4th Class Power Engineering Part A Exam 2026 | Study Guide & Practice Questions

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4th Class Power Engineering Part A Exam (NEW UPDATED VERSION)
LATEST ACTUAL EXAM QUESTIONS AND CORRECT ANSWERS (VERIFIED
QUESTIONS AND ANSWERS)- GUARANTEED PASS A+ UPDATED 2026




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


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


QUESTION : 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


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


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


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


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




2026 2027 GRADED A+

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


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


QUESTION : Energy (J) - CORRECT ANSWER The capacity of a body to
do work


QUESTION : Tonne - CORRECT ANSWER 1000 kilograms


QUESTION : 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


QUESTION : Clockwise Moments - CORRECT ANSWER Equal to
Counter-clockwise moments


QUESTION : Upward Forces - CORRECT ANSWER Equal to Downward
forces


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


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


2026 2027 GRADED A+

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QUESTION : Efficiency - CORRECT ANSWER Output Work / Input Work


QUESTION : Output Work - CORRECT ANSWER Load x Distance moved
by load


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


QUESTION : Ideal Mechanical Advantage (MA) - CORRECT ANSWER
Equal to Velocity Ratio (VR)


QUESTION : Load x r - CORRECT ANSWER Equal to Effort x R


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


QUESTION : Load /Effort - CORRECT ANSWER Equal to R/r


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


QUESTION : Vector - CORRECT ANSWER A quantity that has
magnitude and direction




2026 2027 GRADED A+

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QUESTION : Space Diagram - CORRECT ANSWER Illustrates a system
of vectors


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


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


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


QUESTION : Absolute Pressure - CORRECT ANSWER Atmospheric
pressure + gauge pressure


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


QUESTION : 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.


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




2026 2027 GRADED A+