

 163. 

In order to change the direction of rotation of a three-phase induction motor, one must ______________________.
 a.
reverse any two of its stator leads
 c.
reverse the T1 and T3 leads
 b.
reverse any two of its rotor leads
 d.
swap the rotor leads with the stator leads
 

 164. 

The three leads of an IGBT are identified as:
 a.
collector
 d.
base
 b.
gate
 e.
anode
 c.
emitter
 f.
cathode
 

 165. 

The most important operating characteristic of a diode is that it _________ current in one direction and _________ current in the opposite direction.
 a.
amplifies
 c.
attenuates
 b.
allows
 d.
blocks
 

 166. 

The JFET operates in the ___________ mode, which means it is normally _____.
 a.
absorption
 c.
open
 b.
depletion
 d.
on
 

 167. 

A diode is formed by a doping process which creates __________________ and _______________ semiconductor materials on the same component.
 a.
P-type
 c.
N-type
 b.
fully absorbed
 d.
fully depleted
 

 168. 

The three basic types of three phase motors are:
 a.
the squirrel-cage induction motor
 c.
the universal motor
 b.
the wound-rotor induction motor
 d.
the synchronous motor
 

Matching
 
 
Match the device name with its description or other identifying features
a.
Triac
e.
Darlington Pair
b.
SCR
f.
Photodiode
c.
Thyristor
g.
Zener diode
d.
Diac
h.
MOV
 

 169. 

A PN junction designed to operate in the reverse-bias mode.
 

 170. 

A four layered semiconductor device composed of an anode, cathode and gate.
 

 171. 

A two-terminal device that behaves like two series diodes connected in opposite directions.
 

 172. 

Device which allows current to flow in the reverse direction if the voltage is larger than the breakdown voltage.
 

 173. 

Functions like back to back zener diodes
 

 174. 

A generic term for a broad range of semiconductor components used as an electronic switch
 

 175. 

A semiconductor device that combines two bipolar transistors in a single device so that the current amplified by the first transistor is amplified further by the second.
 

 176. 

A three terminal device essentially equivalent to two SCRs joined in reverse parallel
 
 
Match the SLC500 instruction mnemonics to their meanings
a.
XIC
g.
TOF
b.
XIO
h.
RTO
c.
OTE
i.
CTU
d.
OTL and OTU 
j.
CTD
e.
OSR
k.
HSC
f.
TON
l.
RES
 

 177. 

Triggers a one-time event.
 

 178. 

Examines a bit for an Off condition.
 

 179. 

Examines a bit for an On condition. 
 

 180. 

Counts timebase intervals when the instruction is true. 
 

 181. 

Increments the accumulated value at each false-to-true transition and retains the accumulated value when the instruction goes false or when power cycle occurs. 
 

 182. 

Counts timebase intervals when the instruction is true and retains the accumulated value when the instruction goes false or when power cycle occurs. 
 

 183. 

Decrements the accumulated value at each false-to-true transition and retains the accumulated value when the instruction goes false or when power cycle occurs. 
 

 184. 

Resets the accumulated value and status bits of a timer or counter.
 

 185. 

Counts timebase intervals when the instruction is false. 
 

 186. 

Turns a bit On or Off. 
 

 187. 

One turns a bit on when the rung is executed, and this bit retains its state when the rung is not executed or a power cycle occurs. The other turns a bit off when the rung is executed, and this bit retains its state when the rung is not executed or when power cycle occurs. 
 

 188. 

Counts high-speed pulses from a fixed controller high-speed input. 
 
 
Match the LOGIC ELEMENT with its truth table or description:
a.
AND
e.
NAND
b.
OR
f.
XOR
c.
XNOR
g.
NOT
d.
NOR
 

 189. 

only when all inputs are equal is the output high
 

 190. 

any input state is inverted
 

 191. 

when any input is high, the output is low
 

 192. 

only when all inputs are low is the output low
 

 193. 

only when all inputs are high is the output high
 

 194. 

if any input is low, the output is high
 

 195. 

only when all inputs are equal is the output low
 

Short Answer
 

 196. 

The term IGBT is an abbreviation for ________ ___________ _________ _________.
 

 197. 

IGBTs will be found in many __________.
 

True/False
Indicate whether the statement is true or false.
 

 198. 

Power is the actual power used in an electrical circuit.
 

 199. 

Ohm’s Law states that current multiplied by current multiplied by resistance is equal to power. (I2R=P)
 

 200. 

There are only four diodes in any three phase full-wave bridge rectifier.
 

 201. 

The unit of measure for power is the joule.
 

 202. 

Ohm’s Law states that voltage multiplied by voltage divided by resistance is equal to power. (E2/R=P)
 

 203. 

Ohm’s Law states that voltage multiplied by current is equal to power. (EI=P)
 

 204. 

A diode will be forward biased when the anode is less positive than the cathode.
 



 
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