Metenere Mechanical Maintenance Engineer Interview Questions, Process, and Tips for Experienced

There are various types of seals used in hydraulics and pneumatic systems.

• O-rings: commonly used in both hydraulic and pneumatic systems

• Piston seals: used to prevent fluid leakage in hydraulic systems

• Rod seals: used to prevent fluid leakage in hydraulic systems

• Wiper seals: used to prevent contaminants from entering hydraulic or pneumatic systems

• Rotary seals: used in rotary applications to prevent fluid leakage

• V-ring se...read more

Types of gears include spur gears, helical gears, bevel gears, worm gears, and rack and pinion gears.

• Spur gears have straight teeth and are used in applications with low speed and high torque.

• Helical gears have angled teeth and provide smoother and quieter operation.

• Bevel gears have cone-shaped teeth and are used to transmit power between intersecting shafts.

• Worm gears consist of a worm and a worm wheel and are used fo...read more

Types of pumps include centrifugal pumps, reciprocating pumps, and rotary pumps.

• Centrifugal pumps use centrifugal force to move fluid through a rotating impeller.

• Reciprocating pumps use a piston or diaphragm to create pressure and move fluid.

• Rotary pumps use rotating mechanisms to transfer fluid, such as gear pumps or vane pumps.

I have worked with various types of machines including pumps, compressors, turbines, and conveyors.

• Pumps: Centrifugal pumps, reciprocating pumps

• Compressors: Reciprocating compressors, rotary screw compressors

• Turbines: Steam turbines, gas turbines

• Conveyors: Belt conveyors, screw conveyors

There are various types of hydraulic valves used in different applications.

• Directional control valves: used to control the direction of fluid flow in a hydraulic system.

• Pressure control valves: used to regulate the pressure of the hydraulic fluid.

• Flow control valves: used to control the flow rate of the hydraulic fluid.

• Check valves: used to allow fluid flow in one direction and prevent backflow.

• Relief valves: used to p...read more

Types of bearings include ball bearings, roller bearings, plain bearings, and fluid bearings.

• Ball bearings: use balls to reduce friction and support radial and axial loads

• Roller bearings: use cylindrical or tapered rollers to support heavy loads

• Plain bearings: use a sliding surface to support loads

• Fluid bearings: use a thin layer of fluid to support loads and reduce friction

Units of pressure include pascal, bar, atmosphere, and psi.

• Pascal (Pa) is the SI unit of pressure.

• Bar is a unit of pressure commonly used in Europe.

• Atmosphere (atm) is a unit of pressure commonly used in meteorology.

• Psi (pound per square inch) is a unit of pressure commonly used in the United States.

• Other units of pressure include torr, millimeter of mercury (mmHg), and kilopascal (kPa).