intro 47
Technician A says liquid cooling an engine maintains a constant operating temperature. Technician B says that air cooling lets the engine operate more efficiently. Who is correct?
A only
An MSDS is being discussed. Technician A says it is the shop's responsibility to develop it. Technician B says it must be readily available to all shop personnel. Who is correct?
B only
Technician A removes a battery by disconnecting the positive cable first. Technician B uses a battery lifting strap to lift the battery out of the vehicle. Who is correct?
B only
Technician A says OSHA regulates vehicle emission standards. Technician B says the Environmental Protection Agency [EPA] regulates the disposal of hazardous wastes. Who is correct?
B only
Technician A says a torsion bar is a type of shock absorber. Technician B says shock absorbers slow the upward and downward movement of the vehicle after a bump. Who is correct?
B only
Two technicians are discussing an OBD II vehicle that has a flashing check engine light. Technician A says there is problem with the engine lubrication or cooling system and the vehicle must not be driven, otherwise serious engine damage will occur. Technician B says there is a severe ignition misfire and the driver should reduce speed and engine load and have the vehicle serviced as soon as possible. Who is correct?
B only
When lifting heavy parts, Technician A twists at the waist to change direction. Technician B turns his whole body using his feet. Who is correct?
B only
What is the purpose of the valve train?
It opens and closes the intake and exhaust valves of each cylinder
What component listed here is not a part of the heating system?
compressor
The motion of the piston and the rotation of the crankshaft is monitored by the _____ position sensor.
crankshaft
A class C type fire extinguisher can be used on what type of fires?
electrical wiring
On a vehicle with a manual transmission, the clutch assembly is connected to the ______.
flywheel
Federal Right-to-Know laws concern ______.
hazards associated with chemicals used in the workplace
Although the exact proper time varies with engine design, ignition must occur_____.
just before the end of the compression stroke
What type of gloves should be worn when working on the electrical system of a hybrid vehicle?
lineman's
Battery charging is being discussed. Technician A says the charger should be turned on before connecting the charger cables to the battery terminals. Technician B says a battery with frozen electrolyte should be charged for thirty minutes or until the electrolyte melts. Who is correct?
neither A nor B
CAFE is being discussed. Technician A says it refers to a vehicle's emissions level. Technician B says it stands for Corporate Average Federal Emissions. Who is correct?
neither A nor B
Steering systems are being discussed. Technician A says most passenger cars use a recirculating ball-type mechanism. Technician B says most pickup trucks and SUVs use a rack-and-pinion mechanism. Who is correct?
neither A nor B
Technician A says carbon monoxide has an odor similar to burnt oil. Technician B says a volatile liquid evaporates slowly. Who is correct?
neither A nor B
Technician A says hybrid cars must be plugged in at night to recharge the batteries. Technician B says a hybrid cannot be a high-performance vehicle because the electric generator constantly uses energy to recharge the batteries, reducing power from the gasoline engine. Who is correct?
neither A nor B
When driving out rusted bolts, Technician A places the round end of a ball-peen hammer over the bolt and then hits the flat end of the ball-peen hammer with a sledge hammer. Technician B uses a Phillips tip screwdriver and a ball peen hammer to drive out small rusted bolts. Who is correct?
neither A nor B
The high voltage electrical cables (harness cover) of a hybrid vehicle are colored ______.
orange
Because the electric motors in hybrid vehicles have very strong permanent magnets people with _____ should not work on or near them.
pacemakers
What type of gloves should be worn for cleaning parts in solvent?
polyurethane rubber
Which component in the cooling system raises the boiling point of the coolant?
pressure cap
A recirculating ball-type design is associated with the ______ system.
steering
A torsion bar is associated with the ______.
suspension system
Engine power is transferred to an automatic transmission through a ______.
torque converter
Which of the following extinguishers is recommended to put out electrical fires?
type C
Technician A says cooling system pressure is controlled by the radiator cap. Technician B says cooling system pressure is controlled by the thermostat. Who is correct?
A only
A hybrid vehicle needs to be moved from the roadside into the shop. Technician A says it should be towed on a flatbed truck. Technician B say it can be transported with its drive wheels on the ground as long as the transmission is in neutral. Who is correct?
A only
Automatic transmissions are being discussed. Technician A says they typically use planetary gearsets. Technician B says they always come equipped with a transfer case. Who is correct?
A only
Ergonomic hazards are being discussed. Technician A says they impede normal body position and motion. Technician B says they are the result of noise or vibrations. Who is correct?
A only
Technician A says used engine oil may be burned in an EPA approved commercial space heater. Technician B says oil filters should be thrown in the trash immediately after being removed from the vehicle. Who is correct?
A only
Which emission control system introduces exhaust gases into the intake air to reduce the formation of NO X (oxides of nitrogen) in the combustion chamber?
EGR
Which of the following statements about safety glasses is true?
a. They should offer side protection b. The lenses should be made of a shatterproof material c. Some service operations require additional eye protection to be worn with safety glasses
Modern engines do not use a distributor; instead they have one ignition coil _____.
a. for each spark plug b. for every two spark plugs
Gasoline is---
a. highly volatile b. highly flammable c. dangerous, especially in vapor form
Failure to report a hazardous waste spill can result in a penalty of ______.
both "$10,000" and "one year in jail"
Hybrid vehicles are being discussed. Technician A says a hybrid can run on electric power or on the internal combustion motor, but never on both. Technician B says the internal combustion engines used in hybrids are specially designed to be assisted by electric power and as a result are more fuel efficient and cleaner than conventional engines. Who is correct?
both A and B
Hybrid vehicles are being discussed. Technician A says the hybrid batteries are recharged by the engine during normal driving. Technician B say the batteries are recharged when the brakes are applied as the vehicle slows down. Who is correct?
both A and B
OBD II systems are being discussed. Technician A says the system can detect problems even before the driver is aware of a drivability problem. Technician B says when a problem is detected, the system will store a diagnostic trouble code in the vehicle's computer's memory. Who is correct?
both A and B
Technician A says a four-wheel drive vehicle uses a transfer case. Technician B says an all wheel drive [AWD] vehicle has a center differential. Who is correct?
both A and B
Technician A says all hazardous wastes must be properly labeled and sealed and kept in the recommended containers. Technician B says to reduce the amount of hazardous waste generated by a shop, parts should be initially cleaned with used solvent, then a second time with clean solvent. Who is correct?
both A and B
Technician A says power brake systems use a vacuum booster to increase the force applied to the master cylinder. Technician B says power brake systems use hydraulic pressure from the power steering pump to increase the force applied to the master cylinder. Who is correct?
both A and B
Technician A says that you wear shoes with nonslip soles in the shop. Technician B says safety shoes have steel plates built into the toe and shank to protect your feet. Who is correct?
both A and B
Technician A says vehicle refrigerants must be recovered and recycled. Technician B says splash goggles should be worn when servicing an air-conditioning system. Who is correct?
both A and B
Technician A uses a respiratory mask [respirator] when working with solvents and painting. Technician B uses a mask [particle mask] when working on or handling parts made with asbestos. Who is correct?
both A and B
Which component is located in the vehicle's exhaust system?
catalytic converter
A high concentration of undesirable vapors, gases, or dust can be classified as a(n) ______.
chemical hazard
