up Stationary Grade 3 Engineering License Exam Questions And Answers

up Stationary Grade 3 Engineering License Exam Questions And Answers How can you lose your license? - ANS 1) drinking on the job 2) sleeping on the job 3) negligence 4) unsafe work 5) signing a falsified license application for someone 6) failing to renew your license annually what must you do if you change jobs? - ANS notify city hall if you change jobs, address or retire why should you do rounds? - ANS Find and correct problems to prevent breakdowns. keeping permanent records will make it easy to forecast most breakdowns because you will get to know equipment what is a steam boiler? - ANS closed vessel, PARTIALLY FILLED WITH WATER, under pressure that transforms water to steam with the application of heat. what are the requirements of a good boiler? - ANS 1) simple 2) designed to accommodate expansion and contraction 3) adequate steam and water space 4) efficient 5) responsive to demands 6) accessible for cleaning and repairs 7) safe Name and describe 3 types of heat transfer used in boiler operation - ANS 1) RADIANT HEAT - transmitted from hot body to a cold body by means of direct radiation (heat from sun reaches us by radiation) 2) CONDUCTION - physical contact (coffee cup is heated by conduction when hot coffee touches the cup) 3) CONVECTION - carried along by a moving part such as air or water (your living room is heated by warm air from your furnace in another location what is a combustion chamber? - ANS the area of the boiler where COMPLETE burning of the fuel occurs what is an internally fired boiler? ----- name 4 types - ANS those in which the grate and combustion chamber are enclosed within the boiler shell. ----- 1) Scotch marine 2) Vertical firetube 3) Locomotive 4) Cast iron package boiler what is an externally fired boiler ----- name 4 types - ANS the setting, including the furnace and grates is separate and distinct from the boiler shell. ----- 1) horizontal return tubular (HRT) set in brick 2) some watertube 3) cast iron set in brick 4) Stirling boiler 5) Heine boiler what is a crown sheet and its purpose? ----- what is a tube sheet and its purpose? - ANS in a vertical firetube boiler holds the tubes and is thicker because it is exposed to the fire. ----- holds the tubes and does not see the fire what is a waterleg on a boiler? - ANS space between the outer shell and the furnace containing boiler water. it absorbs heat that would be wasted and increases the capacity of the boiler. the surfaces are flat and must be stayed. is an HRT Boiler set level or inclined and why? ----- are HRT Boiler tubes set level or inclined and why? - ANS INCLINED 1-3" front to rear to permit drainage and removal of water impurities ----- INCLINED with the boiler