2.3 Exercises for Unit 2

1. The cylinder block, the cylinder head, the exhaust and intake manifolds are considered to be what part of the engine?

A. Rotational
B. Stationary
C. Frame
D. Backbone

2. Other than cast iron, what other type of metal is used to construct an engine block?

A. Aluminum
B. Tin
C. Plastic
D. Copper

3. Core hole plugs are also called _____ plugs.

A. hot
B. wet
C. cold
D. freeze

4. What are the two types of cylinder sleeves used in an engine block?

A. Wet and dry
B. Cold and hot
C. Wet and hot
D. Dry and cold

5. What condition causes most cylinder sleeve casualties?

A. Lack of maintenance
B. Lack of use
C. Too much use
D. Too much maintenance

6. The piston attaches to the crankshaft by what means?

A. Push rod
B. Connecting rod
C. Wrist pin
D. Rocker arm

7. What part is the backbone of an internal combustion engine?

A. Camshaft
B. Engine block
C. Crankshaft
D. Piston

8. In a diesel engine, what is machined in the head of the piston?

A. Compression chamber
B. Combustion cup
C. Dome
D. Power cup

9. What type of bearings support the crankshaft in the block?

A. Connecting
B. Main
C. Rod
D. Torsion

10. Intake manifolds can change engine performance when they are made by varying the length of what?

A. Bolts
B. Passages
C. Orifaces
D. Tubs

11. Cylinder heads on air-cooled engines are made of what material?

A. Argon
B. Cast iron
C. Tin
D. Aluminum

12. An internal combustion engine has a minimum of how many valves for each cylinder?

A. Four
B. Three
C. Two
D. One

13. What type of lifter is a zero clearance lifter?

A. Roller
B. Hydraulic
C. Mechanical
D. Floating

14. The three characteristics to check on a valve spring are the squareness, height and _____.

A. torsion
B. elasticity
C. color
D. tension

15. Timing gears are used in which type of engine?

A. Overhead cam
B. Cam-in-block
C. Dual overhead cam
D. All of the above

16. Typical clearance for mechanical lifters is_____

A. 0.014 Intake and 0.014 Exhaust
B. 0.014 Intake and 0.016 Exhaust
C. 0.016 Intake and 0.014 Exhaust
D. 0.016 Intake and 0.016 Exhaust

17. (True or False) Hydraulically operated valves can be adjusted when the engine is running.

A. True
B. False

18. The two basic types of valve seats are integral and _____.

A. pressed
B. replaceable
C. contact
D. loose

19. When you perform a wet compression test and the reading goes up, what is the most likely problem?

A. Good piston rings
B. Bad piston rings
C. Bad valve seat
D. Good valve seat

20. If you make a vacuum gauge test at sea level with the engine idling at 550 rpm and get a reading of 10 inches, what is the most probable cause?

A. Incorrect valve timing
B. Bad piston rings
C. Incorrect carburetor idle adjustment
D. Sticking valve

21. When performing a cylinder leakage test, you notice a loud hissing of air from the carburetor. This is an indication of what type of problem?

A. Hole in the piston
B. Bad piston rings
C. Incorrect carburetor idle adjustment
D. Leaking intake valve

22. The structural components of a piston are the head, skirt, ring grooves, and _____.

A. wrist pin
B. lands
C. connecting rod
D. bearings

23. The piston is subjected to extreme heat and pressure each time it moves, with a maximum pressure of _____ psi, and maximum heat of _____ degrees F.

A. 2000, 800
B. 1000, 800
C. 2000, 600
D. 1000, 600

24. Piston clearance is the space between the piston and the _____ .

A. head
B. cam shaft
C. crank shaft
D. cylinder wall

25. The connecting rods are made in the shape of a/an _____ beam.

A. I
B. A
C. D
D. E

26. Some crankshaft main bearings have an integral thrust face to eliminate _____.

A. vibration
B. heat
C. end play
D. lubrication

27. Tortional vibration occurs when the crankshaft twists because of what stroke?

A. Intake
B. Compression
C. Power
D. Exhaust

28. The flywheel on large slow moving engines is made of what material?

A. Cast iron
B. Steel
C. Spun copper
D. Aluminum