# Mechanical Engineering Questions

Mechanical Engineering Questions

## What is Archimedes principle

Archimedes principle is a physical law of buoyancy which states that a body, wholly or partly immersed in a fluid, experiences an upthrust (the buoyancy force or apparent loss of weight) equal to the weight of the fluid displaced.

## What do you mean by term consolute temperature

Convolute temperature refers to the temperature at which two partially miscible liquids become fully miscible.

## Define isobaric process

The isobaric process is defined as a thermodynamic process that is carried out at constant pressure.

## What do you mean by annealing in metal alloys

Annealing is defined as the heat treatment process that involve altering of the microstructure of materials to bring a change in its mechanical or electrical properties. Annealing in alloys is defined as process of restoring ductility and lowering the strength of cold-worked components and is carried by heating above the recrystallization temperature and cooling slowly.

## What are different types of fits in Mechanical Engineering

Three types of fits are there in Mechanical Engineering

1. Clearance Fit: Clearance fit is used in situations that require loose mating and components free movement.
2. Interference Fit: Interference fit, also called as press fit or friction fit is defined as fastening of two components by pushing them together.
3. Transition Fit: These fits lie between clearance and interference fits and are recommended for situations in which accuracy is very important.

## What does ABS signifies in Motor Vehicle Engineering

ABS stand for anti-lock braking system and it signifies sensor-controlled brakes on a motor vehicle that prevent wheel lockup during braking.

## What do you mean by octane scale in fuels, specify components with 100 and 0 Octane number

The octane scale is an arbitrary scale for the octane rating.

• Iso-octane is given an octane number of 100
• Heptane is given octane number of zero

## What is open-loop control system

Open-loop control system is defined as a control system where the input applied to the plant is independent of the plant output.

## What is Bénard convection

Bénard convection is a form of natural convection ascending as a result of thermocapillary instability, in which horizontal counter-rotating vortices occur in a thin layer of liquid heated from below.

## What is a Damper

A sliding or hinged plate for controlling the draught through a furnace