| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.91 |
| Score | 0% | 58% |
When a car engine is running, what provides electrical current to recharge the battery and power the electrical system?
solenoid |
|
camshaft |
|
alternator |
|
battery |
Once the engine is running, the alternator provides electrical current to recharge the battery and power the electrical system. The alternator is driven by the engine's crankshaft and produces alternating current (AC) which is then fed through a rectifier bridge to convert it to the direct current (DC) required by the electrical system. A voltage regulator controls the output of the alternator to maintain a consistent voltage (approx. 14.5 volts) in the electrical system regardless of load.
Cylinder air and fuel intake valves, exhaust valves, and mounts for spark plugs and fuel injectors are contained in the:
piston ring |
|
manifold |
|
head gasket |
|
cylinder head |
Cylinders act as a guide for the pistons that translate the heat energy of combustion into the mechanical energy necessary to move a vehicle. Piston rings seal the piston to the cylinder to contain combustion gases and also regulate the oil distribution between the piston and cylinder wall. A cylinder head closes in the top of the cylinder forming the combustion chamber which is sealed by a head gasket (head). The head provides space for air and fuel intake valves, exhaust valves, and mounts for spark plugs and fuel injectors.
What is the function of the alternator?
provides AC power for the car's electrical components |
|
charges the battery when the car is not running |
|
replaces the electrical energy that the car draws from the battery |
|
converts motion from the wheels into DC power |
An automobile's electrical system runs on DC power and the bulk of that power is supplied by the battery. The alternator converts the motion of the rotor into AC power which is then fed through the rectifier to convert it to DC power that both the car and the battery can use.
What function does a two-stroke cycle engine perform on the second stroke?
fuel intake and compression |
|
fuel intake and exhaust |
|
combustion and exhaust |
|
compression and combustion |
The two strokes of a two-stroke cycle engine are fuel intake and compression then combustion and exhaust.
The combustion chamber is enclosed by the:
cylinder head |
|
head gasket |
|
piston ring |
|
piston |
Cylinders act as a guide for the pistons that translate the heat energy of combustion into the mechanical energy necessary to move a vehicle. Piston rings seal the piston to the cylinder to contain combustion gases and also regulate the oil distribution between the piston and cylinder wall. A cylinder head closes in the top of the cylinder forming the combustion chamber which is sealed by a head gasket (head). The head provides space for air and fuel intake valves, exhaust valves, and mounts for spark plugs and fuel injectors.