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Questions
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Answers
1
Each output instruction is assigned to how many output terminals?
Multiple
One
Two
Three
2
What is continually fed during the gas metal arc welding process?
Gases
Flux
Electrodes
Wire
3
Setup area is one of the catergories of welding safety rules. What is the emergency component of the setup area?
Knowledge of the fire extinguisher location
Clean and dry area
Inspection of the equipment
Avoiding breathing welding fumes
4
Assigning the input instructions the same address as the output instruction will allow how many step-sequence programs?
Three
Two
Single
Multiple
5
What device is used before a motor that allows electricity to flow to the motor?
Solenoid valve
Conductor
Motor starter
Control relay
6
NOT logic is formed by __________.
One normally closed input switch
Two normally closed input switches
One normally open input switch
Two normally open input switches
7
What is another name for making a weld?
Heat clamping
Bar clamping
Spot weld
Running a bead
8
Fully automated machines require a __________.
Non-logical circuits
Continuous-cycle reciprocation circuit
Single-cycle cylinder circuit
Stop circuit
9
Resistance is measured in units of __________.
Volts
Watts
Amps
Ohms
10
A magnetic motor starter provides a safe method to channel the flow of current to the electric motor by acting as ______
Valve
Timer
Solenoid
Switch
11
Which PLC enclosure allows for the most expansion of I/O modules?
Brick style
Anchor mount
Interior chassis
I/O chassis style
12
What devices are wired to the relay circuit and are turned on in sequence to create the steps of operation?
Memory
Input
Automatic
Output
13
Which of the following is a disadvantage of spot welding?
It uses an explosive combination of gases
It is very slow
It can only be used to make horizontal welds
It only works on thin metal
14
Current is measured in __________.
Ohms
Pascals
Volts
Amps
15
Which of the following statements is true regarding the relationship between resistance and current?
The lower the resistance, the lower the current
The greater the resistance, the lower the current
Resistance and current are always equal
Resistance and current are not related
16
PLC instructions - control a switch inside it's output module or main enclosure turning power on/off at output terminal.
Direct coil
Reverse coil
Input coil
Output coil
17
An example of memory logic by a control relay is __________.
All of the above
Bypass logic
Manual override
Seal-in circuit
18
Which doesn't accurately describe part of the process of measuring the resistance of a component connected in a circuit?
Disconnect one of the component leads from the circuit
Connect the leads across the component
Turn off the power supply
Make sure the power supply is on
19
When working with a power tool that requires the use of a protective face shield, an employee must ______
At least have one in their work area even if they don't wear it
Use safety glasses instead of a face shield
Not use the tool until they are wearing a face shield
Wear a bandana if a face shield is not available
20
Which PLC Program Language resembles rungs of a ladder?
Instruction list
Structure text
Sequential Function Chart
Ladder logic
21
The best piece of test equipment for tracing wire is the __________.
Ammeter
Tachometer
Ohmmeter
Oscilloscope
22
Which of the following is a formula for calculating power?
None of the above
P = E/ R
P = I x E
P = I x R
23
Which PLC program has parallel rungs like a wiring drawing?
Ladder logic
Sequential Function Chart
Instruction list
Structure text
24
Output devices transfer electrical energy to what other kind of energy?
Light
All of the above
Sound
Movement
25
What contacts need to be used to make sure seal-in logic is working properly and safe?
Logic contacts
Motor starter coil
Positive / Negative contacts
Auxillary contacts
26
How does a PLC control different types of machines and processes?
By moving wires
By programming
By wireless control
By Bluetooth
27
Sometimes, time-delay relays are used in place of limit switches for __________.
Powering
Pick and place operations
Sequencing
Homing operations
28
The flow of electrons stops when the circuit is __________.
Closed
Increased
Opened
Decreased
29
Electronic sensors usually use a transistor output as the __________ mechanism of the sensor.
Sensing
Switching
Amplifying
Conducting
30
What do symbolic I/O addresses do for a program?
Make it easier to read
Provide symbols in place of IO addresses
Make it more difficult to read
Make it more difficlut to troubleshoot
31
What is the definition of a fillet weld?
Divides two pieces formally welded together
Joins two pieces of metal to form an angle
Joins butt joints
Joins only corner joints
32
Which type of welding is considered as quick and easy to complete?
Arc
Spot
Oxy-acetylene
Shielded metal arc
33
Which of the following is true according to Kirchhoff's Current Law?
The sum of the branch currents > than the current leaving the power supply.
None of the above
The sum of the branch currents = amount of current leaving the power supply
The sum of the branch currents < than the current leaving the power supply.
34
An ohmmeter must never be used on a circuit that may be __________.
Open
Capacitive or inductive
Energized with a voltage
Shorted
35
Which welding joint is used to create a ladder?
Lap
Butt
T-joint
Corner
36
A motor control circuit is a common application of what type of logic element?
NOT
NAND
NOR
Memory
37
The only person authorized to remove a lockout/tagout device is _______
The person who installed it
The supervisor
The next person on shift
The quality technician
38
What is one characteristic of a good weld?
Speed weld was created
Appearance
Limited pitting of the weld
Less expensive
39
An OR logic circuit is formed by __________.
Two normally closed input switches in series
Two normally open input switches in parallel
Two normally open input switches in series
Two normally closed input switches in parallel
40
What device provides the means by which electrical circuits control pneumatic or hydraulic systems?
Pushbutton
Relay
DCV
Motor
41
What is the definition of shielded metal arc welding?
Creates an arc between oxygen and acetylene
Creates an arc between an electrode and a workpiece
Creates a joint between oxygen and acetylene
Creates a joint between two gases
42
The horizontal line to the right of each input device represents what part of an I/O diagram?
PLC input terminal
Power rail
PLC input wiring
Input power wiring
43
Which welding joint is completed by jointing the ends of two pieces?
T-Joint
Corner
Lap
Butt
44
Which of the following elements describes two or more normally closed input switches in series?
NOT
NOR
OR
NAND
45
What is one advantage of Gas tungsten arc welding?
Accuracy
Vertical welds
Only product horizontal welds
Slow process
46
A control circuit that uses limit switches to sequence a series of events is called a(n) __________.
Synchronized circuit
Stair-step circuit
Follow the leader circuit
Event sequencing circuit
47
A(n) __ is an input switch that senses position of a machine member and converts the position into an electrical signal
Limit switch
Analog switch
Logic switch
Control circuit
48
What is the definition of a tack weld?
Weld used in moisture area
Small temporary weld
Final weld of thin pieces
Decorative weld
49
What do higher currents indicate?
That electrons are moving more quickly.
That more electrons are moving in a given time period.
That electrons and neutrons are moving more quickly.
That more electrons and neutrons are moving in a given time period.
50
The unit of measurement for voltage is the __________.
Volt
Watt
Ohm
Amp
51
Limit switches are most commonly used to do what in a machine's operation?
Sequence a series of events
Reset the machine's program
Start operation
Stop operation
52
When multiple shifts are working on down equipment, You should verify energy state, then change locks as part of the ___
Security drill
Reactive maintenance
Lockout/tagout procedure
Power test
53
When the wire or foil strip inside a fuse melts, the fuse is said to be __________.
Shot
Done
Blown
Tripped
54
How does a safety interlock prevent an action?
Interlock works only when another action has taken place
Interlocks are safety blocks
Interlocks require three actions to take place prior to working
Interlock works only when activated
55
Bad equipment grounding can cause which problem?
Machine underspeed
Shock hazard
Machine overspeed
An overloaded motor
56
Five common types of electronic sensors include: inductive, capacitive, photoelectric, hall effect, and __________.
PNP transistors
Logic switch
Limit switch
Magnetic reed switch
57
What is the purpose of a butt joint?
Increase the length of the original piece
Create a T shape connection
Shape the surface area of the pieces
Create a corner connetion
58
For what reason is detached symbology used in schematics having control relays?
Because the components of a control relay are physcially separate
It is considered a shortcut
Because control relay components are wired in different parts of a circuit
Detached symbology is not used in schematics having control relays
59
To find the total resistance in a series circuit, __________.
Multiply the individual resistances
Add the individual resistances
Subtract the individual resistances
Average the resistances
60
______ is required at all times in designated areas to defend against workplace hazards
An ID badge
Authorization
Proper PPE
Thick clothing
61
Where there is no continuity found when testing with a DMM, the screen may display this.
VO
0
Null
OL
62
Robots are classified into four groups: Type of motion, servo or non-servo, number of axes, and _____
Hyrdaulic or pneumatic
Stationary or mobile
Pneumatic or electric
Linear or rotational
63
Technicians should have their own _____ that contain their identification and individual keys
Lockout/tagout devices
Lunch boxes
Teach pendant
Power supply
64
What controls fluid power motors?
Electric magnetic starter
Directional control valve
PLC structure control
Fluid motor control
65
Setting the gas pressure includes a pressure gauge and what other gauge?
Flow control
Flow
Needle
Metric
66
Which of the following is not a component of a limit switch?
All of the above
Optical sensor
Actuating mechanism
Contacts
67
Seal-in logic keeps the output in what state when input is removed?
On
Hold
Off
Load
68
3 factors to determine welder settings: The type of metal being welded, the thickness of the metal, and _______
Mounting position of metal
Voltage settings
Speed value of wire insert
Purity setting of gases
69
Which welding method includes low cost, commonly used outdoors, and doesn't use electricity?
Oxy-acetylene
Spot
Arc
Shielded metal arc
70
What can be controlled on the panel of GMAW welding system controls?
Voltage, wire feed, power
Amps, flux speed, power
Amps, gases feed, power
Voltage, flux feed, power
71
What are the axes of a robot named?
Head, shoulder, knees
Shoulder, elbow, fingers
Elbow, wrist, fingers
Shoulder, elbow, waist
72
The input diagram includes input power wiring, PLC input wiring, power rail, PLC input terminal and what else?
Input devices
Structure devices
Output devices
Feedback devices
73
If AC power cycles back and forth 50 times per second, what is its frequency?
.83 Hz
40 Hz
60 Hz
50 Hz
74
A __________ circuit is one in which there is only one path for current to travel.
Series
Parallel
Complex
Closed
75
Which of the following shows the connections for power devices?
Power diagram
Wiring diagram
Ladder diagram
Schematic diagram
76
What operation must happen to enter an address symbol?
Typing the name
Opening the symbol file and entering a name
Picking a symbol form the task bar
Create a file of symbols to use
77
Which of the following is not an advantage of electronic sensors?
Higher operating speed
Low power handling ability
Long operating life
No physical contact with object being sensed
78
When hard finished material needs to formed or aligned, use a _____ to prevent damage to the surface
Brass hammer
Chipping hammer
Hand grinder
Sledge hammer
79
Jogging a servo robot means ______
To put the robot in a safe position
Manually moving the robor arm to a new position without a program
Stopping the robot in place
Preparing the robot to shutdown
80
Which type of sensor uses sound waves to sense a part?
Capacitive
Limit switch
Photoelectric
Ultrasonic
81
PLC executes a 3-step process called scan cycle. Scan cycle includes Input scan and Output scan, what is the third step?
Feedback scan
Program scan
Message scan
Process scan
82
Which of the following is a function of a safety interlock switch?
It stops the machine if the guard is removed
It keeps the operator from moving parts while lthe machine is powered
It prevents machine startup if the guard is not in place
All of the above
83
What is the purpose of flux in shielded metal arc welding?
Cleans and protects the base material
Cleans the electrodes and base material
Provides a filler material
Cleans the electrodes
84
__________ targets are the only targets that can be detected by an inductive proximity sensor.
Nonmetallic
Metallic
Plastic
Wood
85
What is a name for a device that converts electricity into work?
Input device
Load
Supply
Converter
86
Reverse flow check valves are connected to gas supply lines to ______ of oxygen and fuel gases
Prevent the co-mingling
Monitor the flow rate
Increase the heat
Check the level
87
A PLC is classified by their enclosure. What is the other enclosure besides I/O chassis?
Interior chassis
Brick style
Anchor mount
Interior mount
88
This provides the interface between the PLC and the starter contacts in a magnetic motor starter.
Solenoid
Switch
Contact
Timer
89
An inductive proximity sensor uses the principle of __________ to sense the presence of a metallic object.
Conduction
Capacitance
Transduction
Induction
90
Electricians use __________ to protect electrical wiring to motors and other loads from being damaged.
Rigid or flexible conduit
Electrician's tape
Signs
Control panels
91
These robots are used in the food, pharmaceutical, and electronics industries.
Delta
SCARA
Articulated
Gantry
92
A(n) __________ gives the operator control over an electrical circuit.
Capacitor
Input device
Output device
Solenoid
93
Which PLC Program Language evolved from the computer language Pascal?
Ladder logic
Sequential Function Chart
Structure text
Instruction list
94
Heating two metal edges to a molten state and allowing them to combine is welding. What are positive aspects of welding?
Two pieces become one; strongest method of fastening
Two pieces become one and can be disassembled easily
Two pieces become one; expensive method of fastening
Two pieces become one; weaker than base metal
95
What method is used to determine the initial state of each output in the ladder diagram?
Look at the outputs
Look at the loads
Determine the initial status of the inputs
Look at the power diagram
96
Photoconduction is the ability of a material to conduct __________ when struck by light.
Electrical voltage
Electrical current
Resistance
Electircal wattage
97
The __________ includes the electronic circuitry and components that detect the presence of an object.
Power supply
Sensor
Application
Switch
98
Magnaflux testing is also known as _____ testing
Magnetic-particle
X-ray
Dye penetrant
Magmaflex
99
Servo Robots use Pmove or point move to program the robots movements. The points are most often recorded using a ______
Teach pendant
Display Screen
PC file
Controller
100
What is an ICE cube relay?
A machine control relay used for heavy duty applications
A relay that does not have a coil and armature
A general purpose relay used for light duty applications
A relay used in an ice maker
101
How are different corner joints created?
Moving the pieces so they touch less or more
Moving the weld to cover more of the pieces
Moving the weld and the pieces
Changing the angle of the corner
102
What engages the wire feed on the GMAW welding system controls?
Tension control knob
Control knob
Gun's trigger
Speed control knob
103
Which of the following is an application of a relay?
Performing control logic
Energizing a fluid power valve solenoid
Seal-in circuit
All of the above
104
What is one of the most common PLC applications?
Start/stop constant electric motor
Start/stop production conveyors
Start/stop material feeders
Start/stop inspection controls
105
Rules protect the operator and the robot. Operator must complete safety system and training, locate E-stops, and ______
Monitor the material handling of the robot
Monitor the controls and nearby personnel
Maintain and monitor the parts being produced
Complete a quality check on each part produced
106
What is another name for Gas tungsten arc welding?
Metal inert gas (MIG) welding
Flux less welding
Arc welding
TIG welding
107
Which type of device is the relay's solenoid coil in the control logic?
Input
Output
Latching
Memory
108
Which of the following statements describes a limit switch?
It is a simple, low-in-cost, reliable device
All of the above
It is one of the most frequently used input devices on automatic machines
It is a switch used to sense the position of a machine arm
109
The magnetic reed switch is a fast operating, single-pole, single-throw switch with a _________
Transistor output
NC contact
Magnetic case
NO contact
110
What is the most common clamping device?
Bar clamp
Spring clamp
C-clamp
Adjustable wood clamp
111
Which of the following is an element of control logic?
All of the above
NOR
NOT
AND
112
Which of the following logic elements describes two or more normally closed input switches in parallel?
NAND
NOT
NOR
AND
113
What material holds moisture and can explode if directly welding on it?
Brass
Steel
Ferrous metals
Concrete
114
Internal output addresses are known as memory coils, internal variables, and what else?
Memory bits
Internal coils
Output variables
Maximum coils
115
What is the most basic operation of a PLC?
Controlling conveyor systems
Controlling machine sequence
Operating solenoid valves
Controlling solenoid valves
116
Oxy-Acetylene welding uses which gas to increase flame temperature?
Acetylene
Neither increase the flame temperature
Both oxygen and acetylene increase temperature
Oxygen
117
Which of the following statements is not true of a ladder diagram?
It can have more than on einput device rung
It arranges wires in orderly rows
It shows input devices on the left side
It can have more than one output device on each rung
118
Just like reading a book, the best way to read a ladder diagram is from left to right.
True
False
119
The schematic symbol shown is a __________ limit switch.
N.C.
N.O.
N.C.H.O.
N.O.H.C.
120
Faults are most likely to occur where in a robotic system?
Gripper
Drive motors
Sensor/actuator interface
Teach pendant
121
What are often constructed of a combination of series and parallel segments?
Circuits
Supplies
Loads
Resistors
122
The Rockwell CCW program has 7 components: menu bar, toolbar, and status bar. What is the name of another component?
Crow bar
Flat bar
Toolbox
Programming bar
123
An example of a manually operated single cycle reciprocation circuit is a __________.
Lathe
Drill
Typewriter
Punch press
124
What are input and output terminals that never change called?
Dynamic addresses
Permanent addresses
Terminal addresses
Absolute addresses
125
A capacitive sensor uses the principle of __________ to sense the presence of an object.
Inductance
Conduction
Capacitance
Transduction
126
Check __________ with an ohmmeter.
Resistance
Power factor
Voltage
Current
127
Once the project is downloaded into the PLC's memory, what is the next step of operation?
Place the PLC in DOWNLOAD mode
Place the PLC in RUN mode
Place the PLC in ACCEPT mode
Place the PLC in TEST mode
128
Which is an example of the use of safety interlocks?
Machine power downs
Machine runs after all guards are in place
Machine guards are not important
Machine runs when turned on
129
Devices consisting of a glass tube containing two small ferromagnetic (easily magnetized) metal reeds are called _______
Magnetic reed switches
Photoelectric sensors
Capacitive sensors
Hall effect sensors
130
To keep a gas cylinder from being accidentally knocked over, it should be _____
Moved to a location way from heavy foot traffic
Stored with the regulator in place
Securely chained
Stored on its side
131
Which of the following is not a component of a ladder diagram?
Output device
Conductor
Input device
Valve
132
Kirchhoff's Current Law(Series circuit)-Current entering any point in a circuit must ____ the current exiting same point
Equal
Double
Exceed
Exactly half
133
Which type of weld hold the pieces so they overlap each other?
Corner
Lap
T-joint
Butt
134
Turning outputs on or off through relay contacts is called __________.
Control logic
Indirect actuation
Bypass logic
All of the above
135
What must be done on two pieces of a butt joint before being welded?
Cut a groove so the final piece will be angled
Cut each square so the surface will be square
Cut each square so the final part will be flush
Cut a groove so the groove weld can be completed
136
What does the abbreviation NC stand for?
Normally Closed
Naturally Closed
Normally Controlled
Not Controlled
137
PLC address identifies a location here, where the status of an input, output (memory or instruction statuses) is stored.
Output
Terminal
Memory
Input
138
Where is single phase power most commonly used?
Rural communities
Household devices
Electric motors over 5 hp
Industrial plants
139
To ensure the power remains off during a repair is the purpose of
Caution tape
A light switch
Lockout/tagout procedure
The E-stop
140
A(n) __________ tester is used to check for a break in a wire.
Hand
Continuity
Voltage
Amperage
141
The following graphic shows an example of what type of logic element?
NOR
AND
OR
NAND
142
Which of the following is a rule for drawing a ladder diagram?
All of the above
Number all rungs
Label all components
Use only one load per rung
143
A limit switch used to sense if the guard is in place on a machine is called a(n) __________.
Kill switch
Prong detector
Safety interlock switch
Idiot switch
144
The welding surface must be smooth, clean, and grease free. How should grease be removed from the surface?
Apply water
Wipe it off
Soap and water
Apply a degreaser
145
A sensor is a device whose purpose is to __________ and send the information to other electronics.
Detect events or changes in environment
Adjust switches
Set alarms
Compute data
146
Relays, called __________, often serve as the brains of an automated machine.
Controllers
Power supplies
Switches
Latches
147
Which type of welding used a power supply and 2 arms containing electrodes?
Oxy-acetylene welding
Spot welding
MIG welding
TIG welding
148
________ grippers are used to pick up flat parts that cannot easily be grasped
Vacuum
Cutting tool
Pincher
Sticky
149
An electromechanical relay includes which of these components?
NO and NC contacts and a ferrous element
Two set of NO contacts, and a solenoid coil
NO contact, NC contacts, and a solenoid coil
Two sets of NC contacts, and a solenoid coil
150
In Rockwell's CCW software, a discrete variable has a Data Type of this?
BOOL
UDINT
UINT
SINT
151
Gas metal arc welding is similar to SMAW but has a ______ fed electrode wire
Short
Complex
Continuously
Fast
152
Which item below is used in oxy-acetylene welding?
Electricity
Arc between electrodes
Wire feed
Pure oxygen
153
A magnaflux test is used to show what flaw in ferrous metal welds?
Magnetism
Hardness
Flatness
Cracks in the surface
154
Which of the following is NOT a type of circuit protection device?
Power supply
Circuit Breaker
Fuse
GFCI
155
For each sequence, three steps must take place in a control process; they include:
Input, Tag ID, Output
Output, Control, Input
Input, Logic, Input
Input, Logic, Output
156
If a motor has an excessive load, what event is most likely to occur?
Blow a fuse or trip an overload
Operate normally
Melt the motor starter contacts
Increase speed
157
Which is not an application of Ohm's Law?
Troubleshooting circuits
Sizing components
Determine voltage drop across a component
Determine frequency of a component
158
Which one of the following logic elements describes a circuit with two normally open input switches in series?
NAND
NOT
AND
OR
159
Safety interlocks are used in machines to do what?
They make sure pressures and temperatures are correct
They make sure guards are in place
They prevent a machine from starting or shut it down
All of the above
160
What is the preferred unit of measure for power?
Watt
Horsepower
Amp
BTU
161
What is another name for gas metal arc welding?
TIG welding
Flux less welding
Arc welding
Metal inert gas (MIG) welding
162
A robotic system _____ backup typically has a two year life expectancy
Motor driver
Lithium battery
Servo motors
Solid state drive
163
Which is the most basic type of limit switch?
Single pole single throw
Single pole double throw
Single throw double pole
Single pole triple throw
164
Which term is defined by the total operating current of a circuit?
Full Current
Load Amperage
Full Amperage
Full Load Amperage
165
A(n) __________ is used to measure resistance.
Ammeter
Flow meter
Ohmmeter
Voltmeter
166
If a wire measured with a multimeter has continuity, it __________.
Cannot conduct current
Has an open
Will conduct current
Cannot be used in a circuit
167
__________ materials conduct magnetic lines of force very well.
Ferromagnetic
Diamagentic
Dielectric
Paramagnetic
168
Which term describes the amount of voltage used by a component?
Voltage drop
Voltage fall
Voltage exhaustion
Voltage drain
169
To keep a photoelectric sensor from being actuated by sunlight or regular lighting, sensors generally use _______ light.
X-ray
Infrared
Ultraviolet
Visible
170
What type of drawing is a ladder diagram?
Pictorial diagram
Power diagram
Rung diagram
Electrical schematic
171
Which type of circuit breaker trips immediately when needed under all circumstances?
Both of the above
Magnetic
Thermal
None of the above
172
A power diagram is needed with a ladder diagram to __________.
Show the logic of the circuit
Determine the power device operation when the output is energized
Determine what signals are sent to the power device
All of the above
173
Kirchhoff's Voltage Law for a series circuit says that the total voltage is equal to the __________.
Product of the voltage drops
Smallest voltage drop
Largest voltage drop
Sum of the voltage drops
174
What must be added to a single-cycle reciprocation control circuit to make it repeat its cycle continuously?
Another start pushbutton
Another cylinder
Another limit switch
Another DCV
175
Which robots use an X-Y-Z coordinate system?
Gantry
Articulated
Cartesian
SCARA
176
A tool with a three-prong plug should be used __________.
If the plug is not polarized
If the prongs are not made from brass
Even if the ground prong has been removed
Only if all three prongs are present
177
Which type of logic element uses a control relay to keep an output energized after the input signal has been removed?
NOR
NOT
Memory
NAND
178
______ should be stored a minimum of 25 feet (8 meters) from combustion points?
Oxygen cylinders
Machine tools
Welding rods
Micrometers
179
The flow of electricity to a solenoid is carried through __________ to protect other devices.
Relay contacts
A capacitor
Shielded cable
Uninsulated wires