Interview Questions.

Question 1. What Are The Process Variable?

Answer :

The method Variable are:

Flow
Pressure
Temperature
Level
Quality i. E. % D2, C02, PH and so on.
Question 2. Define All The Process Variable And State Their Unit Of Measurement?

Answer :

FLOW: Kg I hr, Litter I min, Gallon I min. M3 I NM3 I HR. (GASES)
PRESSURE: Force performing per unit Area. P = F/A Units: Bar I Pascals I Kg I CM I, Pounds
LEVEL: Different between two heights. Units: Meters, M M, C M, %.
TEMPERATURE: It is the diploma of hotness or coldness of a frame. Units : Degree Centigrade, Degree Farenheit, Degree Kelvin, Degree Rankin.
QUALITY: It deals with analysis PH, % C02, % 02, Conductivity, Viscosity.
Industrial Interview Questions
Question 3. What Are The Primary Elements Usedfor Flow Measurement?

Answer :

The primary factors used for drift dimension are:

Orifice Plate.
Venturi tube.
Pitot tube.
Annubars.
Flow Nozzle.
Weir & Flumes.
Question four. What Are The Different Types Of Orifice Plates And State Their Uses?

Answer :

The distinct styles of orifice plates are:

Concentric.
Segmental.
Eccentric.
CONCENTRIC: The concentric orifice plate is used for best liquid in addition to gases and steam service. This orifice as a hole in concentric and for this reason referred to as concentric orifice.

Eccentric & Segmental: The eccentric orifice plate has a hollow eccentric. The use that is made in viscous and sherry float measurement.

The segmental orifice region has the hollow within the shape phase of a circle. This is used for colloidal and sherry glide measurement.

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Question five. How Do You Identify An Orifice In The Pipe Line?

Answer :

An orifice tab is welded at the orifice plate which extends our of the road giving an illustration of the orifice plate.

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Question 6. Why Is The Orifice Tab Provided?

Answer :

The orifice tab is furnished due to the following motives:

Indication of an orifice plate in a line.
The orifice diameter is marked on it.
The fabric of the orifice plate.
The tag no. Of the orifice plate.
The mark the inlet of an orifice.
Question 7. What Is Bernoulli’s Theoram And Where It Is Applicable?

Answer :

Bernoulli’s theoram states the “total power of a liquid flowing from one point to every other stays constant.” It is applicable for non compressible liquids.

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Question eight. How Do You Identify The H. P. Side Or Inlet Of An Orifice Plate In Line?

Answer :

The marking is usually completed H. P. Facet of the orifice tab which offers an illustration of the H.P.Side.

Question 9. How Do You Calibrate A D. P. Transmitter?

Answer :

The following steps are to be taken which claribrating :

Adjust 0 of the Xmtrs.
Static preasure take a look at: Give same stress on each aspects of the transmitter. Zero have to no longer shift. If it's miles moving perform static alignment.
Vaccum test: Apply same vaccum to each the sides. The zero should not shift.
Calibration Procedure:

Give 20 psi air supply to the transmitter.
Vent the L.P. Side to environment.
Connect output of the Instrument to a preferred check gauge. Adjust 0.
Apply required pressure to excessive stress facet of the transmitter and regulate the span.
Adjust zero again if essential.
Process Control and Instrumentation Interview Questions
Question 10. What Is The Seal Liquid Used For Filling Impulse Lines On Crude And Viscous Liquid?

Answer :

Glycol.

Question eleven. How Do You Carry Out Piping For A Different Pressure Flow Transmitter On Liquids, Gas And Steam Services? Why?

Answer :

Liquid lines: On liquid strains the transmitter is mounted under the orifice plate. Since drinks have a property of self draining.

Gas Service: On gasoline provider the transmitter is established above the orifice plate due to the fact Gases have a property of self venting and secondly condenlate formation.

Steam Service: On steam service the transmitter is set up below the orifice plate with condenlate pots. The pots must be at the equal level.

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Question 12. An Operator Tells You That Flow Indication Is More? How Would You Start Checking?

Answer :

First flushing the transmitter. Flush both the impulse traces. Adjust the zero by using equalizing if necessary. If still the indication is greater then.
Check L.P. Aspect for choke. If this is smooth then.
Check the leaks on L.P. Aspect. If now not.
Calibrate the transmitter.
Industrial Interview Questions
Question 13. How Do You Do A Zero Check On A D.P. Transmitter?

Answer :

Close one of the valve both H.P. Or L.P. Open the equalizing valve. The O/P need to study 0.

Question 14. How Would You Do Glycol Filling Or Fill Seal Liquids In Seal Pots 7 Draw And Explain?

Answer :

The process for glycol filling is :

Close the number one isolation valves.
Open the vent at the seal pots.
Drain the use glycol if present.
Connect a hand pump on L.P. Side while filling the H.P. Side with glycol.
Keep the equalizer valve open.
Keep the L.P. Aspect valve closed.
Start pumping and fill glycol.
Same repeat for L.P. Side by means of connecting pump to H.P. Facet, maintaining equalizer open and H.P. Aspect isolation valve closed.
Close the seal pot vent valves.
Close equalizer valve.
Open each the primary isolation valves.
Question 15. How Do You Calculate New Factor From New Range Using Old Factor And Old Range?

Answer :

New Factor = _!New Range Old Factor = _IOld Range Flow = K_!Range

Q = Factor X Unit Flow

New Factor = Old Factor I _IOld Range X _/New Range.

Industrial control Interview Questions
Question 16. How Will You Vent Air In The D.P. Cell? What If Seal Pots Are Used?

Answer :

Air is vented by using commencing the vent plugs on a liquid carrier transmitter.
On offerings where seal pots are used isolate the primary isolation valves and open the vent valves. Fill the road from the transmitter drain plug with a pump.
Question 17. Why Is Flow Measured In Square Root?

Answer :

Flow varies directly as the square root of various strain F = K square root of ΔP.
Since this go with the flow varies as the square root of differential stress the pen does now not immediately indicate glide.
The drift may be decided via taking the square root of the pen. Say the pen reads 50% of chart.
Manufacturing Industrial Engineer Interview Questions