Mechanical Engineering Quiz

What is the difference between PRV and PSV?

7. Sealed Bearings:
A sealed bearing is mainly used to:
A) Prevent entry of contaminants and retain lubricant
B) Increase bearing diameter
C) Increase load capacity
D) Reduce noise only

1. Bearing Basics:
Which type of bearing is mainly used to support radial loads only?
A) Ball Bearing
B) Roller Bearing
C) Thrust Bearing
D) Journal Bearing

Q4. Theory of Machines
A flywheel stores 2000 J of energy when its speed changes from 210 rpm to 190 rpm.
Find the moment of inertia (I) of the flywheel.

Q3. Fluid Mechanics
Water flows through a pipe of diameter 0.1 m with velocity 4 m/s.
Find the Reynolds number if kinematic viscosity (ν) = 1 × 10⁻⁶ m²/s.

Q2. In a four-stroke petrol engine, which stroke involves the spark plug firing?
a) Intake stroke
b) Compression stroke
c) Power stroke
d) Exhaust stroke