How do you identify an orifice in the pipe line?

How do you identify an orifice in the pipe line?
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1 Answer

Answer :

An orifice tab is welded on the orifice plate which extends outer of the line giving an indication of the orifice plate.
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Related questions

How do you identify the H. P. side or inlet of an orifice plate in line?

Description : How do you identify the H. P. side or inlet of an orifice plate in line?

Last Answer : The marking is always done H. P. side of the orifice tab which gives an indication of the H. P. side.

Why is the orifice tab provided?

Description : Why is the orifice tab provided?

Last Answer : The orifice tab is provided due to the following reasons. Indication of an orifice plate in a line. The orifice diameter is marked on it. The material of the orifice ... differential pressure generated Exhaustive data available Low purchase price and installation cost Easy replacement

What are the different types of orifice plates and state their uses ?

Description : What are the different types of orifice plates and state their uses ?

Last Answer : The different types of orifice plates are : • Concentric. • Segmental. • Eccentric. • Quadrant Edge.

How Do You Identify An Orifice In The Pipe Line?

Description : How Do You Identify An Orifice In The Pipe Line?

Last Answer : An orifice tab is welded on the orifice plate which extends our of the line giving an indication of the orifice plate.

How will you check zero of a level D.P. transmitter while is line ?

Description : How will you check zero of a level D.P. transmitter while is line ? 

Last Answer : ١. Close both the isolation valves. ٢. Open the vent valve on L.P. leg and H.P. leg drain. ٣. Check and adjust zero if necessary. 

What will happen if the displacer has a hole in it while in line ?

Description : What will happen if the displacer has a hole in it while in line ?  

Last Answer : The output will be minimum. 

What will happen if the displacer has fallen down while in line ?

Description : What will happen if the displacer has fallen down while in line ?

Last Answer : The output will be maximum. 

Type of power-line frequency meter composed of vibrating iron reed placed in alternating magnetic field

Description : Type of power-line frequency meter composed of vibrating iron reed placed in alternating magnetic field

Last Answer : Vibrating Reed Type

This is a method of using a Wheatstone brdige to determine the distance from the test point to a fault in a telephone or telegraph line or cable.

Description : This is a method of using a Wheatstone brdige to determine the distance from the test point to a fault in a telephone or telegraph line or cable.

Last Answer : varmeter/reactive VA meter

Type of power-line frequency meter device utilizing a principle of balancing an indicator needle at center of a scale using magnetic fields opposing each other.

Description : Type of power-line frequency meter device utilizing a principle of balancing an indicator needle at center of a scale using magnetic fields opposing each other.

Last Answer : magnetic type

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

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

Last Answer : The marking is always done H. P. side of the orifice tab which gives an indication of the H.P.side.

Location of vena-contracta in an orificemeter does not depend upon the (A) Type of orifice (B) Density, viscosity & compressibility of the fluid (C) Ratio of pipe diameter to orifice diameter (D) Pipe roughness

Description : Location of vena-contracta in an orificemeter does not depend upon the (A) Type of orifice (B) Density, viscosity & compressibility of the fluid (C) Ratio of pipe diameter to orifice diameter (D) Pipe roughness

Last Answer : (A) Type of orifice

The discharge co-efficient for an orifice meter does not depend upon the (A) Pipe length (B) Ratio of pipe diameter to orifice diameter (C) Type of orifice & the Reynolds number (D) Pipe diameter

Description : The discharge co-efficient for an orifice meter does not depend upon the (A) Pipe length (B) Ratio of pipe diameter to orifice diameter (C) Type of orifice & the Reynolds number (D) Pipe diameter

Last Answer : (A) Pipe length

For a given Reynold number as d/D for an orifice increases, Cd will (where, d & D are orifice & pipe diameters respectively). (A) Increase (B) Decrease (C) Remain constant (D) Either (A) or (B); depends on other factors

Description : For a given Reynold number as d/D for an orifice increases, Cd will (where, d & D are orifice & pipe diameters respectively). (A) Increase (B) Decrease (C) Remain constant (D) Either (A) or (B); depends on other factors

Last Answer : (A) Increase

With increase in the ratio of orifice diameter to pipe diameter, the fraction of the orifice pressure differential that is permanently lost (A) Increases(B) Decreases(C) Remains unchanged(D) Increases exponentially

Description : With increase in the ratio of orifice diameter to pipe diameter, the fraction of the orifice pressure differential that is permanently lost (A) Increases (B) Decreases (C) Remains unchanged (D) Increases exponentially

Last Answer : (B) Decreases

With increase in the ratio of orifice diameter to pipe diameter in case of an orificemeter, the overall pressure loss (A) Decreases (B) Increases (C) Remain constant (D) Increases linearly

Description : With increase in the ratio of orifice diameter to pipe diameter in case of an orificemeter, the overall pressure loss (A) Decreases (B) Increases (C) Remain constant (D) Increases linearly

Last Answer : (C) Remain constant

The co-efficient of discharge of an orificemeter is a function of (A) Reynolds number at the orifice (B) Ratio of orifice dia to pipe dia (C) Both (A) and (B) (D) None of the above parameters, and has a constant value of 0.61

Description : The co-efficient of discharge of an orificemeter is a function of (A) Reynolds number at the orifice (B) Ratio of orifice dia to pipe dia (C) Both (A) and (B) (D) None of the above parameters, and has a constant value of 0.61

Last Answer : (C) Both (A) and (B)

A pipe of length more than double the diameter of orifice fitted externally or internally to the orifice is called a (A) Notch (B) Weir (C) Mouthpiece (D) Nozzle

Description : A pipe of length more than double the diameter of orifice fitted externally or internally to the orifice is called a (A) Notch (B) Weir (C) Mouthpiece (D) Nozzle

Last Answer : Answer: Option C

Flow of water in a pipe about 3 metres in diameter can be measured by (A) Orifice plate (B) Venturimeter (C) Rotameter (D) Pitot tube

Description : Flow of water in a pipe about 3 metres in diameter can be measured by (A) Orifice plate (B) Venturimeter (C) Rotameter (D) Pitot tube

Last Answer : Answer: Option D

What is a filter used for ?

Description : What is a filter used for ?

Last Answer : The half wave and full wave signals are pulsating D . C . voltages. The use of such voltages is limited to charging batteries, running D. C. motors, and a few other applications. What we really ... voltage from a battery. To get a constant voltage from this, we can use a capacitor input filter. 

What is Zener Diode ? What is a voltage Regulator ?

Description : What is Zener Diode ? What is a voltage Regulator ?

Last Answer : The breakdown region of a p n diode can be made very sharp and almost vertical Diodes with almost vertical breakdown region are known as Zever Diodes. A Zener diodes operating in the breakdown ... VOLTAGE REGULATOR : The output remains constant despite changes in input voltage due to Zever effect.  

What is transistor ? What are the different types ?

Description : What is transistor ? What are the different types ?

Last Answer : A transistor is a three lagged semi conductor device. Basically a transistor means (transfer - resister). Whether the transistor is pnp or npn it resembles two diodes (back to back). The one of the left ... transistor : Emitter - Base - Forward Bias. Collector - Base - Reverse Bias. 

What is CB, CE and CC configuration ?

Description : What is CB, CE and CC configuration ?

Last Answer : Buffer : A device or a circuit used to isolate two pt'ne circuits or stages. The emitter follows is a example of buffer. Alpha = IC / IE Beta = IC / IB

How will you test a transistor with a multimeter. ?

Description : How will you test a transistor with a multimeter. ?

Last Answer : 1. Emitter +ve of meter and Base -ve output = Low resistance 2. Emitter -ve of meter and base +ve output = High resistance. 3. Collector +ve and Base -ve output = Low. 4. Collector -ve and base +ve output = High. Emitter : Collector = High Resistance. PNP : Opposite Results. 

What is a thyristor ? What are its uses ?

Description : What is a thyristor ? What are its uses ?

Last Answer : A thyristor is a special kind of semi conductor device that uses internal feedback to produce latching action. Use : Used for controlling large amounts of load power in motors, heaters, lighting systems etc ... the latches like a open switch. This latch will always stay in open or close position.  

What does a transmitter output start from 3-15 psi or (0.2 - 1 Kg/Cm2) or 4 - 20 ma. etc. ?

Description : What does a transmitter output start from 3-15 psi or (0.2 - 1 Kg/Cm2) or 4 - 20 ma. etc. ? 

Last Answer : The transmitter output stance from what is known as "live zero". This system has specific advantages : 1. The systems automatically alarms when the signal system becomes inoperative. ... transmitter operating, but transmitting a zero measurement and a failure, in the signal system. 

What are Intrinsically safe system ?

Description : What are Intrinsically safe system ?

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Description : What is Furnace Draft control ? 

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What is the difference the a wheatstone bridge and a potentiometer ?

Description : What is the difference the a wheatstone bridge and a potentiometer ?

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Description : What is the specialty of thermocouples lead wires ?

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Description : What are skin temperature thermocouples ? 

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What type of sensing element would you use to measure very low temperature ?

Description : What type of sensing element would you use to measure very low temperature ?

Last Answer : The sensing element used for measuring very low temperature is R. T. D. ( Resistance Temperature Detector )

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Description : How will you calibrate a temp. recorder using a potentiometer ?

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Description : Why are Thermowells used ?

Last Answer : In numerous application it is neither desirable nor practical to expose a temperature sensor directly to a process material. Wells are therefore used to protect against damage corrosion, erosion, abrasion and high pressure processes. A ... 3. Monel. 4. Alloy steal. 5. Hastelloy 'C'.

Why is a converter used in a temp. recorder ?

Description : Why is a converter used in a temp. recorder ? 

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What is burnout feature ? Explain.

Description : What is burnout feature ? Explain.

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What is the constant voltage unit ?

Description : What is the constant voltage unit ?

Last Answer : The constant voltage circuit consists of a rectifier, CR, a filter capacitor C1, followed by two stages of zener regulation. Abridge configuration is provided to 1amp line voltage regulation ... , Thus variations. Resisters R2 and R3 form a bridge that any remoment line voltage effects. 

Draw a potentiometer temp. Measuring circuits and explain its?

Description : Draw a potentiometer temp. Measuring circuits and explain its?  

Last Answer : OPERATION : The input to the instrument is a measurement of some in the processes using a sensing element ( such as thermocouple ) or a device to produce direct voltage, which is the voltage (signal) ... to zero results ( null point ) the balancing ( servo motor is be longer driven )   

What is two wire and three wire R.T.D. system ?

Description : What is two wire and three wire R.T.D. system ?  

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What is Pt 100 mean. ?

Description : What is Pt 100 mean. ? 

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Explain the working of an Enraf level gauge?

Description : Explain the working of an Enraf level gauge?

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How will you commission D.P. transmitter in field in pressurized vessel.

Description : How will you commission D.P. transmitter in field in pressurized vessel.

Last Answer : ١. Close both the isolation valves, Vent the H.P. side. ٢. Fill it with the sealing liquid. ٣. Open the L.P. side vent valve. ٤. Adjust zero with suppression spring. ٥. Close the L.P. side vent valve. ٦. Open both the isolation valves.  

What are the limitations of leveltrol ?

Description : What are the limitations of leveltrol ?

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What is the used of Suppression and elevation ?

Description : What is the used of Suppression and elevation ?  

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How will you calibrate a leveltrol in the field ?

Description : How will you calibrate a leveltrol in the field ?

Last Answer : Calculation # 1 If the calibrating liquid is water: Process Liquid Density / 1* Displacer height = mm of H2O. Calculation # 2 If the calibrating liquid is Other liquid: Process Liquid Density / ... gravity or span adjustment ( Electronic Level ). 6. Fill it up to 50 %, check linearity.  

What is interface level ? How do you calculate it ?

Description : What is interface level ? How do you calculate it ?  

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How will you reverse an action of the leveltrol.?

Description : How will you reverse an action of the leveltrol.?  

Last Answer : The reversing are serves as motion take off arm from the torque tube. It is provided with a slot on each side of the center so that link can be connected either for reverse or direct action.

Explain the working an electronic leveltrol.

Description : Explain the working an electronic leveltrol. 

Last Answer : The variation in buoyancy resulting from a change in liquid level, varies the net weight of the displacer increasing or decreasing the load on the torque arm. This change is directly ... change proportional to the rotor displacement, which is converted and amplified to a D.C. current.

Explain the working of a leveltrol.

Description : Explain the working of a leveltrol.

Last Answer : The leveltrol is used for measuring level of liquids in a closed vessel. ١. PRINCIPLE. : It works on Archimedes principle "The loss in weight of a body immersed in a liquid is equal to ... proportional output air pressure. ٦. CONTROL SETTING UNIT : Provides a motions of varying the set point.