4th Class Power Engineering Part A Exam Questions With Correct Verified solutions

4th Class Power Engineering Part A Exam Questions With Correct Verified solutions Velocity (m/s) - ANS Change in position / time Acceleration (m/s^2) - ANS Change in velocity (m/s) / time (s) Force (Newton) - ANS 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 - ANS mass (kg) x 9.81 m/s^2 Pressure (Pa) - ANS Force (N) / area (m^2) Work (J) - ANS Force (N) x distance (m) Power - ANS Work done / time , Rate of doing work Potential Energy (J) - ANS mass x gravity x height , the ability of a body to do work due by virtue of its position Kinetic Energy (J) - ANS 1/2 x mass x velocity^2 , The ability of a body to do work due to its motion Energy (J) - ANS The capacity of a body to do work Tonne - ANS 1000 kilograms Moment of Force (Nm) - ANS 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 - ANS Equal to Counter-clockwise moments Upward Forces - ANS Equal to Downward forces Actual Mechanical Advantage (Ma) - ANS Load (N) / Effort (N) Velocity Ratio (VR) - ANS Distance moved by Effort / Distance moved by Load Efficiency - ANS Output Work / Input Work Output Work - ANS Load x Distance moved by load Input Work - ANS Effort x Distance moved by effort , Equals Output work + Wasted work Ideal Mechanical Advantage (MA) - ANS Equal to Velocity Ratio (VR) Load x r - ANS Equal to Effort x R VR - ANS Equal to R/r and D/d Load /Effort - ANS Equal to R/r Scalar - ANS A physical quantity that has magnitude but no direction Vector - ANS A quantity that has magnitude and direction Space Diagram - ANS Illustrates a system of vecto