Power Engineering 4th Class Part A Exam – Verified Test Bank with Correct Answers for Canadian Certification

4th Class Power Engineering Part A Exam with verified answers




Velocity (m/s) - CORRECT ANSWER✔✔Change in position / time


Acceleration (m/s^2) - CORRECT ANSWER✔✔Change in velocity (m/s) / time (s)


Force (Newton) - CORRECT ANSWER✔✔mass (kg) x acceleration (m/s^2) , any
action on a body that tends to change its size, shape, or its state of rest or motion


Force of Gravity - CORRECT ANSWER✔✔mass (kg) x 9.81 m/s^2


Pressure (Pa) - CORRECT ANSWER✔✔Force (N) / area (m^2)


Work (J) - CORRECT ANSWER✔✔Force (N) x distance (m)


Power - CORRECT ANSWER✔✔Work done / time , Rate of doing work


Potential Energy (J) - CORRECT ANSWER✔✔mass x gravity x height , the ability of
a body to do work due by virtue of its position


Kinetic Energy (J) - CORRECT ANSWER✔✔1/2 x mass x velocity^2 , The ability of a
body to do work due to its motion

,Energy (J) - CORRECT ANSWER✔✔The capacity of a body to do work


Tonne - CORRECT ANSWER✔✔1000 kilograms


Moment of Force (Nm) - CORRECT ANSWER✔✔Force (N) x Distance (m) , A force,
acting on a body at any distance from a point on that body, will tend to produce
rotation around that point


Clockwise Moments - CORRECT ANSWER✔✔Equal to Counter-clockwise
moments


Upward Forces - CORRECT ANSWER✔✔Equal to Downward forces


Actual Mechanical Advantage (Ma) - CORRECT ANSWER✔✔Load (N) / Effort (N)


Velocity Ratio (VR) - CORRECT ANSWER✔✔Distance moved by Effort / Distance
moved by Load


Efficiency - CORRECT ANSWER✔✔Output Work / Input Work


Output Work - CORRECT ANSWER✔✔Load x Distance moved by load


Input Work - CORRECT ANSWER✔✔Effort x Distance moved by effort , Equals
Output work + Wasted work

,Ideal Mechanical Advantage (MA) - CORRECT ANSWER✔✔Equal to Velocity Ratio
(VR)


Load x r - CORRECT ANSWER✔✔Equal to Effort x R


VR - CORRECT ANSWER✔✔Equal to R/r and D/d


Load /Effort - CORRECT ANSWER✔✔Equal to R/r


Scalar - CORRECT ANSWER✔✔A physical quantity that has magnitude but no
direction


Vector - CORRECT ANSWER✔✔A quantity that has magnitude and direction


Space Diagram - CORRECT ANSWER✔✔Illustrates a system of vectors


Co-planar Vectors - CORRECT ANSWER✔✔Vectors that are all in the same plane


Concurrent Vectors - CORRECT ANSWER✔✔Vectors whose lines of action meet at
one point


Resultant - CORRECT ANSWER✔✔A vector that represents the sum of two or
more vectors

, Absolute Pressure - CORRECT ANSWER✔✔Atmospheric pressure + gauge
pressure


Static Friction - CORRECT ANSWER✔✔A friction force that acts on objects that are
not moving. Always greater than kinetic friction


Kinetic Friction - CORRECT ANSWER✔✔Friction that opposes motion once the
motion has already started. Not affected by speed of body Always greater than
rolling friction.


Rolling Friction - CORRECT ANSWER✔✔The friction force that acts on rolling
objects, Always less than kinetic friction


Fluid Friction - CORRECT ANSWER✔✔Friction that occurs as an object moves
through a fluid


Force of Friction - CORRECT ANSWER✔✔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.


Elasticity - CORRECT ANSWER✔✔The ability of a material to return to its original
shape after being disturbed


Stiffness - CORRECT ANSWER✔✔Ability of a material to resist a change in shape
or size when a load is applied