When a diaphragm device is used for boiler water level measurement, the boiler pressure is compensated for or off-set by
a) using a bellows on the HP side
b) a spring which balances the differential pressure
c) applying the pressure to both sides of the diaphragm
d) reversing the reference and variable legs
e) joining the reference and variable legs upstream of the device
Answer: C
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Power Engineering Chapter 85
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