90 Auto Engine Performance and Driveability
7. The camshaft turns at _____ the speed of the
crankshaft.
(A) about half
(B) exactly half
(C) about twice
(D) exactly twice
8. _____ and ____ are the two general types of variable
valve timing.
9. List two devices used to reduce engine vibration.
10. Cars and light trucks manufactured today are _____
cooled.
(A) air
(B) liquid
(C) oil
(D) thermostatically
11. The purpose of antifreeze is to:
(A) reduce rust and corrosion in the engine and
radiator.
(B) lower the freezing point of the engine coolant.
(C) increase the boiling point of the engine coolant.
(D) All of the above.
12. By pressurizing the cooling system, the boiling point
of the engine coolant is _____.
13. Engine oil is used to ______ various parts of the
engine.
(A) cool
(B) lubricate
(C) cushion
(D) All of the above.
14. Engines are usually lubricated by:
(A) pressurized oil.
(B) splashed oil.
(C) a combination of pressurized/splashed oil.
(D) None of the above.
15. Engine oil pressure is controlled by a pressure
regulator, typically in the range of:
(A) 5–15 psi (35–105 kPa)
(B) 15–20 psi (105–140 kPa)
(C) 20–35 psi (140–240 kPa)
(D) 35–45 psi (240–310 kPa)
ASE Certification-Type Questions
1. Technician A says that an engine must have sufficient
compression before it will start and run. Technician B
says that compression is developed on the power
stroke of a four-cycle engine. Who is correct?
(A) A only.
(B) B only.
(C) Both A & B.
(D) Neither A nor B.
2. All of the following statements about oil control rings
are true, except:
(A) oil control rings are installed below the
compression rings.
(B) there should be no oil at the compression rings.
(C) oil control rings scrape oil from the cylinder
walls when the piston is moving down.
(D) defective oil control rings will cause high oil
consumption
3. Technician A says that the intake valves are cooled
by incoming air. Technician B says that the intake
valve must be in contact with its seat long enough to
transfer heat to the cylinder head. Who is correct?
(A) A only.
(B) B only.
(C) Both A & B.
(D) Neither A nor B.
4. Cylinder heads contain all of the following, except:
(A) intake valves.
(B) exhaust valves.
(C) EGR valves.
(D) camshafts.
5. The valve train is the group of components that opens
the ______.
(A) intake valves
(B) exhaust valves
(C) EGR valve
(D) Both A & B.
6. A hydraulic lash adjuster, similar in operation to a
hydraulic lifter, maintains the proper valve clearance
on ______ engines.
(A) cam-in-block
(B) roller-lifter
(C) overhead cam
(D) All of the above.