1 Flashcards
What component receives electricity from the battery for the purpose of cranking the engine?
Starter motor
What hydraulic valve limits pressure at the rear drum brakes when high pressure is applied to front disc brakes?
Proportioning valve
What is located directly over the cylinders?
Combustion chamber
Brake fluid level in the master cylinder is low, however no external fluid leaks are observed. What is the possible cause?
Worn disc brake pads
When 12.6 volts are available from the battery, but 1.2 volts are lost due to unwanted resistance, how much voltage will the starter motor receive?
11.4
When an engine is at operating temperature, under-hood components are very hot. Contact with any of these parts could result in:
Burns.
Everyone in the auto shop MUST wear safety glasses:
At all times.
What is the MOST common cause of premature engine component failure?
Poor maintenance
Which engine valve is the largest?
Intake
What electrical circuit has more than one path?
Parallel
The air/fuel mixture is ignited by?
Spark plug
What is the stop, drop, and roll rule?
Fire safety rule
How many CV joints do most drive axles have?
2
Drive belts that cracked or glazed should be:
Replaced
What component closes engine valves?
Valve spring
What is the most dangerous part of gasoline?
Vapors
Oil filter elements are made of?
Paper
What is the most common type of brake fluid?
DOT 3
Brake fluid contaminants may be removed by:
Flushing
What is the function of crankshaft counterweights?
Prevents vibration
What is the most modern type material used to make disc brake pad lining?
Ceramic
What valve is open on the exhaust stroke?
Exhaust
When the piston has reached the top of its travel, it is said to be at: _______
Top dead center
How many crankshaft revolutions are required to complete the four stroke cycle?
Two
What component transfers piston movement to the crankshaft?
Connecting rod
An electrical measurement tool that measures volts, amps, and resistance is known as a/an: _______
Multimeter
What could be used to quickly check for electrical power in a circuit?
Test light
What is the voltage of a fully charged 12 volt battery?
12.66 volts
What could be used to test fuses, fusible links, and circuit breakers?
Test light
The starter motor rotates the engine for start up by engaging with the: _______
Flywheel
The alternating current produced in the alternator must be changed to: _______
DC current
What is the battery voltage rating on most automotive products?
Twelve
What component is responsible for charging the battery in an automobile?
Alternator
The alternator generates electricity to charge the battery and power the vehicle’s electrical systems.
Where can a technician find the VIN number of an automobile?
Left side of dash panel
The VIN (Vehicle Identification Number) is typically located on the driver’s side dashboard, visible through the windshield.
What color are most automatic transmission fluids?
Red
Red is the common color for automatic transmission fluids, indicating their specific type and function.
What material is most often used to construct engine cylinder blocks?
Cast iron
Cast iron is favored for its strength and durability in engine construction.
What could be the result of leaving spilled oil or fluid on the shop floor?
Falling
Spilled oil or fluids create slippery surfaces, increasing the risk of slips and falls in the shop.
What is an important service procedure for extended engine life?
Change oil regularly
Regular oil changes help maintain engine lubrication and prevent wear over time.
What term refers to the removal of air from the brake system?
Bleeding
Bleeding the brake system ensures there are no air bubbles that can affect brake performance.
What cancer-causing material may be found in brake shoe dust?
Asbestos
Asbestos was commonly used in brake materials but is now regulated due to health risks.
What component fits around the piston and forms a seal between the piston and cylinder block?
Piston rings
Piston rings are crucial for maintaining compression and preventing oil leakage in the engine.
Disc brake calipers are larger than wheel cylinders; therefore, front brakes may be applied with greater _______.
Force
The larger size of disc brake calipers allows them to exert more force on the brake pads.
Brake fluid is manufactured according to requirements of:
DOT
The Department of Transportation (DOT) sets standards for brake fluid in vehicles.
What specifications should be followed when tightening wheel lug nuts?
Manufacturers
Following manufacturer specifications ensures proper torque and safety of wheel installations.
What part of a new oil filter should be lubricated before installation?
Seal
Lubricating the seal helps ensure a proper fit and prevents leaks when the oil filter is installed.
The purpose of the anti-lock brake system is to perform the pumping action for the _______.
Driver
The anti-lock brake system (ABS) automatically modulates brake pressure to prevent wheel lockup during hard braking.
What safety item MUST be worn when working around batteries?
Eye protection
Eye protection is essential to safeguard against acid splashes and electrical hazards.
What connection should be made LAST when installing a new battery?
Ground
What type socket should be used with an air impact wrench?
Impact
Impact sockets are designed to withstand the high torque generated by impact wrenches.
Where can a technician find the VIN number of an automobile?
Left side of dash panel
The VIN is commonly located on the driver’s side dashboard, visible through the windshield.
What color are most automatic transmission fluids?
Red
Red fluid typically indicates that the automatic transmission fluid is in good condition.
What material is most often used to construct engine cylinder blocks?
Cast iron
Cast iron is favored for its strength and durability, although aluminum is also used in some applications.
What changes in the hydraulic system when cylinder size is varied?
Force applied
Varying cylinder size affects the hydraulic pressure and the force exerted by the system.
What type noise is produced when the wear indicator touches the brake rotor?
Squeak
A squeak alerts drivers that brake pads may need replacement due to wear.
