we have LPG spherical Tank and we want to install DP Xmtr
for level measurement.below are the physical measurements
Total height of tank is 1850 mtr but 0% level is 1000mm
above bottom and 100% level is 450 below upper side.What is
the LRV and URV and please mention the formula .The SG of
LPG is 0.53 and Wet Leg method will be used.

Answers were Sorted based on User's Feedback



we have LPG spherical Tank and we want to install DP Xmtr for level measurement.below are the phys..

Answer / bill arbour

If the height of this spherical tank is 1850 meters, then
it has got to be the biggest spherical tank in the world.
It would be almost 2 Kms high. Check your numbers.

Is This Answer Correct ?    8 Yes 1 No

we have LPG spherical Tank and we want to install DP Xmtr for level measurement.below are the phys..

Answer / jabi

suppose the total height of tank is 18.5 mtr
LRV= 1mtr above from ground
URV= 14 mtr above from the ground(4.5mt below the top heigt)
Low pressure side total height= 13mtr

Differential pressure at LRV:
P(high)= height x SG
= 1 mtr x 0.53
= 530 mmWC
P (low)= 13 mtr x 0.53
= 6890 mmWC

LRV is equal to P(high)-P(low)
= 530-6890
= -6360 mmWC

Differential Pressure at URV:
P(high)= 14mtr x 0.53
= 7420 mmWC
P(low)= 13 mtr x 0.53
= 6890 mmWC

URV is equal to P(high)-P(low)
= 7420-6890
= 530 mmWC

Is This Answer Correct ?    4 Yes 0 No

we have LPG spherical Tank and we want to install DP Xmtr for level measurement.below are the phys..

Answer / ghalib

first the question is not clear,the total height of the
tank given in mtr(1850)but the 0% is above 1000mm,ok,but
100% level is 450 below upper side,(this 450 is in what-mm
or meter,pls make it clear

Is This Answer Correct ?    3 Yes 1 No

we have LPG spherical Tank and we want to install DP Xmtr for level measurement.below are the phys..

Answer / imran

Mr Ghalib Its 450mm below upper side.

Is This Answer Correct ?    2 Yes 1 No

we have LPG spherical Tank and we want to install DP Xmtr for level measurement.below are the phys..

Answer / chinna babu

LRV=(1m * 0.53) -(18.5 m *0.53)

URV= (14 m * 0.53)- (18.5 m *0.53)

Is This Answer Correct ?    1 Yes 0 No

we have LPG spherical Tank and we want to install DP Xmtr for level measurement.below are the phys..

Answer / imran

It is 18.50mtr

Is This Answer Correct ?    0 Yes 0 No

we have LPG spherical Tank and we want to install DP Xmtr for level measurement.below are the phys..

Answer / nestor

let us consider at 100% 450meters upper side so the wet leg measures:
1850 - (450 meter + 1 meter) = 1399 meter
so height(specific gravity) = 1399 (0.53) = 741.47 meter
span = URV-LRV
LRV = 1 meter(0.53) = 0.53 meter
so URV = span+LRV = 741.47 + 0.53 = 742 meter

Is This Answer Correct ?    0 Yes 3 No

Post New Answer

More Instrumentation Interview Questions

hi i want sov loop cheak from consol to field the operater given status to sov still no change, but MR room to sov ok so whats a problem and alreasy cheak all conection ok ?

2 Answers  


Name and describe at least 4 status indicators, typically found on a PLC

2 Answers  


1. what is 3 point calibration & 5 point calibration? 2. If we use hart communicator to set the LRV & URV of a smart transmitter, did we calibrate the transmitter? why? 3. Make a complet list if meterials needed to properly connect a pressure gauge to a steam pipe using 1/2 inch stainless steel tubing. The gauge connections is 1/2 inch NPT-M and the steam pipe tap has a 1/2 inch female coupling, compression fittings are use. 4. What are the tools in loop checking? 5. What would the ISA symbol of a square root extractor look like? 6. What would you do to completely prepare for the configuration? 7. What safety measures must you undertake when doing configuration? 8. what are the two most commonly use programming languages used when we configure a PLC? 9. What would you do if you accidentally skipped a step in the configuration procedure? 10. How would you know if the configuration were sucessful? 11. Name at least 3 selections available when we configure the burnout protection of a controller?

3 Answers   EI Electrotechnical Institute,


Sir, my yokugava FF TYPE LEVEL transmitter us bad, i don't have spares available, i want to replace it with a Rosemount FF transmitter, please tell me what procedure to be followed and what changes to be done in dcs part.

1 Answers   BPCL Bharat Petroleum, OEG,


please suggest me, how can i change the display setting in term of unit in place of % of Honeywell pressure transmitter ST3000S100?

2 Answers  






How do bending tubing provide better measurement than using tubing fittings such as elbows?

0 Answers  


What is the PLC Level & type.

2 Answers   Bhushan Power Steel,


What is Cavitation in a control valve?

0 Answers   CCIE, KN,


what is the exact job for automation enggineer?

0 Answers  


ON RADAR INTERFACE LEVEL TRANSMITTER IF DI-ELECRIC IS WRONG WITH CONTINIUS PROCESS THAN HOW CAN INDENTIFY OR HOW CAN I PUT NEW DI-ELECTRIC VALUE?(ROSEMOUNT-TDR-3300-COXIAL PROBE TYPE)

1 Answers   Chevron Phillips,


what is diff between the motor and pump

10 Answers   HCL,


flow transmitter range is 0 -500 mmwcc but the transmitter shows 12 ma for o mmwc instead of 4 ma ...how to solve this problem when we apply 375 mmwc it shows 16 ma

3 Answers  


Categories
  • Civil Engineering Interview Questions Civil Engineering (5085)
  • Mechanical Engineering Interview Questions Mechanical Engineering (4451)
  • Electrical Engineering Interview Questions Electrical Engineering (16632)
  • Electronics Communications Interview Questions Electronics Communications (3918)
  • Chemical Engineering Interview Questions Chemical Engineering (1095)
  • Aeronautical Engineering Interview Questions Aeronautical Engineering (239)
  • Bio Engineering Interview Questions Bio Engineering (96)
  • Metallurgy Interview Questions Metallurgy (361)
  • Industrial Engineering Interview Questions Industrial Engineering (259)
  • Instrumentation Interview Questions Instrumentation (3014)
  • Automobile Engineering Interview Questions Automobile Engineering (332)
  • Mechatronics Engineering Interview Questions Mechatronics Engineering (97)
  • Marine Engineering Interview Questions Marine Engineering (124)
  • Power Plant Engineering Interview Questions Power Plant Engineering (172)
  • Textile Engineering Interview Questions Textile Engineering (575)
  • Production Engineering Interview Questions Production Engineering (25)
  • Satellite Systems Engineering Interview Questions Satellite Systems Engineering (106)
  • Engineering AllOther Interview Questions Engineering AllOther (1379)