Interview Questions.

Q1. Define Valve?

Valve is a Mechanical float manipulate detail inside the process.

Q2. What Is Ppe?

PPE- Personal Protective Equipment

E.G.) Helmet, Boiler Shout, Safety Goggles, Safety Shoe, Gloves, Dust Mask and so on...

Q3. What Is The Use Of Vacuum Breaker?

It is used to get rid of Vacuum (Air Bubbles) from Water line.

Q4. What Is Steam Trap And Gas Trap?

Steam trap the use of for removal of Water from Steam.

Gas lure the use of for elimination of water from gasoline.

Q5. What Is Flange? Types Of Flanges?

Flanges used to attach both strains (Fluid, Gas, Oil, Water….)

Thread Type Flange

Modified Flange

Weld Neck Flange

Slip On Flange

Goose Neck Flange

Socket Weld Flange

Stepped Flange

Spade Flange

Spectacle Flange

Blind Flange

Q6. What Are Prv And Psv?

PRV (Pressure Relief valve) release immoderate more than set factor, released fluid re circulated.

PSV (Pressure Safety Valve) released pressure more than set factor to secure the equipments.

Q7. What Are Types Of Valves?

Gate Valve

Globe Valve

Ball valve

Butterfly Valve

Needle Valve

Plug Valve

Diaphragm Valve

Non-Return Valve

Knife Edge Valve

Drain Valve

Float Valve

Flush Bottom Valve

Pinch Valve

Pen Stack Valve and so on.

Q8. What Are The Testing Mediums Used For Testing?

Water, DM Water, Air, Kerosene, Oil, Soap water.

Q9. What Is The Use Of Ejector?

Ejector is used to create Vacuum for system.

Q10. What Is Work Permit System?

Work Permit is an Authority for doing work in a technique plant.

Types:

Cold Work Permit- Without Sparking, Without Heat and so on.

Hot Work Permit- With warmness (Grinding, Cutting, Welding).

Note: Two times best make bigger the allow after the ordinary valid of permit.

Q11. What Is Gasket? Where It Is Used?

It is sealing member between two flanges.

Uses:

Water Line, Gas Line, Air Line used CAF Gasket.

RTJ – High Pressure Line.

Chemical Line – Rubber Gasket and Teflon Gasket.

Steam Line – Semi Metallic, Metallic and Graphite.

Impregnated Gasket – Valve Sealing Gasket.

Spiral Wound – Steam Line.

Q12. What Is The Use Of Spade, Spectacle, And Blind?

SPADE- Give space between two flanges and provide go with the flow through the spade.

SPECTACLE – Combination of SPADE and BLIND and both option carried out in a single flange.

BLIND – Used for close the road.

Q13. Explain The Valve Parts?

Gate Valve – Body, Bonnet, Seat, Gate, Stem, Hand Wheel, Gland Bush, Gland Flange, Gland Bolt and Nuts. Hand Wheel lock nut.

Ball Valve – Body , End Piece , Ball , Stem , Seal , Seal Follower , Seat , Lock Nut , Handle Gland Packing , Gland Flange , Gland Stud and nut.

Globe Valve – Body , Bonnet , Seat , Plug , stem ,  Hand Wheel , Lock Nut ,Gland Packing , Gland Flange , Gland Stud and nut.

Butterfly – Body , Disc , Stem , Seat ring , Seat ring holder , Bush , End cover , Hand Wheel  or Gear Box , Gland Bush , Gland Packing , Gland Flange , Gland Stud and nut.

Q14. What Is Strainer?

Strainer is a control element to arrest dirt from flowing fluids.

Q15. What Are The Types Of Gaskets?

CAF – Compressed Asbestos Fiber Filled Gasket

Semi Metallic Gasket 

Metallic Gasket

Rubber Gasket

Teflon Gasket

Spiral Wound Gasket

RTJ – Ring Type Joint

Graphite Gasket

Impregnated Gasket

Graf oil Gasket

Q16. What Is Gland Packing? Uses Of Gland Packing?

Gland packing is a Sealing member among  moving parts or stationary.

It is used for arrest the leak through shaft diverse traces.

Teflon Gland packing

Graphite Gland packing

Carbon Gland packing

Virgin PTFE Gland packing

Graf oil Gland packing

Q17. What Is Heat Exchanger? What Are The Types Of Heat Exchanger?

It is an Equipment to use for Exchange the warmth(Cooling or Heating reason)

Types:

Fixed Tube Heat Exchanger

Floating Tube Heat Exchanger

U Tube Exchanger

Plate Type Exchanger

Fin Fan Cooler Heat Exchanger

Bridge Lock Exchanger

Q18. Define Non Sparking Tools?

Non Sparking tools utilized in Gas, Oil and Chemicals.

E.G. Brass hammer, Brass Wedge, Brass Spanner, Copper hammer, Copper rod , Brass rod , Brass chisel  , Rubber hammer , Nylon hammer.

Q19. Explain The Following Valves Shell And Seat Testing?

Ball Valve

Gate Valve

Globe Valve

Butterfly valve

Plug valve

Shell Test of above valves:- 

             Testing flange to be constant on both aspects. Pressurized one aspect under the valve partial open circumstance as per the standard. Check the leakage thru body, Bonnet sealing place, Gland packing area.

Seat Test of above valves:-

            Testing flange to be restoration on one aspect of the valve. Pressurized the valve below completely closed circumstance as in step with the standard. Check the leakage via Seat in opposite side. Follow the equal process whilst checking the some other seat besides Globe and Butterfly.

Q20. Give The Parts Name Of Psv?

Body

Bonnet

Nozzle

Disc

Disc Holder

Stem

Blow down ring

Blow down ring lock screw

Spring Bottom Plate

Spring

Spring Top Plate

Control Screw

Lock Nut

Cap

Gasket