Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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_____ is a form of energy that can produce light, heat, magnetism, and chemical
changes.
a. | Electricity | c. | Power | b. | Gas | d. | Methane |
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2.
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Identify the unit used to measure a material’s resistance to the flow of
electrical current.
a. | volt | c. | ampere | b. | ohm | d. | watt |
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3.
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How many watts are used for one hour in a kilowatt-hour?
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4.
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Electricity comes into a building by way of _____.
a. | an entrance panel | c. | fuses | b. | circuit breakers | d. | a voltage meter |
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5.
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Electrical switches are placed on _____ wires only.
a. | hot | c. | neutral | b. | cold | d. | ground |
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6.
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What is the traditional unit of measurement for woodworking and metalworking in
the United States?
a. | meter | c. | millimeter | b. | foot | d. | inch |
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7.
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Name the welding process primarily for welding ferrous metals such as iron and
steel.
a. | SMAW | c. | GTAW | b. | GMAW | d. | Flux Core |
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8.
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What is a common name for the SMAW process?
a. | MIG | c. | Arc/Stick | b. | TIG | d. | Oxy-Fuel |
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9.
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What does the 70 stand for in E7014?
a. | 70,000 lbs tensile strength | c. | 70 days until
expiration | b. | 7,000 degrees Fahrenheight | d. | Weld in 70 different positions |
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10.
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The recommended shade lens for arc welding is:
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11.
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Current that changes direction 120 times per second on a 60 MHz cycle.
a. | AC | c. | Voltage | b. | DC | d. | Amperage |
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12.
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Type of circuit in which power is run to each individual device without first
passing through any other device.
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13.
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Agricultural mechanics shops should have large, _____ areas for projects,
machinery repairing, and building.
a. | colorful | c. | seated | b. | open | d. | cold |
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14.
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A/An ____________________ is the discharge of electricity through an air
space.
a. | arc | c. | lightning bolt | b. | spark | d. | striker |
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15.
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Any material that permits current to move through it is a
____________________.
a. | insulator | c. | transformer | b. | conductor | d. | grounder |
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16.
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A ____________________ is a measure of electrical pressure.
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17.
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In terms of gauge for electrical wiring, the lower the gauge, the
____________________ the size of the wire.
a. | larger | c. | longer | b. | smaller | d. | shorter |
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18.
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Making an additional connection between a piece of equipment and the earth is
called ____________________.
a. | grounding | c. | both grounding and bonding | b. | bonding | d. | arcing |
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19.
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A ____________________ is a device for receiving electric plugs.
a. | receptacle | c. | single pole switch | b. | keyless lamp | d. | three phase
generator |
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20.
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Which of the following is not a piece of protective
clothing?
a. | coveralls | e. | earplugs | b. | footwear | f. | safety glasses | c. | gloves | g. | ripped jeans | d. | hard hat |
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21.
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____________________ refers to organized activities that the student does
outside the agricultural class or laboratory to develop agricultural skills.
a. | Supervised Agricultural Experience | c. | Work Based
Learning | b. | Supervised Occupational Internship | d. | Dual Enrollment |
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22.
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____________________ is the key to a clean shop.
a. | Organization | c. | Clean up wheel | b. | A lot of students | d. | Sweeping |
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23.
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A/An ____________________ describes a material that provides great resistance to
the flow of electricity.
a. | insulator | c. | cable | b. | conductor | d. | regulator |
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24.
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_________ is
the process of measuring land by recording elevations, directions, and lengths of property lines and
sizes of structures.
a. | Measuring | c. | Grading | b. | Leveling | d. | Surveying |
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25.
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A/an __________ rod is a leveling rod that is graduated in feet, inches, and
eighth of an inch. They are typically used by carpenters and other trade workers.
a. | engineer’s | c. | metric | b. | conductor’s | d. | landscaper’s/architect’s |
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26.
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A/an __________ rod is a leveling rod that is graduated in feet, tenths of feet,
and hundredths of feet. They are typically used by surveyors and engineers.
a. | engineer’s | c. | metric | b. | conductor’s | d. | landscaper’s/architect’s |
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27.
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When leveling, the starting point which is a point of known elevation or assumed
elevation is known as the:
a. | start | c. | benchmark | b. | origin | d. | true north |
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28.
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The leveling instrument is supported by a tripod which has __________ legs for
support.
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29.
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The difference between the top and bottom of a black line on an engineer’s
rod is __________.
a. | 1/8 of an inch | c. | 1 inch | b. | 0.01 foot | d. | 0.10 foot |
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30.
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The telescope tube of some levels contains 3 horizontal cross hairs. The top and
bottom cross hairs are called __________ and may be used to measure horizontal distances.
a. | pin sights | c. | stadia hairs | b. | distance sights | d. | backsights |
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31.
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A 5-ampere motor running on 120 volts will consume _______ watts of
electricity. Use the formula W = V x A.
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32.
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If Watts = Volts x Amperes, then how many amperes are produced on a 120 volt
circuit by a 1200 watt appliance?
a. | 1 ampere | c. | 100 amperes | b. | 10 ampere | d. | 1 milliampere |
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33.
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In a 120-volt circuit, the conductor with black
insulation must be used as the
a. | equipment grounding conductor | c. | grounded
conductor | b. | ungrounded conductor | d. | grounding electrode conductor |
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34.
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White wires used as an ungrounded conductor must be
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a. | connected to black wires | c. | stripped of all
insulation | b. | connected to all fixtures | d. | taped or painted black |
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35.
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What size circuit breaker should be used to protect
a type NM 12/2 with ground copper wire?
a. | 50 amp | c. | 30 amp | b. | 40 amp | d. | 20 amp |
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36.
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When arc welding, injury to the eyes can result
from
a. | Chipping without eye protection | c. | Welding with less than a No. 10 lens
| b. | Viewing welding without a helmet or shield | d. | All of the
above |
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37.
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__________ is the process of measuring land by
recording elevations, directions, and lengths of property lines and sizes of
structures.
a. | Measuring | c. | Grading | b. | Leveling | d. | Surveying |
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38.
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A __________ is a measuring device made of wood,
plastic, or aluminum that is specifically designed to be used with a leveling instrument and are read
using the telescope of an optical level.
a. | measuring tape | c. | leveling rod | b. | measuring wheel | d. | level |
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39.
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A __________ is used to determine a vertical line
and to position a leveling instrument over a specific point on the ground.
a. | level | c. | transit | b. | plumb bob | d. | leveling rod |
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40.
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Electricity travels at.
a. | the speed of sound | c. | 186,000 miles/sec | b. | the speed of light | d. | both b and c |
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41.
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I = E/R or A= V/R where A=amps, V=volts and R=resistance.
a. | Ohm’s Law | c. | Edison’s Law | b. | Westinghouse Law | d. | Atkinson’s
Law |
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42.
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A welder puts out high amperage, so it needs
a. | large electrical cables | c. | long electrical
cables | b. | small electrical cables | d. | no electrical cables |
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43.
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Why is it important to store projects properly?
a. | so that they do not interfere with the work of others | b. | so that they are not
damaged by others using the shop | c. | so that they can be evaluated by the
foreperson | d. | both “so that they do not interfere with the work of others” and
“so that they are not damaged by others using the shop” |
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44.
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What must be provided for a shop cleanup system to work well?
a. | fair assignment of every task to someone | b. | rotation of
assignments | c. | a genuinely honest record of performance | d. | none of these
answers is correct | e. | “fair assignment of every task to
someone,” “rotation of assignments,” and “a genuinely honest record of
performance” |
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45.
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What are the three main components of an atom?
a. | Protons, Neutrons, Volts | c. | Electrons, Volts,
Amps | b. | Protons, Neutrons, Electrons | d. | Nucleus, Orbit,
Circuit |
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46.
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Which particle in an atom carries a negative charge and orbits the
nucleus?
a. | Proton | c. | Electron | b. | Neutron | d. | Nucleus |
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47.
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Electricity is defined as the flow of ______ from one atom to another.
a. | Protons | c. | Electrons | b. | Neutrons | d. | Nuclei |
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48.
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What is the maximum amperage rating for 14 AWG wire?
a. | 15 Amps | c. | 30 Amps | b. | 20 Amps | d. | 60 Amps |
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49.
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Which wire gauge is typically used for standard household outlets (20 Amp
circuit)?
a. | 14 AWG | c. | 10 AWG | b. | 12 AWG | d. | 8 AWG |
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50.
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When counting conductors for box sizing, how many conductors does a device (like
a switch or receptacle) count as?
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51.
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Which tool is specifically designed to remove the outer plastic sheathing from
Type NM (Romex) cable?
a. | Lineman Pliers | c. | Cable Rippers | b. | Wire Strippers | d. | Long Nose
Pliers |
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52.
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Which fastener size is used to mount devices (switches/outlets) to a handy or
device box?
a. | 8/32 | c. | #10 Hex Head | b. | 6/32 | d. | Drywall Screw |
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53.
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What is the purpose of a "Box Connector"?
a. | To connect two boxes together | c. | To splice wires together inside the
box | b. | To protect wires from physical damage and hold them in place entering a
box | d. | To mount the box to the
stud |
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54.
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Romex staples must be placed within how many inches of a box?
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55.
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When creating a hook for a terminal screw, which direction should the opening of
the hook face?
a. | To the left | c. | Towards the insulation | b. | To the
right | d. | It doesn't
matter |
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56.
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What is the primary function of a circuit breaker?
a. | To increase voltage | c. | To protect the circuit from drawing too many amps (overcurrent
protection) | b. | To turn lights on and off | d. | To measure watts |
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57.
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What is the standard formula for determining distance using Stadia lines?
a. | (Top Reading + Bottom Reading) ÷ 2 | c. | (Top Reading - Bottom Reading)
× 100 | b. | (Top Reading - Bottom Reading) × 10 | d. | Top Reading × Bottom
Reading |
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58.
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If your top stadia reading is 6.25 ft and your bottom stadia reading is 5.81 ft,
what is the distance from the instrument to the rod?
a. | .44 ft | c. | 4.4 ft | b. | 44.0 ft | d. | 440 Ft |
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Completion
Complete each
statement.
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59.
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Slag is a good ____________________.
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60.
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A machine that produces current for welding is known as an
____________________.
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61.
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An ____________________ is the discharge of electricity through an air
space.
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62.
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The ____________________ is the percentage of time that a welder can operate
without overheating.
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Matching
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Match the following type of wiring connection to the appropriate wire colors
(answers may be used more than once). a. | ground | c. | neutral | b. | positive (or
hot) |
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63.
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black
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64.
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white
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65.
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bare
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66.
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red
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67.
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green
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Match the following type of screw color to the appropriate wire colors
(answers may be used more than once). a. | green or uncolored
screws | b. | yellow screws | c. | white or silver
screws |
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68.
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black
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69.
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white
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70.
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bare
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71.
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red
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72.
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green
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Match the following meaning with their color codes. a. | safety | d. | danger | b. | caution | e. | information | c. | warning |
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73.
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red
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74.
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orange
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75.
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yellow
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76.
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blue
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77.
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green
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Match the activity with the appropriate eye gear. a. | welding | b. | minimum eye protection—good for most
activities | c. | working with chemicals, light, or possible flying
objects |
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78.
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glasses and goggles
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79.
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single-piece and cup goggles
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80.
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shaded lenses
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a. | Alternating Current | l. | Insulator | b. | Amps | m. | National Electric Code | c. | Breaker | n. | Receptacle | d. | Cable | o. | Parallel | e. | Circuit | p. | Resistance | f. | Conductor | q. | Series | g. | Direct
Current | r. | Underwriter’s
Laboratory | h. | Electricity | s. | Volts | i. | GFCI | t. | Watts | j. | Grounding
Conductor | u. | Service Entrance
Panel | k. | Hot/Black Wire | v. | Grounded/Neutral Conductor |
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81.
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The path followed by flowing electrons from the point where they leave the
electricity generating facility (source) until they return to it in a closed loop or path.
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82.
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Materials with loosely held electrons in the outer shell of the atom that allow
electrons to move freely in a controlled manner.
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83.
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The measure of electrical pressure used to force electrons through a circuit
along a conductor.
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84.
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The flow of electrons from one atom to another that can be used for heat, light
and power.
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85.
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Materials like rubber and glass that have tightly held electrons in their outer
shell and do not conduct electricity well.
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86.
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Measure of electrical current flow. When 6.28 quintillion electrons pass
any particular point in a circuit in one second. Also used to describe the amount of
“work” being done.
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87.
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Organization that tests electrical materials and devices to ensure a minimum
standard of safety.
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88.
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Provides technical information ensuring the practical safeguarding of persons
and property from hazards associated with the use of electricity.
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89.
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Current flow in one direction.
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90.
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Overcurrent protection device that protects the circuit from
overload.
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91.
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Current that changes direction 120 times per second on a 60 MHz cycle.
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92.
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Type of circuit in which power is run to each individual device without first
passing through any other device.
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93.
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The energy required to force electrons from one atom to another in a
conductor. Poor conductors or undersized conductors will overheat because they offer too much
of this.
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94.
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The rate at which electrical current is measured. Describes the amount of
light, heat or work that is done.
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95.
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Circuit in which electricity flows through each device on its way through the
circuit. If one fails, all fail.
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96.
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Overcurrent protection device that senses electrical imbalance on the line or
load side of the circuit and shuts the circuit down to protect persons from electrical shock.
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97.
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Two or more conductors grouped together in a single unit covered by a
protective sheath.
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98.
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Conductor that transmits electrical current to the earth to prevent a short
circuit.
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99.
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The ungrounded conductor that carries the current to the load.
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100.
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Device that allows plug in access to a circuit.
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101.
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Receives electrical power from the provider and serves as the source for branch
circuits and their protection.
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102.
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Conductor that carries the ampere imbalance between two ungrounded conductors.
Returns current to the power source under “0” pressure.
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Match the following flame cutting terms to their descriptions. a. | preheat | d. | gas pressure | b. | clearance | e. | correct cut | c. | speed |
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103.
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distance from torch tip to metal
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104.
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straight and square with smooth face
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105.
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too high will produce a dish shape near the top of the kerf
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106.
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too much makes incomplete cut with rough edges
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107.
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if too hot or too slow, the surface melts before the metal is heated
through
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a. | Volts | c. | Watts | b. | Amps | d. | Ohms |
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108.
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Electrical resistance
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109.
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The actual work completed (power)
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110.
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Electrical pressure (potential difference)
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111.
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The intensity or amount of electricity traveling (current)
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True/False
Indicate whether the
statement is true or false.
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112.
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Most injuries in the workplace occur when dysfunctional equipment causes an
accident that could not have been avoided.
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113.
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The higher the pressure a gas is used or stored at, the more stable it
is.
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114.
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If the preheat flame is too hot, the surface melts before the metal is heated
through.
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Short Answer
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115.
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How many amps of current would an electric motor use that is rated at 5 h.p and
uses 240 volts? (1 HP = 746 watts)
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116.
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How many amps of current would be required for a ceiling fan light fixture
consisting of 3 - 60 watt bulbs on a 120v circuit?
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117.
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How many amps would a 4,500 watt water heat pull on a 240v circuit?
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118.
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A central air conditioner in a typical American home operates on a 220-V circuit
and draws about 15 A of current. What would its wattage be?
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119.
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The UL panel on the bottom of an electric toaster oven indicates that it
operates at 1500 W on a 110 V circuit. How many amperes does the toaster draw?
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120.
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A watch battery is produces a voltage of 1.5 volts. How much power (watts)is
used by the watch if it draws 0.001 A?
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121.
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A radio control car uses 7.2 volts and 14 amps. How much power (watts) is used
by the car?
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122.
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A hair dyer says it generates 1400 watts. It is plugged into a wall outlet, 120
volts. What is the current (amperes) drawn by the hair dryer?
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123.
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On most homes, each circuit in a house can handle 15 amps at 120 volts. How many
watts is this?
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124.
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Will a 1400 watt hair dryer and four 75 watt light bulbs trip the breaker on the
15 amp 120 volt circuit?
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125.
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What is the current (amperage) drawn by car stereo that is connected to the
car's 12.0 volt battery, if the car stereo draws 40 watts?
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