Gallery plugs and frost plugs should be installed:
If a water pump impeller is installed closer to the pump housing than specifications, it may cause:
Thermostats are installed:
Under increased surface pressure, water, fuel, brake fluid and other liquids, will boil or vaporize at:
Removing the radiator cap on a hot engine will often result in a large loss of coolant and create a danger for serious burns. This occurs because
What is the approximate boiling point of water with an eight pound pressure cap at sea level?
Water pumps on mobile equipment are usually ___________ type pumps.
The primary reason shrouding is used around a fan is to:
Which of the following is an anti-friction bearing?
When checking fan belts, not only the condition is checked but also the:
The purpose of the cooling system is to:
The purpose of a radiator pressure cap is to:
Any cooling system liquid, water or antifreeze, should have as a necessary ingredient(s).
When an engine fan switch in the cab is moved to the manual on position, the shutters should open (if equipped) and the fan should be activated immediately.
A low silicate antifreeze must be used in diesel engines to prevent silicate breakdown and a subsequent:
Water pumps may be either belt or gear driven.
A customer complains that his engine fan does not always kick in on and that his engine temperature rises too high. By turning his engine fan switch to manual he is able to kick his fan in. The item most likely at fault here is the:
Oils, antifreeze and other fluids may boil or vaporize, either because of very low pressure (vacuum) conditions, or by contact with very hot surfaces. This may produce or cause erratic operational problems and potential significant damage. This condition is referred to as:
The tester in the figure below may be used to test the following items except:
A vehicle has an overheating problem. The vehicle sometimes overheats within a short time after the engine is started. Other times, the engine starts and the cooling system operates normally. What is the likely cause?
While discussing cooling system flushing, it was determined the most correct method is to:
When filling a cooling system, Technician A says to fill half the system capacity with pure antifreeze and the remaining amount with water. Technician B says to use at least a 50/50 mixture of water to coolant mixture to fill the cooling system. Who is right?
Technician A says a defective water pump bearing may cause a growling noise when the engine is idling. Technician B says the water bearing may be ruined by coolant leaking past the pump seal. Who is right?
The water return valve in the radiator cap is stuck closed. The result could be:
A vacuum operated blend door actuator diaphragm:
Milky oil on the engine dipstick indicates:
There is complaint of insufficient heat in the cab. Technician A says that air trapped in the cooling system could be the cause. Technician B says that a closed or defective water hand valve could be the cause. What is right?
A smeary film on the windshield and a sweet odor in the cab may be evidence of:
The heater blower motor operates only at high speed or off. Technician A says that a defective blower switch could be the cause. Technician B says that a defective blower resistor could be the cause. Who is right?
An air-activated engine fan clutch fails to engage. Technician A says that the temperature sensitive air valve may be defective. Technician B says there may be a problem with the air supply system. Who is right?
What can be determined with the engine coolant by checking it with pH strips?
What is the most common reason for replacing the water pump?
At sea level, a cooling system that operates with a 10 lbs. radiator cap will have:
A surge tank in a cooling system is used to:
When refilling the cooling system, to ensure that the system is full of coolant after an engine block has been drained, a technician should:
Upon inspection, a technician finds that there is a lot of engine oil mixed with the coolant in the radiator, with no other obvious indicators. The most likely starting place to look for the problem is the:
A cooling system is pressurized with a pressure tester to locate a coolant leak. After 15 minutes, the tester gauge has dropped from 15 to 5 psi, and there are no visible signs of coolant leaks in the engine compartment. Which of these is not likely to be at fault?
Before draining oil, the engine should be brought to operating temperature so that:
The filter type that is removed and replaced as a complete filter unit is:
The first item to check for when starting an engine after an oil change is:
A technician says that if fuel is leaking into the engine oil crankcase, severe engine damage will occur. One of the early indicators is the engine oil will:
The degree of filtration in a filter is measured in:
An oil pressure gauge utilizing a bourdon tube would be a (n):
Technician A says that the function of engine oil is to reduce friction and act as a cleaning agent. Technician B says that the function of the engine oil is to seal piston rings and remove heat from engine components. Who is correct?
Approximately ___________of the amount of oil an engine oil pump delivers passes through a by-pass oil filter.
Engine full flow oil filtering systems are designed that, in the event that the filter becomes plugged or the oil is too cold:
The large diesel engine''s oil pump is generally ____________ driven.
What type of oil pumps are generally used on H.D. diesel engines?
An excessively high oil level may result in:
A low oil pressure reading on the gauge when the engine is idling and a normal reading when the engine is revved up may indicate:
Share your Results: