Terms & Questions Flashcards
To pass this class
The overcoming of resistance
WORK
Loss of head at the entrance of a pipe
TURBULENCE
The quantity of a substance that moves past a point in a given time
FLOW RATE
Force exerted by a substance on a unit of area
PRESSURE
Capacity to do work
ENERGY
Rate a mass travels in a particular direction
VELOCITY
Acts in accordance with law of freely falling bodies
GRAVITY
The rate at which work is done
POWER
The rate at which velocity in a mass increases with time
ACCELERATION
Unlike atoms are bonded together chemically
COMPOUND
Force or shock of a confined fluid
WATER HAMMER
Closed space at which all air has been removed
VACUUM
Resistance to flow
VISCOSITY
A force that resists the relative motion or tendency to such motion of two bodies or substances in contact
FRICTION
Pressure arising from the height of a liquid is called?
HEAD
Chemical changes in which oxygen plays a part are often referred to as?
COMBUSTION
-&-
OXIDATION
The state of matter is determined by its?
TEMPERATURE
-&-
PRESSURE
The the air or gaseous envelope surrounding earth is considered to be composed of what percent oxygen?
21%
Absolute zero or the temperature where all molecular motion ceases is?
-460 DEGREES
FAHRENHEIT
The power of matter to be floated by a fluid is called?
BUOYANCY
Resistance to flow is measure of a fluids?
VISCOCITY
What are the 2 kinds of velocity?
CONSTANT
-&-
VARIABLE
The rate at which work is done is called?
POWER
The rate at which the velocity of a mass increases with time is called?
ACCELERATION
By doubling the velocity of the flow of water, we can increase its power to suspend particles ______ times?
Increasing velocity of flow through a pipe, does what to the kinetic energy?
INCREASES
Of the six simple machines
Which 2 are the “basic machines”
While the others are adaptations?
1.) LEVER
2.) INCLINED PLANE
What are the 3 functions of a machine?
1.) CHANGE MAGNITUDE OR INTENSITY OF FORCE
2.) CHANGE DIRECTION OF FORCE
3.) CHANGE SPEED RESULTING FROM FORCE
The pivot point of a lever is called?
FULCRUM
Which class lever increases speed of distance rather than force?
Third Class
Speed is developed on a wheel and axle when effort is applied to the?
AXLE
A fixed pulley changes direction and _______ the mechanical advantage?
DOES NOT CHANGE
If one gear of a pair is much smaller than the other,
the smaller gear is called?
PINION
An odd number of gears in a simple gear train produces a change in direction?
FALSE
The distance between 2 successive threads on a screw is called?
PITCH
