Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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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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2.
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What must be provided for a shop cleanup system to work well?
a. | fair assignment of every task to some person | b. | rotation of
assignments | c. | a genuinely honest record of performance | d. | none of the
above | e. | all of the above |
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3.
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A radial arm saw is used mostly for ____.
a. | crosscutting lumber | c. | cutting metal | b. | ripping lumber | d. | cutting
firewood |
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4.
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The jigsaw is designed for sawing
a. | curves | c. | blocks | b. | straight lines | d. | angles |
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5.
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When welding, the practice metal is called a
a. | shield | c. | leveler | b. | starter | d. | pad |
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6.
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Which of the following is the proper sequence of engine strokes?
a. | compression, power, intake, exhaust | c. | intake, compression, power,
exhaust | b. | power, compression, intake, exhaust | d. | exhaust, compression, intake,
power |
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7.
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Which of the following is NOT a proper safety precaution?
a. | Always wear eye protection. | b. | Work only in a well-ventilated
area. | c. | Never use anything but gasoline to wash parts. | d. | Use the proper tool
for the proper job. |
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8.
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An engine is a machine that converts a form of energy into __________________
force.
a. | chemical | c. | magnetic | b. | equipotential | d. | mechanical |
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9.
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Small engines are generally rated up to ____________ horsepower.
a. | 25 | c. | 30 | b. | 20 | d. | none of the
above |
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10.
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__________ is the point at which the piston is farthest from the cylinder
head.
a. | TDC | c. | BDC | b. | MDC | d. | none of the
above |
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11.
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The ______________ is the main structure of an engine which supports and
helps
maintain alignment of internal and external components
a. | engine block | c. | crankcase | b. | crankshaft | d. | connecting rod |
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12.
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The __________ of an engine is the linear distance that a piston travels in
the
cylinder bore from top dead center to bottom dead center
a. | bore length | c. | crankpin journal | b. | torque | d. | stroke |
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13.
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Piston rings are commonly made from __________.
a. | cast iron | c. | aluminum | b. | mild steel | d. | brass |
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14.
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Valve __________ is the period during engine operation when both intake
and
exhaust valves are open at the same time.
a. | reduction | c. | timing | b. | grinding | d. | overlap |
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15.
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The valve __________ is the machine surface of a valve that mates with the
valve
seat to seal the combustion chamber.
a. | seat | c. | overlap | b. | face | d. | stem |
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16.
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The crankcase __________ is an engine component that relieves
crankcase
pressure created by the reciprocating motion of the piston during engine
operation
a. | journal | c. | breather | b. | cover | d. | filter |
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17.
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A compound miter saw is used mostly for ____.
a. | crosscutting lumber | c. | ripping lumber | b. | cutting metal | d. | cutting
firewood |
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18.
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The jigsaw is designed for sawing
a. | curves | c. | straight lines | b. | blocks | d. | angles |
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19.
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When welding, the practice metal is called a
a. | shield | c. | starter | b. | leveler | d. | pad |
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20.
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Which of the following is the proper sequence of engine strokes?
a. | compression, power, intake, exhaust
| c. | power, compression, intake,
exhaust
| b. | intake, compression, power, exhaust
| d. | exhaust, compression, intake,
power
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21.
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Which of the following is NOT a proper safety precaution?
a. | Always wear eye protection
| c. | Always use gasoline to wash engine
parts
| b. | Work only in a well-ventilated area
| d. | Use the proper tool for the proper
job
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22.
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The component of a small engine which consists of the cylinder bore, cooling
fins on
air cooled engines, and valve train components.
a. | Engine Block | c. | Crankcase | b. | Cylinder Block | d. | Cylinder Bore |
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23.
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Which of the following would not be a function of the fly-wheel?
a. | Stabilizes crankshaft speed | c. | Acts as a fan on some air-cooled
engines | b. | Acts as a fan on some air-cooled engines | d. | Responsible for
timing |
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24.
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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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25.
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What is the temperature of the arc from a welder?
a. | 1000 degrees F | c. | 9000 degrees F | b. | 212 degrees F | d. | 5000 degrees F |
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26.
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Which of the following components would not be found in an engine that uses
diesel as
a fuel source?
a. | crankshaft | c. | spark plug | b. | intake valve | d. | compression
ring |
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27.
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Which of the following small engine components rotate in the same
direction?
a. | crankshaft and flywheel | c. | flywheel and
camshaft | b. | crankshaft and camshaft | d. | they all rotate in the same direction |
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28.
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Which of the following materials are small engine flywheels least likely to be
made
from?
a. | aluminum | c. | cast iron | b. | brass | d. | zinc |
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29.
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Which of the following gases would not be used as a shielding gas for GMAW
welding?
a. | argon | c. | helium | b. | carbon dioxide | d. | acetylene |
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30.
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Which of the following is not a factor when selecting GMAW machine
settings?
a. | thickness of metal to be welded | c. | wire electrode
diameter | b. | shielding gas | d. | ambient air temperature |
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31.
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GMAW welding machines produce constant _____ with different _____
levels,
depending on welding conditions.
a. | temperature, voltage | c. | current, temperature | b. | voltage, current | d. | current,
voltage |
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32.
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During the compression event in a four stroke engine _______________.
a. | both valves are open | c. | the intake valve is open and the exhaust valve is
closed | b. | both valves are closed | d. | the intake valve is closed and the exhaust valve is
open |
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33.
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__________ is the point at which the piston is closest to the cylinder
head.
a. | Top dead center | c. | Stroke | b. | Bottom dead center | d. | Crankpin |
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34.
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The engine component that slides back and forth due to forces produced during
the
combustion process acting as the movable end of the combustion chamber.
a. | crankshaft | c. | camshaft | b. | piston | d. | valve |
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35.
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In the GMAW welding process, the “consumable” electrode is in the
form of a:
a. | 12 inch electrode | c. | continuous wire | b. | 36 inch electrode | d. | tungsten
electrode |
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36.
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The proportion of time that a welder can operate without overheating is known as
its
________.
a. | AC/DC | c. | duty cycle | b. | AWS classification | d. | voltage drop |
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37.
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_____ is an arc welding process that produces an arc between a continuous
wire
electrode and the base metal, creating a weld pool in the presence of a shielding
gas.
This process is also sometimes known as MIG welding or wire welding.
a. | GMAW (Gas Metal Arc Welding) | c. | GTAW (Gas Tungsten Arc
Welding) | b. | SMAW (Shielded Metal Arc Welding) | d. | PAC (Plasma Arc
Cutting) |
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38.
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The width of cut produce by a cutting operation is called a
a. | kerf | c. | edge | b. | Curf | d. | Orifice |
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39.
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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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40.
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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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41.
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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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42.
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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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43.
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On a four stroke cycle engine, two revolutions of
the crankshaft corresponds to ________ revolution(s) of the camshaft
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44.
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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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45.
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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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46.
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On a four-stroke cycle engine, the crankshaft makes
______ complete revolutions or turns during a cycle.
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47.
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Which of the following items would not be
considered an essential safety item in a welding shop?
a. | fire blanket | c. | fire extinguisher | b. | duct tape | d. | welding curtain |
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48.
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Which of the following is recommended to be worn
under the welding helmet for safety protection of the eyes when accomplishing other tasks besides
welding?
a. | tinted contact lenses | c. | shade 10 safety glasses | b. | shade 5 safety
glasses | d. | clear safety
glasses |
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49.
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When servicing the small engine, the first step to
insure personal safety is to
a. | drain the fuel | c. | drain the oil | b. | clean the air filter | d. | remove the spark plug
wire |
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50.
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Valve stems are held in alignment by
a:
a. | valve spring | c. | valve guide | b. | valve sleeve | d. | cylinder block |
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51.
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The
is a hole in an engine block that
aligns and directs the piston during movement.
a. | Cylinder Bore | c. | Piston Bore | b. | Cylinder Block | d. | Crankshaft
throw |
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52.
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A(n)
is
an integral thin cast strip designed to provide efficient air circulation and dissipation of heat
away from the engine cylinder block into the air stream.
a. | Oil sump | c. | Flywheel | b. | Piston Rings | d. | Cooling Fin(s) |
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53.
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The GMAW Gas Metal Arc Welding process has also been referred to as
a. | stick welding | c. | flame welding | b. | slagless welding | d. | MIG welding |
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54.
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Shielding gases used in GMAW welding include inert, reactive and gas mixtures
of:
a. | oxygen, carbon dioxide, helium and nitrogen | c. | helium, nitrogen, oxygen and
acetylene | b. | argon, helium, carbon dioxide, and oxygen | d. | argon, acetylene, oxygen and
helium |
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55.
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The welding process that uses and automatic wire feed is:
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56.
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The
is
a mechanical device which reduces the high pressure of the gases as they flow from their respective
cylinder down to a lower constant working pressure.
a. | pressure gauge | c. | flowmeter | b. | tank gauge | d. | regulator |
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57.
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When the exhaust valve is closed and the intake valve is closed the engine is on
the __________ stroke.
a. | intake | c. | power | b. | compression | d. | exhaust |
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58.
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Which of the following is not a necessary component
of a GMAW welding machine?
a. | Spool of electrode wire | c. | Ground
Clamp | b. | Electrode holder | d. | Welding Gun |
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59.
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An engine is a machine that converts a form of
energy into __________________ force.
a. | chemical | c. | equipotential | b. | magnetic | d. | mechanical |
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60.
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__________ is a force acting on a perpendicular radial distance from a point of
rotation. It is equal to force times distance.
a. | Watt | c. | Pressure | b. | Horsepower | d. | Torque |
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61.
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The __________ acts as the movable end of the combustion chamber and must
withstand pressure fluctuations, thermal stress, and mechanical load.
a. | valve | c. | piston | b. | crankshaft | d. | camshaft |
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62.
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The most common fuel used in small engines is:
a. | gasoline | c. | propane | b. | diesel | d. | alcohol |
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63.
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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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64.
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Why is it important to store projects properly?
a. | so they do not interfere with the work of others | b. | so they are not
damaged by others using the shop | c. | so they can be evaluated by the
foreperson | d. | A and B |
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65.
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What must be provided for a shop cleanup system to work well?
a. | fair assignment of every task to some person | b. | rotation of
assignments | c. | a genuinely honest record of performance | d. | none of the
above | e. | all of the above |
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66.
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When squaring corners, a right triangle has a ____ degree angle.
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67.
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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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68.
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Wood from deciduous trees is classified as
a. | softwood | c. | green wood | b. | hardwood | d. | strong wood |
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69.
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Which of the following is NOT a proper safety precaution?
a. | Always wear eye protection. | b. | Work only in a well-ventilated
area. | c. | Never use anything but gasoline to wash parts. | d. | Use the proper tool
for the proper job. |
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70.
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Which tool is used for smoothing, shaping, and polishing metal?
a. | Sander | b. | Router | c. | Drill | d. | Grinder |
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71.
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Which tool uses blades to shape the surfaces and edges of woodstock?
a. | Sander | b. | Router | c. | Drill | d. | Grinder |
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72.
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Which tool is used for smoothing and shaping wood?
a. | Sander | b. | Router | c. | Drill | d. | Grinder |
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73.
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Which type of saw has thin blades that move back and forth to make a cut?
a. | Circular saw | b. | Miter saw | c. | Jigsaw/reciprocating
saw | d. | Table saw |
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74.
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What part of a portable power drill clamps and holds the bit in place?
a. | Chuck | b. | Drill motor | c. | Bit
clamp | d. | Screw lug |
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True/False
Indicate whether the
statement is true or false.
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75.
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The more narrow the blade on a band saw, the shorter the curve that is
cut.
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76.
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Before striking an arc, it is important to be sure that the metal is clean and
free of oil, grease, or rust.
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77.
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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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78.
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The narrower the blade on a band saw, the shorter the curve it can cut.
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79.
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The primary function of the planer is to smooth the face of a board.
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80.
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Both four-cycle and two-cycle engines need oil added to keep them working
properly.
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81.
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Never leave power equipment running while unattended.
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82.
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Pay attention to what you are doing at all times.
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83.
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Running in the laboratory is necessary to save time.
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84.
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Power equipment should be turned off immediately after use.
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85.
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Safety check power equipment each time before using.
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86.
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Carelessness or horseplay will not be allowed in the shop.
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87.
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Do not place tools and materials in walkways.
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88.
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Become familiar with controls before using power equipment.
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89.
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Loud talking and shouting are acceptable in the mechanics laboratory.
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90.
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No student should leave the laboratory without teacher permission.
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91.
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Most injuries in the workplace are a result of dysfunctional equipment and could
not have been avoided.
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92.
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If you always take the proper safety precautions, insurance is not
needed.
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93.
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Both the four-cycle and two-cycle engines need oil added to keep them working
properly.
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94.
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When an engine malfunctions, it is usually only a part of one system that
malfunctions.
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95.
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It is safe practice to use tools for jobs other than those for which they were
intended.
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96.
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A speed square is a triangular tool used to determine angles and checking
materials and projects for squareness.
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97.
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Using the wrong hammer for a job may damage your materials, damage the hammer,
or cause injury.
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98.
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Using the wrong screwdriver can severely damage a screw.
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99.
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All hand saws have the same cutting action.
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100.
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A Phillips-head screwdriver has a flat head.
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101.
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It is safe practice to use a soft-headed hammer to hit a wrench and turn a
fastener.
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102.
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It is safer to use a sharp blade than a dull one (for any cutting tool) and the
job will go much smoother.
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Short Answer
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103.
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Failure to maintain an engine can lead to several things. Name at least two?
*
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104.
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What engine system is the sparkplug in?
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105.
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What engine system is the air filter in?
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106.
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What engine system is the carburetor in?
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107.
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What engine system is the muffler in?
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108.
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What engine system is the oil in?
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109.
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List 3 safety items to wear while welding.
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110.
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A carburetor’s main purpose is to mix ____________ and ___________ in
order for
an engine to run.
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111.
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What does TDC stand for?
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112.
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Gases that have been burnt and expelled from the engine are called
what?
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113.
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What is the name of the part of the engine that is located within the cylinder
wall?
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114.
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What features are essential for both efficient and safe work areas in the
shop?
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Matching
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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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115.
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red
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116.
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orange
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117.
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yellow
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118.
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blue
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119.
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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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120.
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glasses and goggles
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121.
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single-piece and cup goggles
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122.
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shaded lenses
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Match the following engine terms with their definitions. a. | piston | c. | stroke | b. | crankshaft | d. | cam |
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123.
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device which converts circular motion to linear motion
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124.
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raised area on a shaft
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125.
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cylindrical device within the cylinder
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126.
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movement of piston from top to bottom or bottom to top
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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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127.
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glasses and goggles
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128.
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single-piece and cup goggles
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129.
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shaded lenses
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Match the following terms for power machines with the
definitions. a. | power machine | d. | miter gauge | b. | band
saw | e. | rip
fence | c. | stationary |
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130.
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tool driven by electric motor
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131.
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fixed position
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132.
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power tool with saw teeth
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133.
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a device that guides stock into saw at an angle
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134.
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guide that keeps work in a straight line with the saw
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Match the following engine terms with their definitions. a. | piston | c. | stroke | b. | crankshaft | d. | cam |
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135.
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device which converts circular motion to linear motion
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136.
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raised area on a shaft
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137.
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cylindrical device within the cylinder
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138.
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movement of piston from top to bottom or bottom to top
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