| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.88 |
| Score | 0% | 58% |
Which of the following is not an advantage that disc brakes have over drum brakes?
provide a larger contact area |
|
are more easily cooled |
|
provide more braking force |
|
use less brake fluid |
Brakes utlize friction to slow vehicle tires. Drum brakes employ a cast iron drum that roates with the vehicle axle. When hydraulic pressure is applied to the brake assemblies at the wheels, internal pistons expand and push brake shoes outward into contact with the brake drum slowing the rotation of the axle. More powerful disc brakes operate by pinching a rotating disc betweeen two brake pads and allow for a larger surface area to contact the disc, provide more force, and are more easily cooled.
What is the function of the head gasket?
to seal the exhaust system from the drive train |
|
to seal the engine block from the cylinders |
|
to connect the transmission to the drive train |
|
to seal the brake assembly from external contaminants |
A head gasket is a gasket that sits between the engine block and cylinder heads to seal the cylinders to ensure maximum compression and avoid leakage of coolant or engine oil into the cylinders.
For inline cylinder arrangements in an engine, how are the cylinders numbered?
sequentially from the front of the engine to the back |
|
alternating from the front of the engine to the back |
|
alternating from the back of the engine to the front |
|
sequentially from the back of the engine to the front |
Inline cylinder arrangements number cylinders sequentially (1, 2, 3, ...) front to rear.
What is the function of the alternator?
converts motion from the wheels into DC power |
|
charges the battery when the car is not running |
|
replaces the electrical energy that the car draws from the battery |
|
provides AC power for the car's electrical components |
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.
The combustion chamber is enclosed by the:
piston ring |
|
head gasket |
|
cylinder head |
|
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.