13. Sciens.

Question 0

5. Maximum allowable working pressure (MAWP) ?

Answer 0

MAWP of a boiler is the maximum pressure in pounds per square inch (PSI) at which a boiler can safely be operated.

Question 1

3. Primary air.

Answer 1

It is the air that controls combustion efficiency by controlling how completely the fuel is burned.

Question 2

6. Total Force.

Answer 2

Total force is the amount of steam pressure acting against the safety valve disc. Total force is commonly expressed in pounds.