Choice and Conceptual Actual Exam Questions
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1. EFI computer stands for ___? - ANSWER Electronic Fuel Injection
computer
2. What does the EFI computer do? - ANSWER Determines the amount of
fuel entering the engine: receives information from the sensors in the fuel,
air, and exhaust system, and from that information, it determines how
much fuel the engine needs to operate at optimum levels
3. ___ is mechanically connected to the carburetor
OR ___ is electronically connected to the EFI computer - ANSWER Throttle
4. What does a Throttle do? - ANSWER Advancing (opening) the throttle
causes more fuel to be transferred to the carburetor or the fuel injectors.
The accelerator (gas pedal) is connected to the throttle by mechanical
linkages. The harder you push on the gas pedal, the farther the throttle is
advanced (opened). Thus, more fuel is transported to the carburetor or fuel
injectors.
5. What does the engine have because of the high temperature at which fuel
burns? - ANSWER Cooling system
,6. What are the 3 components of the engine's cooling system? - ANSWER
Water Jackets
Water Pump
Radiator
7. These surround the parts of the engine that reach the highest temperatures
(engine cooling system) - ANSWER Water jackets
8. This circulates water through the water jackets
(engine cooling system) - ANSWER Water Pump
9. (engine cooling system)
While the water circulates, it absorbs heat from the engine and then passes
through the ___, where outside air cools the water. - ANSWER Radiator
10.___ (a coolant) raises the boiling point of water (which keeps water from
boiling away) and lowers its freezing point (which keeps the system from
freezing up during cold weather) - ANSWER Antifreeze
11.___ is usually mixed with the water in an engine cooling system - ANSWER
Antifreeze
,12.A ___ circulates oil through the engine; oil flows through the crankshaft and
connecting rods, lubricating it as it goes. - ANSWER Oil Pump
13.Lubrication (from the oil pump) reduces ___, which in turn reduces ___. -
ANSWER Friction & Heat
14.An electric motor powered by the battery that starts the engine when you
turn the key - ANSWER Starter
15.This sends an electric current back to the battery to keep the battery
charged and also powers the other electronic gadgets on your car when the
engine is running - ANSWER Alternator
16.This supplies a high-voltage current to the spark plugs to ignite the fuel
mixture in the cylinders - ANSWER Ignition system
17.The ___ system takes the 12-volt current from the battery, steps it up to
about 20,000 volts, and then sends the current to the spark plugs -
ANSWER Ignition system
18.In older cars, this device uses electromagnetic induction to step up the
voltage
(ignition system) - ANSWER Coil
, 19.After leaving the coil, the current then passes through ___, an
electrical/mechanical switching device; controls the timing of the spark-plug
discharges
(ignition system, older cars) - ANSWER Distributer
20.A rotating shaft and a switch within the distributer that routes the current
through wires to the spark plugs
(ignition system, older cars) - ANSWER Breaker points
21.This absorbs excess current and protects the breaker points from the
damage by the high-voltage surge - ANSWER Condenser
22.In modern ignition systems, the distributer, coil, breaker points, and
condenser have been replaced by what? - ANSWER Solid-state
electronics controlled by a computer
23.A ___ controls the ignition system and adjusts it to provide maximum
efficiency in a variety of driving conditions - ANSWER Computer
24.Transfers the power of the engine to the wheels, making them move -
ANSWER Drive System
25.The shaft on which the wheels revolve - ANSWER Axle