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Common Interview questions for mechanical engineer

Interview questions for mechanical engineer

How many types of pumps?

Classification of pump

  • Positive displacement pump
  • Centrifugal pump (Dynamic pump)

How many types of compressors?

 types of compressors mentioned below

  • Rotary Screw Compressor.
  • Reciprocating Air Compressors.
  • Axial Compressor.
  • Centrifugal Compressor.

How many types of valves are used in industries?

  1. Gate valve
  2. Ball valve
  3. Butterfly valve
  4. Pressure relief
  5. Valve Pressure
  6. safety valve
  7. Needle valve
  8. Pinch valve
  9. Plug valve
  10. Globe valve

How many types of blowers?

  1. Centrifugal blower
  2. Positive displacement blower
  3. Helical screw blower
  4. High-speed blower

How many types of fans?

API standard for fans   (API STD 673)
  1. Centrifugal fan 
  2. Axial fan

How many types of columns?

How many types of internal materials are used in columns?

Columns internal materials are classified as follows.

  1. Structured Packing
  2. Random Packing
  3. Trays (Plates)

Trays (Plates)

  • Bubble cap trays
  • Sieve trays
  • Valve trays

What is a heat exchanger?

The heat exchanger is a device that is used to transfer heat from one medium to another, For example, Hydraulic Oil Cooler removes heat from hot oil by using cold water (Shell and tubes) or air. Alternatively. Heat is transferred by conduction through the exchanger materials which separate the mediums being used. A shell and tube heat exchanger passes fluids through and over tubes, whereas an air-cooled heat exchanger passes cool air through a core of fins to cool a liquid.

How many types of heat exchangers?

The heat exchanger is classified into three types according to its construction and working, these are the following.

  1. Shell and tubes
  2. Plates types heat exchanger
  3. Air-cooled types heat exchanger

How many types of gaskets are used in piping and equipment?

There are many types of gaskets are used in piping and equipment their classification as below.

  1. Non-metallic Gaskets (Non-asbestos types include aramid fiber, glass fiber, elastomer, Teflon (PTFE), and flexible graphite gaskets)
  2. Semi-metallic or Composite Gaskets (semi-metallic gaskets are spiral wound, metal jacketed, Cam profile, and a variety of metal-reinforced graphite gaskets)
  3. Metallic Gaskets (Spiral-wound Gasket, Corrugated-metal Gaskets, Serrated Metal gasket, Ring-Joint Gaskets)

Types of gaskets

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