4th Class Power Engineering Part A Exam /
Newest Actual Test Complete 630+ Questions
and Correct Detailed Answers
Terms in this set (637)
Change in position / time Velocity (m/s)
Change in velocity (m/s) / Acceleration (m/s^2)
time (s)
mass (kg) x accelerationForce (Newton)
(m/s^2) , any action on a body
that tends to change its size,
shape, or its state of rest or
motion
mass (kg) x 9.81 m/s^2 Force of Gravity
Force (N) / area (m^2) Pressure (Pa)
Force (N) x distance (m) Work (J)
Work done / time , Rate of Power
doing work
mass x gravity x height , the Potential Energy (J)
ability of a body to do work
due by virtue of its position
1/2 x mass x velocity^2 , The Kinetic Energy (J)
ability of a body to do work
due to its motion
The capacity of a body to do Energy (J)
work
,1000 kilograms Tonne
Force (N) x Distance (m) , A Moment of Force (Nm)
force, acting on a body at any
distance from a point on that
body, will tend to produce
rotation around that point
Equal to Counterclockwise Clockwise Moments
moments
Equal to Downward forces Upward Forces
Load (N) / Effort (N) Actual Mechanical Advantage (Ma)
Distance moved by Effort Velocity Ratio (VR)
/ Distance moved by Load
Output Work / Input Work Efficiency
Load x Distance moved by Output Work
load
Effort x Distance moved by Input Work
effort , Equals Output work
+ Wasted work
Equal to Velocity Ratio Ideal Mechanical Advantage (MA)
(VR)
Equal to Effort x R Load x r
Equal to R/r and D/d VR
Equal to R/r Load /Effort
A physical quantity that Scalar
has magnitude but no
direction
A quantity that has Vector
magnitude and direction
, Space Diagram
Illustrates a system of vectors
Vectors that are all in the Co-planar Vectors
same plane
Vectors whose lines of action Concurrent Vectors
meet at one point
A vector that represents Resultant
the sum of two or more
vectors
Atmospheric pressure + Absolute Pressure
gauge pressure
A friction force that acts on Static Friction
objects that are not moving.
Always greater than kinetic
friction
Friction that opposes Kinetic Friction
motion once the motion has
already started. Not
affected by speed of body
Always greater than rolling
friction.
The friction force that acts on Rolling Friction
rolling objects, Always less
than kinetic friction
Friction that occurs as an Fluid Friction
object moves through a fluid
, Force of Friction
Force that resists motion
when two materials are in
contact. Proportional to the
force that presses the two
surfaces together. Not
affected by area. Affected by
roughness.
The ability of a material to Elasticity
return to its original shape
after being disturbed
Ability of a material to resist Stiffness
a change in shape or size
when a load is applied
Ability of a material to retain Plasticity
its deformed shape when a
deforming force is
removed
Ability of a material to be Ductility
stretched and reduced in
cross section without
breaking
Ability of a material to Toughness
absorb energy before
breaking
Ability of a material to resist Hardness
penetration
Internal resistance to an Stress
external load , Equal to
Load (N) / Area (m^2)
Newest Actual Test Complete 630+ Questions
and Correct Detailed Answers
Terms in this set (637)
Change in position / time Velocity (m/s)
Change in velocity (m/s) / Acceleration (m/s^2)
time (s)
mass (kg) x accelerationForce (Newton)
(m/s^2) , any action on a body
that tends to change its size,
shape, or its state of rest or
motion
mass (kg) x 9.81 m/s^2 Force of Gravity
Force (N) / area (m^2) Pressure (Pa)
Force (N) x distance (m) Work (J)
Work done / time , Rate of Power
doing work
mass x gravity x height , the Potential Energy (J)
ability of a body to do work
due by virtue of its position
1/2 x mass x velocity^2 , The Kinetic Energy (J)
ability of a body to do work
due to its motion
The capacity of a body to do Energy (J)
work
,1000 kilograms Tonne
Force (N) x Distance (m) , A Moment of Force (Nm)
force, acting on a body at any
distance from a point on that
body, will tend to produce
rotation around that point
Equal to Counterclockwise Clockwise Moments
moments
Equal to Downward forces Upward Forces
Load (N) / Effort (N) Actual Mechanical Advantage (Ma)
Distance moved by Effort Velocity Ratio (VR)
/ Distance moved by Load
Output Work / Input Work Efficiency
Load x Distance moved by Output Work
load
Effort x Distance moved by Input Work
effort , Equals Output work
+ Wasted work
Equal to Velocity Ratio Ideal Mechanical Advantage (MA)
(VR)
Equal to Effort x R Load x r
Equal to R/r and D/d VR
Equal to R/r Load /Effort
A physical quantity that Scalar
has magnitude but no
direction
A quantity that has Vector
magnitude and direction
, Space Diagram
Illustrates a system of vectors
Vectors that are all in the Co-planar Vectors
same plane
Vectors whose lines of action Concurrent Vectors
meet at one point
A vector that represents Resultant
the sum of two or more
vectors
Atmospheric pressure + Absolute Pressure
gauge pressure
A friction force that acts on Static Friction
objects that are not moving.
Always greater than kinetic
friction
Friction that opposes Kinetic Friction
motion once the motion has
already started. Not
affected by speed of body
Always greater than rolling
friction.
The friction force that acts on Rolling Friction
rolling objects, Always less
than kinetic friction
Friction that occurs as an Fluid Friction
object moves through a fluid
, Force of Friction
Force that resists motion
when two materials are in
contact. Proportional to the
force that presses the two
surfaces together. Not
affected by area. Affected by
roughness.
The ability of a material to Elasticity
return to its original shape
after being disturbed
Ability of a material to resist Stiffness
a change in shape or size
when a load is applied
Ability of a material to retain Plasticity
its deformed shape when a
deforming force is
removed
Ability of a material to be Ductility
stretched and reduced in
cross section without
breaking
Ability of a material to Toughness
absorb energy before
breaking
Ability of a material to resist Hardness
penetration
Internal resistance to an Stress
external load , Equal to
Load (N) / Area (m^2)
