Question

The only time it is permissible to set the popping point of a safety valve higher than the S.W.P. is when:

a) the boiler is under 5 years old
b) approved by the state boiler inspector
c) there is more than one valve, one may be 3% above S.W.P
d) if there is more than one valve, one may be 6% above S.W.P.

Answer 1

The only time it is permissible to set the popping point of a safety valve higher than the S.W.P. is when there is more than one valve, one may be 3% above S.W.P.

Step-by-step explanation:

The subject of this question is Engineering and it is at the college level.

The correct answer is (c) there is more than one valve, one may be 3% above S.W.P. This means that if there is more than one safety valve installed, one of them may be set to a maximum pressure that is 3% higher than the S.W.P. or the Set Working Pressure.

For example, if the S.W.P. of a boiler is 100 psi, one valve may be set to a maximum pressure of 103 psi while still being within the permissible limits.