Stationary engineering lic prep Exam Questions And Answers

Stationary engineering lic prep Exam Questions And Answers Wire drawing - answerDifference in pressure going from a large volume to a smaller volume Continuous blowdown - answerUsed for the removal of surface impurities on the boilers water surface Why are stays used on flat surfaces not round? - answerPressure acting on flat surfaces have a tendency to cause them to become round What is an air pre heater? - answerUsed to pre heat combustion air prior to entering the combustion chamber of a boiler, uses waste exhaust gases Two common type of air pre heater - answerTubular, regenerative What type of stays are used in a stirling boiler? And why? - answerA stirling boiler has no flat surfaces and will not require any stays What is latent heat? - answerThe energy required measured in b.t.u's to cause a change of state How do you find the true water level in a boiler? - answerGive the column and glass a thorough blow, then check your tri-Cocks to see that both gauge glass as well as tri-cocks coincide with each other How often should a safety valve be tested? - answerA safety valve in the state of Massachusetts should be tested daily for proper operation How would you give the column and glass a thorough blow? - answer1. Open the drain to the column 2. Close the steam connection to the glass 3. With the drain valve still open, close the water connection and open the steam connection 4. Open the water connection and close the drain to the glass Wire drawing - answerDifference in pressure going from a large volume to a smaller volume Continuous blowdown - answerUsed for the removal of surface impurities on the boilers water surface