3rd Grade Engineer Practice Test Questions with Answers

1. How can you lose your license? Drinking on the job, sleeping on the job, negligence, unsafe work, signing a falsified license application for someone or failing to renew your license annually. 2. What must you do if you change jobs? You must notify city hall if you change jobs, change address, or retire. 3. Why should you do rounds? So you can find and correct problems to prevent breakdowns. Keeping permanent records will make it easy to forecast most breakdowns because you will get to know your equipment. 4. What is a steam boiler? A steam boiler is a closed vessel PARTLY FILLED WITH WATER, under pressure, that transforms water to steam with the application of heat. 5. What are the requirements of a good boiler? 1) Simple. 2) Designed to accommodate expansion and contraction. 3) Adequate steam and water space. 4) Efficent. 5) Responsive to demands. 6) Accessible for cleaning and repair. 7) Safe. 6. Name and describe three types of heat transfer in a boiler operation. RADIANT HEAT is transmitted from a hot body to a cold body by means of direct radiation. The heat from the sun reaches us by means of radiation. CONDUCTION HEAT is passed by physical contact. A coffee cup is heated by conduction when the hot coffee touches the cup. CONVECTION HEAT is carried along by a moving body such as air or water. Your living room is heated by warm air from a furnace in another location in your room. 7. What is a combustion chamber? The area of the boiler where COMPLETE burning of the fuel occurs. 8. What is internally fired boiler and name four types. Internally fired boilers have the grates and combustion chamber enclosed within the boiler shell. Scotch Marine, vertical fire tube, locomotive, and cast iron package boilers. 9. What is an externally fired boiler and name four types. Externally fired boilers have the setting including the furnace and grates separate and distinct from the shell.