NJ Blue Seal Exam Questions and Answers Updated 2026/2027 Version | Verified Answers

NJ Blue Seal Exam Questions and Answers Updated 2026/2027 Version | Verified Answers 1. A common device found in the steam inlet of a condenser is: - ANSWER An atmospheric relief valve 2. How much pressure in psi in 1 inch of mercury? - ANSWER .491 3. How much pressure in psi in 24 inches of mercury? - ANSWER 24 x .491=11.78 psi 4. Formula for calculating speed of turbine: - ANSWER Rpm=F x 120/ P 5. What is the ideal or theoretical cycle of a gas turbine? - ANSWER Brayton cycle 6. Potential energy of steam is transferred into work form of energy in a turbine - ANSWER Mechanical 7. A vacuum gauge reads 27.5 in, and the barometer reading is 30.5 in Hg. What is the absolute pressure in pounds per square inch? - ANSWER 27.5-30.5= x.491=1.473. 1.5PSI 8. What is the psi of 24 inches Hg.? - ANSWER 24x.491= 11.78 psi 9. If your water flow transmitter indicated 60,000 # / hr what is the flow rate in gallons per minute? - ANSWER 60,000/60 min=1,000 1,000/8.33 gal= 120GPM 10. To prevent air from leaking into a feedwater pump and causing loss of prime what device is used - ANSWER Lantern Ring 11. What is the first thing you should do before blowing tubes on a boiler with a soot blower - ANSWER Drain the soot blower of condensate 12. A boiler produces 400 psi steam at 500°F. Normal saturated steam conditions are 444.6°F. What is the degree of superheat? - ANSWER 500-444.6= 55.4 degrees 13. The overspeed trip on a turbine should be tested - ANSWER Every time you start it up 14. A steam turbine operating at 3600 RPM trips at - ANSWER 3600x .10= 3960 RPM 15. In the operator must ensure that proper piping is being used standard pipe fittings (schedule 40) are satisfactory for what pressure and temperature? - ANSWER 125 Psi, over 450F 16. What is the thickness of a blowdown tank - ANSWER 5/16 17. What is the minimum size of a manhole - ANSWER 11x15 18. What is the absolute temperature of 8°C - ANSWER 8+273= 280 degrees K 19. What causes spalling in a furnace - ANSWER High temperature changes 20. The ideal or theoretical cycle of the simple power plant is called: - ANSWER The Rankine Cycle 21. What is the purpose of a governor on a turbine? - ANSWER Controls maximum speed 22. How ofter are governors tested - ANSWER Every time you start it up 23. What are the three main components of a gas turbine - ANSWER Compressor, combustor, turbine 24. Logbooks must confirm to what ASME code - ANSWER Section VII 25. A throttling calorimeter is used to measure the quality of - ANSWER Saturated steam 26. What is the total force being exerted on an 8 " x 24 " area of boiler plate that has 30 psi acting upon it? - ANSWER TF= Area x Psi 27. 8x24x30= 5,760 lbs. 28. The Blue Seal 1-C license allows you to be the Chief Engineer up to ____ Horsepower? - ANSWER 1,000 HP 29. If you have a 500 k/W generator, what is the HP? - ANSWER 1.341 x 500 = 670.5 30. What is the formula for finding the Factor of Evaporation ? - ANSWER FE Hs -(Tfw - 32)/970.3 31. What chemicals cause hard scale in a boiler? - ANSWER Calcium carbonate and magnesium carbonate 32. What is the critical speed of a turbine? - ANSWER The speed at which it vibrates the most 33. An intercooler is found: - ANSWER In a two stage air compressor 34. What protects a turbine shaft from bowing? - ANSWER A turning gear 35. When do you lubricate a turbine with oil? - ANSWER Before starting it up 36. What is the formula used to calculate Btu's in a pound of fuel? - ANSWER Btu's/lb. fuel= 17,687(57.7 x API) Plus (+) then Times (x)