Chpt 23 Flashcards
What’s the normal oil pressure range of an engine lubrication systems?
The normal engine oil pressure range is from 10 to 60 psi.
Technician. A stated that the lubrication system helps to seal the piston rings,
true
technician B stated that the lubrication system helps to hold their in suspension in the oil until it can be drained from the engine.
true
Technician. A stated that the estimated oil temperature can be determined by adding 150 degrees Fahrenheit to the engine temperature.
False
Tennison be stated that the oil temperature in an engine should not exceed a 100 degrees ferenheit
False
Which of the following is least likely to affect the capacity of an oil pump?
The viscosity of the fuel.
Technician A stated that all. Oil pumps are called positive displacement pumps.
True
Technician b stated that the pressure delivered by an oil pump reduces as the speed of the pump increases.
False
Technician A stated that the rotor type oil pump is driven by the camshaft.
False
Technician b, stated that the gerotor type of oil pump has 2 rotors with the inner rotor having a greater number of teeth than the outer rotor.
False
Which of the following is true of oil passages
The main oil gallery In an engine is also called a longitudinal header
Technician a stated that a nozzle can be used to guide the oil flow to the cam drive for gears.
True
Technician b stated that the positive oil flow can be directed by a camfer on bearing parting surface.
A true
Which of the following is true of a dry sump system
It uses an externally mounted oil reservoir.
Which of the following is an advantage of the dry sump system
The system helps in improving, cornering of the vehicle as the engine can be mounted lower
Hydrodynamic lubrication he is created by the wedging action of oil between the crankshaft journal and the can be as high as
1000 psi
In typical engine lubrication systems but components are the last to receive oil and the first to suffer from a lack of oil or oil pressure
Valve train components.
A typical oil pump can pump how many gallons per minute
3 to 6 gallons.
What type of oil pump is driven by the crankshaft?
Gerotor and internal/external gear.
Oil passages in the engine block are usually called.
Galleries
An engine oil cooler uses what to cool the oil.
Coolant
Lower than specified oil pressure is measured on a high mileage engine. Technician a says that worn main or rod bearings could be the cause.
False
Lower than specified oil pressure is measured on a high mileage engine. Technician b says that a clogged oil pump pickup screen could be the cause.
True
Technician. A says that many oil pumps are driven directly off the front of the crankshaft.
True
