A. accelerator-pump system. .
B. float.
C. fuel-pressure regulator
D. mixture-control solenoid.
2. When a vehicle is accelerated, the momentary fuel lag in the carburetor is overcome by the
A. float system. .
B. power system.
C. accelerator-pump system
D. main-metering system.
3. The carburetor鈥檚 venturi acts to increase the _______ when air is flowing through the carburetor鈥檚 air passageway.
A. manifold vacuum
B. air speed
C. air pressure
D. fuel pressure
4. The device in a carburetor that controls the volume of air flowing through the air passageway is the
A. needle and seat.
B. intake valve.
C. float.
D. throttle plate.
5. In most carburetors, the opening and closing of the throttle plates are controlled by the
A. computer-control system. C. vehicle鈥檚 driver.
B. venturi. D. choke system.
6. The main-metering system of a carburetor supplies fuel
A. at cruising speeds. C. at low engine speeds.
B. at idle. D. all of the time.
7. In a carburetor, the _______ controls the amount of fuel allowed to enter the fuel passageway.
A. size of the main jet C. throttle-plate position
B. fuel pressure D. float system
8. In a carburetor, an ISC device is used to control the
A. operation of the fuel pump. C. air-to-fuel ratio of the engine.
B. operation of the choke plate. D. idle speed.
9. A V-6 engine is equipped with a multiport SFI system. How many separate fuel injectors would this engine have, assuming that it doesn鈥檛 use a cold-start injector?
A. One C. Three
B. Two D. Six
10. One way to check for excessive exhaust backpressure is to use a
A. tachometer. C. voltmeter.
B. vacuum gage. D. compression gage.
11. In most electronic fuel-injection systems, the air-to-fuel ratio is controlled by
A. varying the electrical signal sent to the injectors.
B. varying the size of the injector opening.
C. changing the main-jet size.
D. the air-bypass system.
12. An SFI system is one in which the fuel injectors
A. are triggered all at the same time.
B. are triggered in the same order as the engine鈥檚 firing order.
C. have fuel flowing from them all of the time.
D. provide fuel only on the power stroke of the cylinder.
13. Which of the following fuel-injection systems uses only one or two larger injectors to provide fuel to all of the
engine鈥檚 cylinders?
A. A sequential fuel-injection system C. A central-point fuel-injection system
B. A multipoint fuel-injection system D. A multiport fuel-injection system
14. In a mutlipoint fuel-injection system, the idle speed is usually controlled by
A. the ISC. C. the throttle-plate position.
B. an air bypass. D. the mixture-control solenoid.
15. In a fuel-injection system, the fuel rail is the component that
A. delivers the fuel to each of the injectors on a multipoint system.
B. delivers fuel from the fuel tank to the fuel pump.
C. allows air and fuel to bypass around the throttle plates.
D. provides the electrical control signal for the injectors.
16. In an exhaust system, the main component that serves to reduce the amount of harmful emissions in the exhaust gas is the
A. muffler. C. tail pipe.
B. manifold. D. catalytic converter.
17. A cold-start injector is used on some multipoint fuel-injection systems to provide
A. more air to the engine during startup. C. more fuel to the engine during startup.
B. less air to the engine during startup. D. less fuel to the engine during startup.
18. The amount of time that an electronic fuel injector is energized (turned on) is called the
A. TPS signal. C. ISC signal.
B. pulse width. D. IAC signal.
19. In a carburetor, an M/C solenoid is used to control the
A. operation of the fuel pump. C. air-to-fuel ratio of the engine.
B. operation of the choke plate. D. idle speed.
20. In a fuel-injection system, the amount of air allowed to flow into the engine under normal circumstances is controlled by the
A. throttle-plate position. C. the computer-control system.
B. the mixture-control solenoid. D. choke-plate position.
Fuel systems help with injectors and caborators?
you can't get by like that you actually posted your whole test on here you better hope your teacher doesn't find it on here y'd be surprised of how many people use yahoo answers
Fuel systems help with injectors and caborators?
A
You need to study for yourself, I'm not studying for your test.
Nice try kid. do your own homework.
hahaha..
wow... way to cheat. It's not even rocket science!
I am assuming your talking about venturi type carburettors!
1.B,
2.A,
3.A,
4.D(this is where it gets chicken and eggy, The butterfly (throttle Plate) will open up allowing more air to flow burning more fuel increasing vacuum, but the flow of fuel is dampened Controlled by the needle which regulates how much fuel comes out one cant happen without affecting the other!)
5.C
6.D ( If theres any change in demand (load) that is sufficient enough to cause a pressure change great enough to discharge fuel through the main jet then its in play anything more than idle.
7.A,C,D theres an argument to support all three of these answers.
8.D
9.D
10.B
11.A
12.B
13.C
14.A
15.A, and single point injectors.
16.D
17.C
18.B
19.C
20.A
