Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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| 1. | When
arc welding, injury to the eyes can result from a. | chipping without eye protection | b. | viewing welding
without a helmet or shield | c. | welding with less than a No. 10 lens | d. | all of the
above | | |
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| 2. | The
appearance and strength of a bead are influenced by a. | amperage setting
on welder | c. | travel speed
when making the weld | b. | angle that the electrode is
held | d. | all of the
above | | | | |
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| 3. | Burning clothes on a human should be extinguished with a. | a fire
blanket | c. | sand | b. | a fire extinguisher | d. | water | | | | |
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| 4. | Water
in a welding area is useful for a. | receiving sparks from piercing | c. | cooling metal | b. | extinguishing
fires | d. | all of
these | | | | |
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| 5. | If
only one kind of electrode for all arc welding is to be purchased, the best choice is
an a. | E6010 | c. | E6013 | b. | E6011 | d. | E7018 | | | | |
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| 6. | For
most welding in agricultural mechanics the best electrode size is a. | 1/16
inch | c. | 3/16
inch | b. | 1/8
inch | d. | ¼
inch | | | | |
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| 7. | What
are the advantages of gold-coated filter lenses? a. | Allows the welder to see the work in gold colors and reflects
99.9 percent of the harmful rays and 99.9 percent of the heat. | b. | Allows the
welder to see the work in black and white and reflects 75.5 percent of the harmful rays and absorbs
50 percent of the heat. | c. | Allows the welder to see the work in natural colors and
reflects 99.9 percent of the harmful rays and 99.9 percent of the heat. | d. | Allows the
welder to see the work in natural colors and absorbs 99.9 percent of the harmful rays and 99.9
percent of the heat. | | |
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| 8. | At
what angle should the electrode be held to realize the greatest advantage of the electromagnetic
field surrounding the electrode?
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| 9. | When
working with metals, which would not be a method for identifying metals? a. | Magnetic
test | c. | Ductility | b. | Appearance | d. | Spark Test | | | | |
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| 10. | Electrodes are identified by classification systems established by a. | Society of
American Iron Workers | c. | American Welders
Association | b. | American Welding Society | d. | American Materials Society | | | | |
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| 11. | The
flux coating on the electrode provides a gas shield to a. | Protect the
molten metal | c. | Does not affect
the welding process | b. | By product of the electrode | d. | Prevents slag from forming | | | | |
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| 12. | When
welding with a direct current machine straight polarity, the electrode holder would
be a. | Positive | b. | Negative | c. | The current from
both directions | d. | The current flows from the electrode holder all the
time | | |
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| 13. | Which
of the following is not another name for Shielded Metal Arc
Welding? a. | SMAW | c. | Arc
Welding | b. | Stick welding | d. | GMAW | | | | |
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| 14. | The
output of an arc welding machine is commonly expressed in terms of a. | voltage | c. | wattage | b. | hertz | d. | amperage | | | | |
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| 15. | AC
welding machines house transformers to reduce input _______ and increase output _______ for safe and
effective welding. a. | amperage- wattage | c. | amperage – voltage | b. | voltage-
amperage | d. | voltage-
wattage | | | | |
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| 16. | The
AC/DC welding machine is essentially an AC welder with an electronic device to convert AC to DC
power. This electronic device is called a a. | amplifier | c. | rectifier | b. | justifier | d. | generator | | | | |
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| 17. | The __________ is an engine part that converts the up and down or linear motion
of the piston to circular motion. a. | camshaft | c. | crankshaft | b. | connecting
rod | d. | flywheel | | | | |
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| 18. | A
lean fuel mixture means that a. | the mixture has less air and more
fuel | b. | the mixture has
the correct amount of air, but too much fuel | c. | the mixture has
less fuel and more air | d. | the engine will operate more
efficiently | | |
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| 19. | The
spark plug gap of a plug that has been used should be gapped with a. | a flat feeler
gauge | c. | a
notecard | b. | a micrometer | d. | a wire feeler gauge | | | | |
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| 20. | Compression ratio is a. | the relationship between the volume of the cylinder plus
combustion chamber at the end of the compression stroke as compared to the volume
at the beginning of the compression stroke | b. | the relationship
between the volume of the cylinder plus combustion chamber at the beginning of the compression stroke
and the end of the compression stroke | c. | the relationship between the volume of the cylinder at the
beginning of the compression stroke and the end of the power stroke | d. | the relationship
between the volume of the combustion chamber and the cylinder | | |
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| 21. | Since
small engines burn a fuel mixture to generate the power to run the engine, the engine
is a. | an external
combustion engine | c. | an internal
compression engine | b. | an internal combustion engine | d. | an external compression engine | | | | |
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| 22. | __________ is the point at which the piston is farthest from the cylinder
head. a. | TDC | c. | MDC | b. | BDC | d. | Neither A, B, nor C | | | | |
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| 23. | A
_________ plate is a round disk that pivots on a shaft, regulating air and fuel flow inside a
carburetor. a. | choke | c. | vent | b. | throttle | d. | rod | | | | |
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| 24. | A(n)
__________ governor system is a system, which uses force from moving air produced by rotating
flywheel fins to sense engine speed. a. | flywheel | c. | rotating | b. | pneumatic | d. | force | | | | |
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| 25. | A
cylinder _________ test is a test that checks the sealing capability of compression components of a
small engine using compressed air. a. | leakdown | c. | leaking | b. | leakout | d. | neither A, B,
nor C | | | | |
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| 26. | On a
four stroke cycle engine, two revolutions of the crankshaft corresponds to _________ revolution(s) of
the camshaft.
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| 27. | The
most common method of increasing valve clearance on a small gasoline engine is to a. | grind the valve
face | c. | grind off the
end of the valve stem | b. | grind the valve tappet | d. | grind the valve seat | | | | |
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| 28. | An
internal combustion engine uses the process of rapid combustion to operate. The combustion
process requires what three things? a. | fuel-oxygen-heat | c. | fuel-compression-heat | b. | fuel-spark-carbon | d. | fuel-oxygen-air | | | | |
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| 29. | When
the piston is at its highest point (greatest distance from the crankshaft) it is said to be
at
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| 30. | At
the bottom of the intake stroke, the crankshaft moves across the bottom of its swing causing the
piston to move upward squeezing the air/fuel mixture against the head. This stroke is known as
the _______ stroke. a. | intake | c. | exhaust | b. | compression | d. | power | | | | |
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| 31. | On a
four-stroke cycle engine, the crankshaft makes ______ complete revolutions or turns during a
cycle.
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| 32. | Most
small engine foam type filters should be serviced after 25 hours of operation by washing. Which
of the following is not approved for safely washing the foam
filter? a. | gasoline | c. | detergent &
water | b. | varsol | d. | kerosene | | | | |
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| 33. | Which
of the following is not a recommended activity when servicing spark plugs on a small
engine? a. | soaking in
solvent | c. | scraping off
deposits with knife | b. | sandblasting | d. | re-gapping | | | | |
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| 34. | Type
NM cable a. | cannot be
installed in masonry block walls | b. | cannot be used as service entrance
cable | c. | cannot be used for exposed work in dry
locations | d. | cannot be used in multifamily
dwellings | | |
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| 35. | Multiwire branch circuit shall a. | supply only line to neutral loads | b. | have a
disconnect to open both “hots” at the same time when supplying a device or equipment on the
same yoke in a dwelling unit | c. | have its conductors originate from the same
panelboard | d. | all of the above | | |
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| 36. | GFCI
protection is required for all _________ ampere, 125 volt single-phase receptacles installed on
roofs. a. | 15 | c. | 15 and
20 | b. | 20 | d. | 30 ampere or
less | | | | |
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| 37. | The
minimum size branch circuit conductor is a. | No. 14 | c. | No. 10 | b. | No.
12 | d. | none of the
above | | | | |
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| 38. | Service conductors supplying one building shall not _____________ of another
building. a. | be installed on
the exterior walls | c. | both A and
B | b. | pass through the
interior | d. | none of the
above | | | | |
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| 39. | Ground rods cannot be less than __________ feet in length.
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| 40. | When
installing electrical cable in a wet location, which of these type cables is permitted for this type
installation? a. | Type NM
Romex | c. | Type
UF | b. | Type
AC | d. | Type
THHN | | | | |
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| 41. | When
installing electrical circuits, which of the following would not help reduce voltage
drop? a. | Decrease the
length of the circuit | c. | Decrease the
load of the circuit | b. | Increase the size of the
conductor | d. | Decrease the
voltage of the circuit | | | | |
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| 42. | The
smallest size copper conductor that should be used for a 30 amp circuit is a. | 14
AWG | c. | 10
AWG | b. | 12
AWG | d. | 8
AWG | | | | |
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| 43. | The
silver terminal on a receptacle is identified for the connection of the _________
conductor. a. | Ungrounded
| b. | Grounded | c. | Grounding | d. | Either the
Grounded or ungrounded | | |
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| 44. | White
wires used as a ungrounded conductor must be a. | Connected to black wires | c. | Stripped of all insulation | b. | Connected to
fixtures | d. | Taped or painted
black | | | | |
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| 45. | The line
from the power supplier’s transformer to your electric meter is known as the a. | service
drop | c. | metering
circuit | b. | distribution panel | d. | feeder circuit | | | | |
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| 46. | A
_______ functions by comparing the current in the “hot” wire with that of the
“neutral” and opening the circuit if these currents differ by 5/1000 amp or more, thus
shutting off the power and eliminating the shock hazard. a. | fuse | c. | breaker | b. | GFCI | d. | switch | | | | |
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| 47. | A
four-way switch is used with two ______ switches where lights are to be controlled from three
different locations. a. | four-way | c. | three-way | b. | one-way | d. | two-way | | | | |
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| 48. | Service lateral conductors must be installed a minimum of ______ feet below the ground
surface level.
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| 49. | If
using metallic device boxes, the NEC requires that the cable be secured within the box by an approved
_______ clamp or cable connector. a. | pigtail | c. | screw | b. | cable | d. | splice | | | | |
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| 50. | The
NEC requires that conductor insulation be color-coded. Which of the following conductor
insulation colors indicates the grounded conductor? a. | green | c. | white | b. | black | d. | red | | | | |
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