WorksheetsSmall Engines B(26-50)
Total questions: 25
Worksheet time: 13mins
Name
Class
Date
1.
The blade of a push mower is attached to the ____________ journal of the crankshaft.
a. pto
c. tapered
b. stem
d. crankpin
a. pto
c. tapered
b. stem
d. crankpin
a)
a
b)
b
c)
c
d)
d
2.
The connecting rod is attached to the ____________ journal of the crankshaft.
a. tapered
c. magneto
b. flywheel
d. crankpin
a. tapered
c. magneto
b. flywheel
d. crankpin
a)
a
b)
b
c)
c
d)
d
3.
Crankshaft journals are measured with a:
a. voltmeter
c. micrometer
b. feeler gauge
d. telescoping gauge
a. voltmeter
c. micrometer
b. feeler gauge
d. telescoping gauge
a)
a
b)
b
c)
c
d)
d
4.
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.
c. There is only a specification for the crankpin journal.
b. There are not any specifications for any of the journals.
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.
c. There is only a specification for the crankpin journal.
b. There are not any specifications for any of the journals.
d. Crankshaft journals can wear out but a visual check is all that is recommended
a)
a
b)
b
c)
c
d)
d
5.
Which of the following statements is not true?
a. The connecting rod has a small end and a big end.
c. The connecting rod screws have fine threads.
b. The small end of the connecting rod attaches to the crankshaft.
d. The samll end of the connecting rod attaches to the piston pin
a. The connecting rod has a small end and a big end.
c. The connecting rod screws have fine threads.
b. The small end of the connecting rod attaches to the crankshaft.
d. The samll end of the connecting rod attaches to the piston pin
a)
a
b)
b
c)
c
d)
d
6.
The movement along the axis of a crankshaft on a small engine is called:
a. end play
c. throw
b. radial force
d. stroke
a. end play
c. throw
b. radial force
d. stroke
a)
a
b)
b
c)
c
d)
d
7.
The device used to measure the end play of a crankshaft is a:
a. micrometer
c. dial indicator
b. voltmeter
d. stator
a. micrometer
c. dial indicator
b. voltmeter
d. stator
a)
a
b)
b
c)
c
d)
d
8.
How do you get more end play on a crankshaft?
a. use a thinner oil pan gasket
c. torque the oil pan bolts
b. use a thicker oil pan gasket
d. buy a different crankshaft
a. use a thinner oil pan gasket
c. torque the oil pan bolts
b. use a thicker oil pan gasket
d. buy a different crankshaft
a)
a
b)
b
c)
c
d)
d
9.
The bearings that support the crankshaft are called:
a. crankshaft main bearings
c. crankpin bearings
b. crankshaft thrust bearings
d. crankshaft side bearings
a. crankshaft main bearings
c. crankpin bearings
b. crankshaft thrust bearings
d. crankshaft side bearings
a)
a
b)
b
c)
c
d)
d
10.
____________ is the space between the inner bearing surface and the crankpin journal of the crankshaft.
a. Bearing clearance
c. Crankpin clearance
b. Crankshaft clearance
d. Journal clearance
a. Bearing clearance
c. Crankpin clearance
b. Crankshaft clearance
d. Journal clearance
a)
a
b)
b
c)
c
d)
d
11.
A ____________ is used to measure the clearance between the inner bearing surface and the crankpin journal of the crankshaft.
a. caliper
c. plastigage
b. crankpin gauge
d. micrometer
a. caliper
c. plastigage
b. crankpin gauge
d. micrometer
a)
a
b)
b
c)
c
d)
d
12.
A crankcase __________ prevents leakage of oil from the area where the crankshaft and crankcase come together.
a. gasket
c. lubricant
b. washer
d. seal
a. gasket
c. lubricant
b. washer
d. seal
a)
a
b)
b
c)
c
d)
d
13.
Seals can be made of:
a. neoprene
c. graphite
b. leather
d. any of the above
a. neoprene
c. graphite
b. leather
d. any of the above
a)
a
b)
b
c)
c
d)
d
14.
A typical crankcase seal has a __________ outer shell with a __________ center.
a. steel, neoprene
c. steel, plastic
b. neoprene, steel
d. plastic, steel
a. steel, neoprene
c. steel, plastic
b. neoprene, steel
d. plastic, steel
a)
a
b)
b
c)
c
d)
d
15.
A typical crankcase seal has a small __________ that keeps the sealing lip in constant contact with the shaft that it seals.
a. round plunger
c. rubber shaft
b. coil spring
d. rubber sea
a. round plunger
c. rubber shaft
b. coil spring
d. rubber sea
a)
a
b)
b
c)
c
d)
d
16.
Which of the followng statements is true concerning a crankcase seal?
a. The sealing lip must face toward the fluid that is being sealed in.
c. both a and b
b. The sealing lip must face the crankcase.
d. neither a nor b
a. The sealing lip must face toward the fluid that is being sealed in.
c. both a and b
b. The sealing lip must face the crankcase.
d. neither a nor b
a)
a
b)
b
c)
c
d)
d
17.
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
c. WD-40
b. a rag
d. tape
a. plastic
c. WD-40
b. a rag
d. tape
a)
a
b)
b
c)
c
d)
d
18.
Before installing a new crankcase seal, it is recommended to apply ____________ to the outside of the shell of the seal.
a. WD-40
c. oil
b. a liquid sealant
d. grinding compound
a. WD-40
c. oil
b. a liquid sealant
d. grinding compound
a)
a
b)
b
c)
c
d)
d
19.
The purpose of the flywheel key is to:
a. provide a hotter spark.
c. give the engine a better rotation.
b. hold the flywheel in an exact position.
d. make the engine spin faster
a. provide a hotter spark.
c. give the engine a better rotation.
b. hold the flywheel in an exact position.
d. make the engine spin faster
a)
a
b)
b
c)
c
d)
d
20.
The flywheel key is made of:
a. steel
c. brass
b. aluminum
d. iron
a. steel
c. brass
b. aluminum
d. iron
a)
a
b)
b
c)
c
d)
d
21.
Why is the flywheel key made of aluminum?
a. to cut down on cost
c. because aluminum is not as conductive as steel
b. aluminum is more durable than steel
d. so it will shear if the blade hits something hard
a. to cut down on cost
c. because aluminum is not as conductive as steel
b. aluminum is more durable than steel
d. so it will shear if the blade hits something hard
a)
a
b)
b
c)
c
d)
d
22.
The flywheel key should be inspected to see if it is:
a. discolored
c. magnetic
b. swollen
d. partly sheared
a. discolored
c. magnetic
b. swollen
d. partly sheared
a)
a
b)
b
c)
c
d)
d
23.
If the flywheel key is partly sheared then the engine will be:
a. out of balance
c. out of time
b. low on compression
d. still in good shape
a. out of balance
c. out of time
b. low on compression
d. still in good shape
a)
a
b)
b
c)
c
d)
d
24.
During the non-power strokes, the inertia of the flywheel keeps the:
a. crankshaft spinning
c. both a and b
b. engine operation smooth
d. neither a nor b
a. crankshaft spinning
c. both a and b
b. engine operation smooth
d. neither a nor b
a)
a
b)
b
c)
c
d)
d
25.
Magnets cast into the flywheel produce:
a. electrical current for the battery
c. electrical current for the lights
b. electrical current for the ignition system
d. electrical current for the computer
a. electrical current for the battery
c. electrical current for the lights
b. electrical current for the ignition system
d. electrical current for the computer
a)
a
b)
b
c)
c
d)
d
100 %
