Engine : General Subjects - 1077/1128
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| For a pneumatic transmission system for instrumentation purposes, if a pneumatic instantaneous flow indicator has a calibrated scale of 0 to 1000 gpm, what would be the actual measured instantaneous flow rate if the transmitted pneumatic signal pressure to the indicator is 9 psig, assuming the industry standard of 3 to 15 psig is used for instrument air? |
| A) 375 gpm |
| B) 500 gpm |
| C) 625 gpm |
| D) 750 gpm |
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| jbenavente - 2018-08-30 04:49:49 Expired Member (14) |
| I wish all the questions had the formula's. |
| bybymsn - 2016-09-16 17:49:32 Member (8) |
| The regulator range is 3-15 psi, a difference of 12 psi. So, since 3 psi is the minimum an input of 9 psi would actually be 50% (9 psi minus 3= 6 psi). And 50% of 1000 is 500 rpm. What they're talking about is a pneumatically controlled flow valve. One of these: http://www.lesliecontrols.com/iomindex/20_1_5_2Rev3.pdf |
| magnussonshred - 2016-09-14 15:36:16 Member (3) |
| What's the equation for this one? |