mass and stiffness
mass and damping coefficient
mass and natural frequency
damping coefficient an
✅ The correct answer is option A.
Mechanical Engineering MCQs
In a footstep bearing, if the speed of the shaft is doubled, then the torque required to overcome the viscous resistance will be
double
four times
eight times
sixteen times
✅ The correct answer is option A.
The secondary unbalanced force is maximum __________ in one revolution of the crank.
two times
four times
eight times
sixteen times
✅ The correct answer is option B.
In petrol engines, using a fixed octane rating fuel, the increase in compression ratio will not effect the knocking tendency.
Agree
Disagree
✅ The correct answer is option B.
The metal suitable for bearings subjected to light loads is
silicon bronze
white metal
monel metal
phosphor bronze
✅ The correct answer is option D.
The lip angle is the angle
between the tool face and the ground end surface of flank
made by the face of the tool and the plane parallel to the base of the cutting tool
between the face of the tool and a line tangent to the machined surface at the cutting point
none of the above
✅ The correct answer is option A.
The grinding wheel speed (surface speed in m/min) usually varies from
500 to 1000
1000 to 1500
1500 to 2000
2000 to 2500
✅ The correct answer is option C.
The ignition of the charge by some hot surface within the engine before the passage of spark is called
pre-ignition
detonation
ignition delay
auto-ignition
✅ The correct answer is option A.
Y-alloy contains
3.5 to 4.5% copper, 0.4 to 0.7% magnesium, 0.4 to 0.7% manganese and rest aluminium
3.5 to 4.5% copper, 1.2 to 1.7% manganese, 1.8 to 2.3% nickel, 0.6% each of silicon, magnesium and iron, and rest aluminium
4 to 4.5% magnesium, 3 to 4% copper and rest aluminium
5 to 6% tin, 2 to 3% c
✅ The correct answer is option B.
When the screw in a mechanical screw jack rotates, the load kept on the top of it moves
axially upwards
axially downwards
axially upwards or downwards
none of these
✅ The correct answer is option C.