Book 6 Flashcards
Piston rings provide this movable seal
while operating under widely variable conditions of speed and acceleration, exposed alternately to vacuum and pressures as high as ____ p.s.i.
from hot corrosive gases which may approach ______ ˚F
800 psi
4,000 ˚F
Cylinder walls are lubricated on ______ strokes of the piston (________ and ______ strokes) by oil throw-off from the connecting rod bearing
Upward;
Compression and exhaust
There are two valves at the top of the cylinder.
The type of valve used in automotive engines is called a “ ____, _____ or________” valve.
“Poppet, mushroom or tulip”
What are the four strokes in the 4-stroke cycle gasoline engine ?
Intake
Compression
Power
Exhaust
The speed and the power output of diesel engines are controlled by the quantity of ____ injected into the cylinder
Fuel
What is the movement of a body against an opposing force?
Work
What is the ability to do work ?
Energy
What is the rate of work ?
Power
What are the 4 functions of engine lubrication oils ?
- To prevent metal to metal contact in moving parts
- To assist in carrying heat away from engine
- To clean engine parts as they lubricate
- Form a seal between piston rings and cylinder walls to prevent blow-by of the combustion gases.
What is the primary function of engine lubrication ?
Reduce the friction between moving parts
What type of axle is one that supports part of the weight of the vehicle and also drives the wheels connected to it ?
Live axle
Where the spot canbe made next to the curb, the aerial ladder operator knows that he can operate between the ___________floors and maintain a climbing angle of between 70˚ and 80˚degrees
5th and 8th
Where the spot is made outside of the line of cars, any operation below the ____ floor will be conducted at a climbing angle of less than 70˚ degrees
7th
To compensate for excessive street grades, spot the apparatus ________ from the area of operation
Downslope
