Test Bank B CDE Small Engines Flashcards
Which of the following would not be found in the crankcase?
a. oil
b. breather
c. camshaft
d. connecting rod
B: Breather
- Which of the following would not be found in the crankcase?
a. oil slinger
b. connecting rod cap
c. emulsion tube
d. tappets
C: Emulsion tube
Which of the following would not be found in the crankcase?
a. welch plug
b. crankpin journal
c. mechanical governor lever
d. flyweights
A: welch plug
The camshaft opens and closes the:
a. intake valve
b. exhaust valve
c. reed valve
d. both a and b
D: Both A and B
__________ are off-center enlargements on the camshaft that converts rotary motion to reciprocating motion.
a. flyweights
b. lifters
c. lobes
d. gears
C: Lobes
The camshaft has _____ lobes.
a. 2
b. 3
c. 4
d. 5
A: 2
On most small engines the lobes of the camshaft are located directly under the __________.
a. piston c. valves
b. crankshaft
c. valves
d. tappets
D: Tappets
On some engine designs, the camshaft can be located in the cylinder head above the __________.
a. valves
b. tappets
c. carburetor
d. governor
A: Valves
Camshafts are made of:
a. steel
b. cast iron
c. both a and b
d. neither a nor b
C: Both A and B
The surface of the camshaft is ____________ to improve wear-ability.
a. hardened
b. painted
c. enlarged
d. treated
A: Hardened
To make hand cranking easier, some small engines have an automatic ____________ mechanism on the
camshaft.
a. governor control
b. oil slinger
c. compression release
d. power release
C: Compression release
The automatic compression release mechanism on the camshaft lifts the ________ valve slightly during
cranking and releases part of the compression pressure.
a. intake
b. exhaust
c. reed valve
d. both a and b
B: Exhaust
Which of the following is a part of some automatic compression release mechanisms that are installed on
some small engines?
a. a bolt and a nut
b. a washer
c. two # 10 fine threaded screws
d. flyweights
D: Flyweights
Which of the following is a part of some automatic compression release mechanisms that are installed on
some small engines?
a. a tab
b. a spring
c. linkage
d. both a and b
D: Both A and B
Automatic compression release mechanisms are only engaged until the engine reaches approximately
________ rpm’s.
a. 100
b. 600
c. 1,000
d. 2,500
B: 600
The camshaft is driven by a __________ on the crankshaft.
a. lobe
b. gear
c. spring
d. flywheel
B: Gear
The camshaft gear and crankshaft gear has ____________ that must be aligned in order for the valves to open
and close at the right time.
a. lobes
b. a keyway
c. teeth
d. timing mark
D: Timing Mark
The camshaft gear is ________ as large as the crankshaft gear.
a. 4 times
b. 3 times
c. 2.5 times
d. 2 times
D: 2 times
How many revolutions does a camshaft make to one revolution of the crankshaft?
a. 1/2
b. 1
c. 1 1/2
d. 2
A: 1/2
How many revolutions does a crankshaft make to each power stroke of the engine?
a. 1
b. 2
c. 3
d. 4
B: 2
Counterweights are designed into the crankshaft to provide:
a. more power
b. increased engine speed
c. engine balancing
d. better ignition
C: engine balancing
The tapered end of the crankshaft has a __________.
a. hollow inside
b. needlepoint
c. keyway
d. magnet
C: Keyway
The crankshaft has three ____________.
a. moving parts
b. threaded parts
c. heads
d. journals
D: Journals
The three crankshaft journals are called:
a. flywheel, crankpin, and pto
b. tapered, round, and cylindrical
c. magneto, crankpin, and pto
d. magneto, crankpin, and stem
C: magneto, crankpin, and PTO
The flywheel is attached to the ____________ journal of the crankshaft.
a. pto
b. flywheel
c. magneto
d. crankpin
C: Magneto
The blade of a push mower is attached to the ____________ journal of the crankshaft.
a. PTO
b. stem
c. tapered
d. crankpin
A: PTO
The connecting rod is attached to the ____________ journal of the crankshaft.
a. tapered
b. flywheel
c. magneto
d. crankpin
D: Crankpin
Crankshaft journals are measured with a:
a. voltmeter
b. feeler gauge
c. micrometer
d. telescoping gauge
C: micrometer
Which of the following statements is true concerning crankshaft journals?
a. All three crankshaft journals must be
measured and checked with the
specifications in the repair manual to see
if they are worn.
b. There are not any specifications for any of
the journals.
c. There is only a specification for the
crankpin journal.
d. Crankshaft journals can wear out but a
visual check is all that is recommended.
A: All three crankshaft journals must be
measured and checked with the
specifications in the repair manual to see
if they are worn.
Which of the following statements is not true?
a. The connecting rod has a small end and a
big end.
b. The small end of the connecting rod
attaches to the crankshaft.
c. The connecting rod screws have fine
threads.
d. The small end of the connecting rod
attaches to the piston pin.
B: The small end of the connecting rod
attaches to the crankshaft.
The movement along the axis of a crankshaft on a small engine is called:
a. end play
b. radial force
c. throw
d. stroke
A: End play
The device used to measure the end play of a crankshaft is a:
a. micrometer
b. voltmeter
c. dial indicator
d. stator
C: dial indicator
How do you get more end play on a crankshaft?
a. use a thinner oil pan gasket
b. use a thicker oil pan gasket
c. torque the oil pan bolts
d. buy a different crankshaft
B: use a thicker oil pan gasket
The bearings that support the crankshaft are called:
a. crankshaft main bearings
b. crankshaft thrust bearings
c. crankpin bearings
d. crankshaft side bearings
A: Crankshaft main bearings
____________ is the space between the inner bearing surface and the crankpin journal of the crankshaft.
a. Bearing clearance
b. Crankshaft clearance
c. Crankpin clearance
d. Journal clearance
A: Bearing clearance
A ____________ is used to measure the clearance between the inner bearing surface and the crankpin journal of the crankshaft.
a. caliper
b. crankpin gauge
c. plastigage
d. micrometer
C: plastigage
A crankcase __________ prevents leakage of oil from the area where the crankshaft and crankcase come
together.
a. gasket
b. washer
c. lubricant
d. seal
D: Seal
Seals can be made of:
a. neoprene
b. leather
c. graphite
d. any of the above
D: Any of the above
A typical crankcase seal has a __________ outer shell with a __________ center.
a. steel, neoprene
b. neoprene, steel
c. steel, plastic
d. plastic, steel
A: steel, neoprene
A typical crankcase seal has a small __________ that keeps the sealing lip in constant contact with the shaft
that it seals.
a. round plunger
b. coil spring
c. rubber shaft
d. rubber seal
B: Coil spring
Which of the following statements is true concerning a crankcase seal?
a. The sealing lip must face toward the fluid
that is being sealed in.
b. The sealing lip must face the crankcase.
c. both a and b
d. neither a nor b
C: both a and b
When removing the crankcase cover from the crankshaft, it is recommended to put ________ over the keyway to keep the sharp keyway edges from cutting the oil seal.
a. plastic
b. a rag
c. WD-40
d. tape
D: Tape
Before installing a new crankcase seal, it is recommended to apply ____________ to the outside of the shell
of the seal.
a. WD-40
b. a liquid sealant
c. oil
d. grinding compound
B: a liquid sealant
The purpose of the flywheel key is to:
a. provide a hotter spark.
b. hold the flywheel in an exact position.
c. give the engine a better rotation.
d. make the engine spin faster.
B: hold the flywheel in an exact position.
The flywheel key is made of:
a. steel
b. aluminum
c. brass
d. iron
B: Aluminum
Why is the flywheel key made of aluminum?
a. to cut down on cost
b. aluminum is more durable than steel
c. because aluminum is not as conductive as steel
d. so it will shear if the blade hits something hard
D: so it will shear if the blade hits something hard
The flywheel key should be inspected to see if it is:
a. discolored
b. swollen
c. magnetic
d. partly sheared
D: partly sheared
If the flywheel key is partly sheared then the engine will be:
a. out of balance
b. low on compression
c. out of time
d. still in good shape
C: out of time
During the non-power strokes, the inertia of the flywheel keeps the:
a. crankshaft spinning
b. engine operation smooth
c. both a and b
d. neither a nor b
C: both a and b
Magnets cast into the flywheel produce:
a. electrical current for the battery
b. electrical current for the ignition system
c. electrical current for the lights
d. electrical current for the computer
B: electrical current for the ignition system
. Which of the following is the purpose of the fins on a flywheel?
a. helps keep the engine cool
b. helps to balance the flywheel rotation
c. makes the engine look better
d. provides a more efficient ignition system
A: helps keep the engine cool
The flywheel is fastened to the ____________.
a. engine block
b. connecting rod
c. camshaft
d. crankshaft
D: Crankshaft
Which of the following can be used to remove a flywheel?
a. a knock-off tool
b. a flywheel puller
c. both a and b
d. neither a nor b
C: both a and b
When the flywheel is removed it should be:
a. cleaned right away
b. inspected
c. replaced
d. nothing should be done
B: Inspected
When a flywheel is inspected, it should be inspected for:
a. cracks
b. discoloration
c. spark
d. all of the above
A: cracks
When a flywheel is inspected, it should be inspected for:
a. compression
b. magnetism
c. elasticity
d. all of the above
B: Magnetism
When a flywheel is inspected, it should be inspected for:
a. mounting hole damage
b. keyway damage
c. both a and b
d. neither a nor b
C: both a and b
Which of the following is a recommended way to check the strength of the flywheel magnet?
a. Place a socket on the magnet and shake the flywheel to see if the socket remains on the magnet.
b. Remove the flywheel key and spin the flywheel freely on the crankshaft to see if it spins fast enough.
c. Hit it with a hammer and listen to the sound of it.
d. There is no way to check the strength of the flywheel magnet.
A: Place a socket on the magnet and shake the flywheel to see if the socket remains on the magnet.
____________ is the heart of the magneto system.
a. The spark plug
b. Magnetism
c. The breaker points
d. The coil
B: Magnetism
The only moving parts in a solid state ignition system is the:
a. breaker points arm
b. spark plug electrode
c. permanent magnets
d. connecting rod
C: permanent magnets
A measure of how much force is devoted toward twisting or turning is called:
a. binding
b. resistance
c. torque
d. radial force
C: torque
The formula for torque is:
a. Force - Lever-Arm Length
b. Force / Lever-Arm Length
c. Force X Lever-Arm Length
d. Force + Lever-Arm Length
C: Force X Lever-Arm Length
An engine specification of 144-inch pounds would be converted to:
a. 12-foot lbs.
b. 24-foot lbs.
c. 36-foot lbs.
d. 1,728-foot lbs.
A: 12-foot lbs.
Which of the following statements is true?
a. Cylinder head bolts do not have to be
torqued.
b. It is recommended that you use a new
head gasket when reinstalling the cylinder
head.
c. When tightening the cylinder head
bolts, start in the upper left corner and
proceed clockwise.
d. Gasket cement or sealer can be used as a
head gasket.
B: It is recommended that you use a new
head gasket when reinstalling the cylinder
head.
Which of the following cannot be replaced without replacing the bigger part that it is attached to?
a. valve seat inserts
b. valve face
c. oil seals
d. piston rings
B: Valve face
Which of the following cannot be replaced without replacing the bigger part that it is attached to?
a. welch plug
b. gaskets
c. primer bulb
d. valve head
D: Valve head
Where is the greatest amount of wear in a cylinder?
a. top of the cylinder
b. middle of the cylinder
c. bottom of the cylinder
d. cylinders wear evenly from top to bottom
A: top of the cylinder
Where is the least amount of wear in a cylinder?
a. top of the cylinder
b. middle of the cylinder
c. bottom of the cylinder
d. cylinders wear evenly from top to bottom
C: bottom of the cylinder
Cylinders wear more at the top because of:
a. the dust and grit brought in with the air-fuel charge
b. the wearing action of burning gases
c. the lack of lubrication in the upper part of
the cylinder
d. all of the above
D: all of the above
When checking for cylinder taper, the measurements should be obtained:
a. at the very top and at the very bottom
b. at the very top and in the middle
c. just below the ring ridge and just below
the ring travel
d. it doesn’t matter
C: just below the ring ridge and just below
the ring travel
Although it can vary because of engine design and from manufacturer to manufacturer, as a rule of thumb, if the taper in a cylinder becomes greater than ________ ring tension on the cylinder walls is lost.
a. .001”
b. .005”
c. .010”
d. .020”
C: .010”
Which of the following can be a result of the taper of a cylinder becoming so great that ring tension is lost?
a. burning large amounts of oil
b. loss of engine balance
c. warped valves
d. governor malfunction
A: burning large amounts of oil
Which of the following can be a result of the taper of a cylinder becoming so great that ring tension is lost?
a. cracked cylinder head
b. piston slap
c. burned valve
d. blown head gasket
B: piston slap
Which of the following can be a result of the taper of a cylinder becoming so great that ring tension is lost?
a. sheared flywheel key
b. flooded engine
c. ring wear and damage
d. stopped up carburetor
C: ring wear and damage
Once the taper of a cylinder becomes too great, it can be corrected by:
a. buying a new piston
b. boring the cylinder oversize
c. honing the cylinder
d. it cannot be corrected
B: boring the cylinder oversize
Reconditioning a cylinder would involve which of the following?
a. inspection and measurement
b. honing
c. both a and b
d. neither a nor b
C: both a and b
Reconditioning a cylinder would involve which of the following?
a. inspection and measurement
b. reboring
c. both a and b
d. neither a nor b
C: both a and b
If light scratches are to be removed from a cylinder, a ____________ should be used.
a. ridge reamer
b. hone
c. boring machine
d. sander
B: Hone
Cylinder hones are used with a:
a. portable electric drill
b. drill press
c. both a and b
d. neither a nor b
C: both a and b
The finish on a reconditioned cylinder should have a:
a. 45-degree crosshatch appearance
b. slick finish
c. very rough finish
d. finish showing lines going up and down
A: 45-degree crosshatch appearance
After reconditioning a cylinder, it should be washed in:
a. a commercial parts cleaning solvent and then with soap and hot water
b. a commercial part cleaning solvent only
c. soap and hot water only
d. soap and cold water
A: a commercial parts cleaning solvent and then with soap and hot water
A cylinder must be measured for:
a. wear
b. out-of-roundness
c. both a and b
d. neither a nor b
C: both a and b
Which of the following can be used to measure the cylinder diameter?
a. wire gauge
b. cylinder tester
c. feeler gauge
d. telescoping gauge and outside micrometer
D: telescoping gauge and outside micrometer
Which of the following can be used to measure the cylinder diameter?
a. outside micrometer
b. inside micrometer
c. cylinder meter
d. round gauge
B: inside micrometer
How many measurements should be taken in a cylinder when checking for normal wear?
a. 2
b. 4
c. 6
d. 8
C: 6
Worn cylinders will have a narrow, unworn portion at the very top called a:
a. ridge
b. cap
c. land
d. taper
A: Ridge
What causes cylinders to have a narrow, unworn portion at the very top?
a. the top of the cylinder being made out of a
different type of metal
b. the top piston ring not reaching all the way
to the top
c. less heat at the top
d. the top of the cylinder having the
capability to expand and contract
B: the top piston ring not reaching all the way
to the top
What is the correct name of the tool that is used to remove the narrow, unworn portion at the top of the cylinder?
a. cylinder hone
b. lapping tool
c. cylinder cutting tool
d. ridge reamer
D: ridge reamer
On Briggs & Stratton engines it is recommended that cylinders be resized when the bore is more than ________ oversize.
a. .001”
b. .003”
c. .006”
d. .009”
B: .003”
On Briggs & Stratton engines it is recommended that aluminum cylinders be resized when the bore is more than ________ out of round.
a. .003”
b. .006”
c. .009”
d. .010”
A: .003”
According to the Briggs & Stratton repair manual, if the cylinder has to be resized, always resize it to exactly ________, ________, or ________ over the standard bore size so that the stock oversize piston and rings will fit correctly.
a. .001”, .002”, .003”
b. .002”, .003”, .004”
c. .010”, .020”, .030”
d. .020”, .030”, .040”
C: .010”, .020”, .030”
Which of the following is responsible for keeping all engine parts in alignment?
a. connecting rod
b. flywheel
c. cylinder block
d. crankshaft
C: cylinder block
Which part of the cylinder block helps to cool the engine?
a. flywheel
b. metal fins
c. oil
d. cylinder head
B: metal fins
Which of the following is part of the cylinder block?
a. valve face
b. cylinder
c. cylinder head
d. gas tank
B: cylinder
Cylinder blocks can be made of:
a. aluminum
b. cast iron
c. both a and b
d. neither a nor b
B: cast iron
Aluminum cylinder blocks have a/an ________ sleeve inside the cylinder.
a. tapered
b. aluminum
c. cast iron
d. steel
D: Steel
An advantage of aluminum cylinder blocks over cast iron is:
a. they have a better air-to-fuel ratio
b. they have a better compression ratio
c. they are heavier
d. they are lighter weight
D: they are lighter weight
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