N.A.P.E. STATIONARY ENGINEERS (city of Amaha 3 rd grade) TEST QUESTIONS AND CORRECT ANSWERS LATEST GUIDE 2026 GRADED A+ .

1. How can you lose your license? correct answer Drinking on the job / sleeping on the job / negligence / unsafe work / failing to renew your license annually / signing a falsified licensing application for someone 2. What must you do if you change jobs? correct answer You must notify city hall if you change jobs, change your address or if you retire 3. Why should you do rounds? correct answer You do rounds so that you can find and correct problems to prevent break downs. Keeping permanent records will make it easier to forecast most breakdowns because you will get to know your equipment. 4. What is a steam Boiler? correct answer A steam boiler is a closed vessel PARTIALLY FILLED with water, under pressure, that transforms water into steam with the application of heat. 5. What are requirements of a good boiler? correct answer e 2. designed to accommodate expansion and contraction 3. adequate steam and water space 4. eflcient 5. responsive to demands 6. accessible for cleaning and repair 7. safe 6. Name and describe three types of heat transfer used in boiler operation. correct answer RA- DIANT HEAT-is heat radiated from a hot to cold body and depends on the temperature ditterence and the color of the body that receives the heat. The heat from the sun reaches us by means of radiation. CONDUCTION HEAT-is heat that passes from the gas to the tube by physical contact. The heat passes from molecule of metal to molecule of metal with no displacement of the molecules. CONVECTION HEAT-is heat transmitted from a hot to cold body by movement of the conveying substance. 7. What is a combustion chamber? correct answer The area of a boiler where the burning of fuel occurs 8. What is an internally fired boiler and name 4 types. correct answer Internally fired boilers are those in which the grate and combustion chamber are enclosed within the boiler shell. Scotch Marine Cast iron package Steam locomotive Vertical fire tube 3 / 11 9. What is an externally fired boiler and name 4 types. correct answer Externally fired boileris a boiler in which the setting, including furnace and grates are separate and distinct from the boiler shell. Horizontal return tube set on brick Heine Cast iron set on brick Sterling water tube 10. What is a crown sheet and what is its purpose? What is a tube sheet and what is its purpose? correct answer The crown sheet in a vertical fire tube boiler holds the tubes and is thicker because it is exposed to fire. The tube sheet holds the tubes and does not see the fire. 11. What is a water leg on a boiler? correct answer A water leg is the space between the outer shell and the furnace shell 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. 12. Is an H.R.T. boiler set level or inclined and why? correct answer H.R.T. boilers are inclined 1-3 inches front to rear, for drainage and removal of impurities. Boiler tubes are just inclined with the boiler shell. 13. Name 2 ways to support and take care of expansion of an H.R.T. boiler. Which way is the best? correct answer H.R.T. boiler can be set on saddles on the furnace wall, equipped with rollers to permit movementoftheboilerasitexpandsand contracts.Itmayalsobe suspendedfromhangersandsupportedby overhead beams. Hanging from beams works no hardship on furnace walls. 14. What is a longitudinal joint? What is a circumferential joint? correct answer Alongitudinaljointis a seam running the length of the shell and is butt strap construction or fusion welded. It is above the fire line to avoid overheating. A circumferential joint is a lap joint running the circumference of the joint. 15. What is the di