4th Class Power Engineering Part A Exam
Q & As (Verified Answers) 2026
Velocity (m/s) - Correct Answers ✅Change in position /
time
Acceleration (m/s^2) - Correct Answers ✅Change in
velocity (m/s) / time (s)
Force (Newton) - Correct Answers ✅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 Answers ✅mass (kg) x 9.81
m/s^2
Pressure (Pa) - Correct Answers ✅Force (N) / area (m^2)
Work (J) - Correct Answers ✅Force (N) x distance (m)
Power - Correct Answers ✅Work done / time , Rate of doing
work
Potential Energy (J) - Correct Answers ✅mass x gravity x
height , the ability of a body to do work due by virtue of its
position
,4th Class Power Engineering Part A Exam
Q & As (Verified Answers) 2026
Kinetic Energy (J) - Correct Answers ✅1/2 x mass x
velocity^2 , The ability of a body to do work due to its motion
Energy (J) - Correct Answers ✅The capacity of a body to do
work
Tonne - Correct Answers ✅1000 kilograms
Moment of Force (Nm) - Correct Answers ✅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 Answers ✅Equal to Counter-
clockwise moments
Upward Forces - Correct Answers ✅Equal to Downward
forces
Actual Mechanical Advantage (Ma) - Correct Answers
✅Load (N) / Effort (N)
Velocity Ratio (VR) - Correct Answers ✅Distance moved by
Effort / Distance moved by Load
,4th Class Power Engineering Part A Exam
Q & As (Verified Answers) 2026
Efficiency - Correct Answers ✅Output Work / Input Work
Output Work - Correct Answers ✅Load x Distance moved
by load
Input Work - Correct Answers ✅Effort x Distance moved by
effort , Equals Output work + Wasted work
Ideal Mechanical Advantage (MA) - Correct Answers
✅Equal to Velocity Ratio (VR)
Load x r - Correct Answers ✅Equal to Effort x R
VR - Correct Answers ✅Equal to R/r and D/d
Load /Effort - Correct Answers ✅Equal to R/r
Scalar - Correct Answers ✅A physical quantity that has
magnitude but no direction
Vector - Correct Answers ✅A quantity that has magnitude
and direction
, 4th Class Power Engineering Part A Exam
Q & As (Verified Answers) 2026
Space Diagram - Correct Answers ✅Illustrates a system of
vectors
Co-planar Vectors - Correct Answers ✅Vectors that are all
in the same plane
Concurrent Vectors - Correct Answers ✅Vectors whose
lines of action meet at one point
Resultant - Correct Answers ✅A vector that represents the
sum of two or more vectors
Absolute Pressure - Correct Answers ✅Atmospheric
pressure + gauge pressure
Static Friction - Correct Answers ✅A friction force that acts
on objects that are not moving. Always greater than kinetic
friction
Kinetic Friction - Correct Answers ✅Friction that opposes
motion once the motion has already started. Not affected by
speed of body Always greater than rolling friction.
Rolling Friction - Correct Answers ✅The friction force that
acts on rolling objects, Always less than kinetic friction
Q & As (Verified Answers) 2026
Velocity (m/s) - Correct Answers ✅Change in position /
time
Acceleration (m/s^2) - Correct Answers ✅Change in
velocity (m/s) / time (s)
Force (Newton) - Correct Answers ✅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 Answers ✅mass (kg) x 9.81
m/s^2
Pressure (Pa) - Correct Answers ✅Force (N) / area (m^2)
Work (J) - Correct Answers ✅Force (N) x distance (m)
Power - Correct Answers ✅Work done / time , Rate of doing
work
Potential Energy (J) - Correct Answers ✅mass x gravity x
height , the ability of a body to do work due by virtue of its
position
,4th Class Power Engineering Part A Exam
Q & As (Verified Answers) 2026
Kinetic Energy (J) - Correct Answers ✅1/2 x mass x
velocity^2 , The ability of a body to do work due to its motion
Energy (J) - Correct Answers ✅The capacity of a body to do
work
Tonne - Correct Answers ✅1000 kilograms
Moment of Force (Nm) - Correct Answers ✅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 Answers ✅Equal to Counter-
clockwise moments
Upward Forces - Correct Answers ✅Equal to Downward
forces
Actual Mechanical Advantage (Ma) - Correct Answers
✅Load (N) / Effort (N)
Velocity Ratio (VR) - Correct Answers ✅Distance moved by
Effort / Distance moved by Load
,4th Class Power Engineering Part A Exam
Q & As (Verified Answers) 2026
Efficiency - Correct Answers ✅Output Work / Input Work
Output Work - Correct Answers ✅Load x Distance moved
by load
Input Work - Correct Answers ✅Effort x Distance moved by
effort , Equals Output work + Wasted work
Ideal Mechanical Advantage (MA) - Correct Answers
✅Equal to Velocity Ratio (VR)
Load x r - Correct Answers ✅Equal to Effort x R
VR - Correct Answers ✅Equal to R/r and D/d
Load /Effort - Correct Answers ✅Equal to R/r
Scalar - Correct Answers ✅A physical quantity that has
magnitude but no direction
Vector - Correct Answers ✅A quantity that has magnitude
and direction
, 4th Class Power Engineering Part A Exam
Q & As (Verified Answers) 2026
Space Diagram - Correct Answers ✅Illustrates a system of
vectors
Co-planar Vectors - Correct Answers ✅Vectors that are all
in the same plane
Concurrent Vectors - Correct Answers ✅Vectors whose
lines of action meet at one point
Resultant - Correct Answers ✅A vector that represents the
sum of two or more vectors
Absolute Pressure - Correct Answers ✅Atmospheric
pressure + gauge pressure
Static Friction - Correct Answers ✅A friction force that acts
on objects that are not moving. Always greater than kinetic
friction
Kinetic Friction - Correct Answers ✅Friction that opposes
motion once the motion has already started. Not affected by
speed of body Always greater than rolling friction.
Rolling Friction - Correct Answers ✅The friction force that
acts on rolling objects, Always less than kinetic friction
