Heg pvt Mandeep Maintenance Engineer Interview Questions and Answers for Freshers

Reynolds number is a dimensionless quantity used to predict fluid flow patterns and turbulence.

• It is used to determine whether a fluid flow is laminar or turbulent

• It is calculated using the fluid velocity, density, viscosity, and characteristic length

• Higher Reynolds number indicates turbulent flow while lower indicates laminar flow

• It is named after Osborne Reynolds, a British physicist who first described it in 1883

The second law of thermodynamics states that the total entropy of a closed system will always increase over time. The third law states that it is impossible to reach absolute zero temperature.

• 2nd law: entropy always increases in a closed system

• 3rd law: absolute zero temperature is impossible to reach

• 2nd law explains why perpetual motion machines are impossible

• 3rd law is used to calculate the entropy of a substance at a...read more

A crankshaft is a mechanical component that converts the reciprocating motion of the pistons into rotational motion.

• A crankshaft consists of a main journal, crankpin, and counterweights.

• The main journal is the central shaft that connects to the engine block.

• The crankpin connects the main journal to the connecting rod.

• The counterweights are designed to offset the weight of the rod and piston.

• The shape of the crankshaft ...read more