Mechanical Interview Questions and Answers

A turbine is a machine or a rotary mechanical device which is used for the extraction of the energy from the flowing fluid and then converting to be used into useful work. The working of the simple principle is with the help of the three propellers like blade around the rotors. These are to be connected to the main shaft which then spun the generator producing elasticity.

A compressor is a machine that is used to give rise to the pressure of a gas minimizing the volume of the gas. It is a mechanical device which works as similar to that of pumps. One of the gas compressors is an air compressor.

Types of a compressor-

• Positive Displacement
• Rotary
• Reciprocating
• Dynamic
• Centrifugal
• Axial

Sleeve and cotter joint are used for connecting two similar coaxial cylindrical rods. The name so because the joint contains sleeve and two wedge-shaped tapered cotters. Also, there has been a cut in the cylindrical rods and sleeve. The next step is cotter assembling into the slots.

The gear ratio is calculated by simply dividing the teeth on the driven gear by the number of teeth on the driver gear.

The transition of the ductile to brittle transition temperature depends on the composition of the metal. One of the examples of the temperature transition is steel. It is because of the drop in the temperature to 00 C

Flow Characteristics are used for describing the relationship between the value stroke and value coefficient. It is a parameter which every throttling valve contains. It is also used for allowing a certain amount of flow via the valve. The rate of the particular percentage of the stroke is decided by the flow characteristic. In addition to this, it allows having control of the flow of the valve, an important factor for the throttling value and that in a predictable manner. Learn the basic concept of flow characteristic and work to crack the Mechanical engineering Interview Questions.

Centrifugal Pump has the following attributes as compared to reciprocating pumps-

• It is simpler than it due to inlet and outlet and an impeller
• Smooth rotation of the impeller in the centrifugal pump
• Requires less floor space and capacity
• Easy and quick installation and maintenance

An impulse reaction turbine is used for generating a high speed of the jet of water by converting the pressure of energy into kinetic energy through a nozzle. After that, the water jet strikes the turbine’s blades and then starts rotating it. One more characteristic is that there is a change in the pressure of the water when it passes the turbine.

Hydraulic machines are the tools and the machines that utilize the fluid power of liquid for taking the required actions. This is the fluid which is used in heavy equipment as well as other types of medium. The fluid gets the pressure as per the resistance present after its transmission throughout the machine to other hydraulic cylinders and hydraulic motors.

Pneumatic machines are used for applying the fluid power by using a gaseous media under pressure for controlling, generating and transmitting the power with the help of compressed gas.

Advantages of Belt Drive-

• No requirement of the parallel shifts
• Simpler to use
• Very economical
• Lubrication-free
• Needless maintenance
• Damping out of noise and vibration