1405: Chapters 7-9, 14

Which hose typically has a spiral wire reinforcement?

lower radiator

If the fan shroud is removed from a vehicle

the engine will overheat during prolonged idling

The petcock valve is located

at the bottom of the radiator

Hoses are sized based on their ______

inside diameter

Which of the following is recommended to extinguish electrical fires?

Class C fire extinguisher

What is compression ratio?

The ratio of the volume of a cylinder with the piston at BDC to the volume of the cylinder with the piston at TDC

Two technicians are discussing the measurement of antifreeze concentration in coolant. Technician A uses a coolant hydrometer. Technician B uses a refractomer. Who is correct?

both

Water pumps are _____ type pumps.

centrifugal

A high concentration of undesirable vapors, gases, or dust can be classified as a(n)

chemical hazard

If the engine overheats during long periods of idling but runs normally at highway speeds, the problem is most likely

defective cooling fan

Radial tires should be rotated every _____ miles after being initially rotated at 7,500 miles.

15,000

Failure to report a hazardous waste spill can result in a penalty of

both

Which of the following is NOT a good reason to replace a belt

squealing or chirping

The VIN number includes all the information listed below EXCEPT

vehicle weight

If a ball joint has a threaded plug, the plug can be removed and a _____ fitting installed that will allow the ball joint to be greased periodically.

zerk

Technician A says the engine displacement can be found on the engine ID tag. Technician B says the date the engine was assembled can be found in the casting numbers on the cylinder block. 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

Two technicians are discussing the proper coolant to use on a late model GM vehicle. Technician A says that "DEX-COOL" type Organic Acid Technology [OAT] is the proper coolant to use. Technician B says that Ethylene Glycol [good old green] type antifreeze can be used on any vehicle. 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

Installing an oil pump in an engine: Technician A packs the pump with petroleum jelly. Technician B submerges the pump in clean oil and rotates the pump shaft to fill the pump body. 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 the American Petroleum Institute has established an oil viscosity classification system. Technician B says thick viscosity oils receive high rating numbers. Who is correct?

B only

Two technicians are discussing a car with a very noisy water pump. The pump makes a lot of noise but is not leaking coolant. Technician A says the owner can continue to drive the vehicle as long as there are no signs on coolant leakage. Technician B says the water pump must be replaced immediately. Who is correct?

B only

Two technicians are discussing compression testing on a hybrid vehicle equipped with an Atkinson cycle engine. Technician A says the compression reading of an Atkinson cycle engine is normally higher than a conventional engine. Technician B says a scan tool may be needed to perform the compression test. Who is correct?

B only

Two technicians are discussing testing coolant with test strips. Technician A says the test strip measures freezing protection level. Technician B says the test strip measures coolant acidity. 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

The best method to use to loosen a bolt is

Both "a socket and ratchet" and "a box end wrench"

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

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

Technician A wipes off the outside of a zerk fitting before injecting grease into it. Technician B injects just enough grease to cause the boot to expand slightly. Who is correct?

both

Two technicians are discussing a vehicle with an overheating problem. There are no leaks, internal or external. The belts are in good condition, and the radiator has been removed and flow tested. Everything appears to be in good condition. A new thermostat was installed, but it did not cure the problem. Technician A says the impeller could be slipping on the water pump shaft. Technician B says the impeller blades could be corroded. Who is correct?

both

Two technicians are discussing diesel engines. Technician A says all diesel engines are fuel injected. Technician B says glow plugs help ignite the fuel when the engine is cold. Who is correct?

both

When testing a radiator cap, with the rated pressure applied, the cap should hold that pressure for at least

1 minute

The VIN number for vehicles built in the United States begins with

1 or 4

The stroke of an engine is _____ that of a crankshaft throw.

2 times

Most manufacturers recommend that cooling systems should be drained, flushed, and filled every

2 to 4 years

When must a thermostat be fully opened?

20 degrees F above the start to open temperature

For every 1 pound of pressure put on engine coolant, the boiling point of the coolant is raised about _____ degrees Fahreheit degrees (_____ degrees Celsius).

3.25 (1.8)

The typical recommended mixture of water and antifreeze is

50/50

To complete a four-stroke cycle in one cylinder, the crankshaft must rotate _____ degrees.

720

A hybrid vehicle needs to be towed into the shop. Technician A says it should be towed on a flatbed truck. Technician B say it can be towed with its drive wheels on the ground as long as the transmission is in neutral. Who is correct?

A only

After servicing a hybrid car, the engine will not start. Technician A says the wrong engine oil was installed. Technician B says the wrong type of brake fluid was used. 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 cooling system pressure is regulated by the pressure relief valve in the water pump. Technician B says cooling system pressure is regulated by the radiator cap. Who is correct?

A only

Technician A says grease fittings are found on parts of the steering system. Technician B says grease fittings are found on parts of the brake system. Who is correct?

A only

During engine warm-up, when the thermostat is closed,

Coolant flows through the bypass passage

Before replacing a serpentine belt

Located the belt routing diagram on the underhood decal or shop manual; if none is found draw your own

Which of the following statements about safety glasses is true?

all of the above

Mesothelioma is a form of lung cancer that is caused by exposure to

asbestos

In what type of engine is the intake valve held open longer than normal during the compression stroke?

atkinson cycle engine

A vehicle is towed into the shop with a thrown serpentine belt. Technician A checks for a worn pulley bearing. Technician B checks for a faulty tensioner. Who is correct?

both

Diesel engines are being discussed. Technician A says diesel engines have a distributor-type injection pump. Technician B says diesel engines have a common fuel rail and the injectors are controlled by the computer. Who is correct?

both

Directional tires are being discussed. Technician A says directional tires should not be cross rotated, but rotated front to rear. Technician B cross rotates the tires by dismounting them from the rims, flipping them over and remounting. Who is correct?

both

During routine service a small amount of engine oil is found in the air cleaner housing. Technician A says the PCV valve may be clogged. Technician B says the engine could be overfilled with oil. Who is correct?

both

Front engine, longitudinal layout is being discussed. Technician A says this layout is used in rear-wheel drive vehicles. Technician B says this layout is used in some front-wheel drive vehicles. Who is correct?

both

Sludge is being discussed. Technician A says sludge results from the oxidation of oil. Technician B says a slight buildup on the underside of the oil fill cap is normal. Who is correct?

both

Technician A aims the nozzle of a fire extinguisher at the base of the fire. Technician B uses a sweeping motion, back and forth over the entire width of the fire. Who is correct?

both

Technician A checks V-belt tension by pressing his thumb firmly on the longest straight span of the belt and measuring the amount of deflection. Technician B uses a belt tension gauge. Who is correct?

both

Technician A says V-belts are manually tensioned and require periodic adjustment. Technician B says serpentine belts are normally automatically adjusted. Who is correct?

both

Technician A says a cooling system pressure tester is used to test for leaks in the radiator, hoses, water pump, thermostat, and engine assembly. Technician B say the cooling system pressure tester is used to check the operation of the relief valve in the radiator cap. Who is correct?

both

Technician A says a dry sump lubrication system eliminates the possibility of oil sloshing and possible oil starvation during hard cornering, braking, and acceleration. Technician B says a dry sump lubrication system allows the engine to be mounted lower in the frame, improving handling. Who is correct?

both

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

Technician A says an electric cooling fan may come on at any time without warning, even if the engine is not running. Technician B says an electric cooling fan may be controlled by the engine control computer. Who is correct?

both

Technician A says engine displacement is commonly measured in cubic millimeters. Technician B says it is commonly measured in cubic inches. Who is correct?

both

Technician A says high crankcase pressure can be caused by worn piston rings. Technician B says low crankcase pressure can be caused by a faulty PCV system. Who is correct?

both

Technician A says it is recommended 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

Two technicians are discussing oil filters. Technician A says the oil filter has an anti-drain-back valve that prevents the oil in the filter and engine oil passages from returning to the sump when the engine is shut down. Technician B says the oil filter has a bypass valve that in the event the filter becomes plugged, oil can flow directly to the bearings. Who is correct?

both

The volume of the combustion chamber when the piston is at BDC divided by the volume of the chamber when the piston is at TDC is called

compression ratio

Both valves are closed on the _____ strokes.

compression, power

In most automotive applications, the water pump is driven by the

crankshaft

The reciprocating movement of the piston is converted into rotary motion by the

crankshaft

What component of the engine determines the stroke?

crankshaft

Which of the following engine problems may be indicated by good results from a compression test and a cylinder leakage test but poor results from a cylinder power balance test?

defective ignition coil, defective spark plug wire, worn spark plug, damaged head gasket, worn piston rings

Which of the following tools can be used to test the operation of the thermostat without removing it from the engine?

digital infrared thermometer

To drain a cooling system that does not have a petcock or drain plug in the radiator

disconnect the lower radiator hose

Which V-type engine valve train design may use four camshafts?

double overhead camshaft (DOHC)

A class C type fire extinguisher can be used on what type of fires?

electrical equipment (motors, appliances, wiring, fuse boxes, switchboards)

The component connected to the crankshaft that serves to store some of the engine's power is the

flywheel

Federal Right-to-Know laws concern

hazards associated with chemicals used in the workplace

Oil coolers are normally found on _____ vehicles.

high performance

What type of gloves should be worn when working on the electrical system of a hybrid vehicle?

lineman's gloves

The tenth character in the VIN is the

model year

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

Engine oil pressure testing is being discussed. Technician A says that oil pressure should be tested with the engine cold. Technician B says oil with viscosity that is too high may cause lower than specified pressure. Who is correct?

neither

Technician A says carbon monoxide has an odor similar to burnt oil. Technician B says a volatile liquid evaporates slowly. Who is correct?

neither

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

Blue exhaust smoke is an indication of

oil burning in the combustion chamber

The high voltage electrical cables [harness cover] of a hybrid vehicle are colored

orange

A class A type fire extinguisher can be used on what type of fires?

ordinary combustibles (wood, paper, cloth, rubber, plastics, etc)

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

On a 4-cylinder engine that has a firing order of 1342, if number 1 cylinder is on the exhaust stroke, what stroke is number 3 cylinder on?

power

Which of the following is a function of the engine's lubrication system?

provides oil to cool, clean, lubricate, and seal engine

What type of ICE engine listed below is commonly found in a hybrid vehicle?

rotary engine (Wankel engine)

A wet compression test is performed on an engine after a dry compression test revealed low compression on one cylinder. If the compression on the low cylinder rises, it indicates

the piston rings are the problem

Which of the following cooling system hoses is normally subjected to the roughest service life?

upper radiator