Stationary Engineer Practice Quiz

Are you aspiring to become a Stationary Engineer? Prepare for success with our Stationary Engineer Practice Quiz tailored for the Class 3 Examination. This comprehensive quiz covers essential questions to aid you in any licensing exam. It's both educational and engaging. Aim for a score above 70 to prove your expertise. Let's test your knowledge. Good luck!

Edited by Me.bot Editorial Team Questions: 50 September 25, 2024

Character Test

1. The lowest visible water level in the sight glass is ___ above the top of the boiler tubes in a scotch marine boiler.

12'

2. The three types of feedwater pumps are _______, _, and _______.

Reciprocating, centrifugal, and rotary

Reciprocating, centrifugal, and screw

Positive displacement, reciprocating, and centrifugal

Reciprocating, scroll, and centrifugal

3. The minimum size for the connection between the sight glass and the water column is _____.

1/4'

3/8'

1/2'

3/4'

4. _____________ is commonly used as a replacement for refrigerant R-22.

R-410a

R-123

R-134a

R-401a

5. A refrigerant system using R-134a is running at 148 psi on the discharge and 16 psi on the suction. What is the compression ratio?

9.2:1

5.3:1

8:1

10:1

6. When using a lift lever to manually test a safety valve, the boiler pressure must be at least _____ percent of the safety valve set point.

7. Unlike an infrared scanner, the ultraviolet scanner is not affected by the light given off by hot _________________.

Flames

Plasma

Refractories

Combustion gases

8. The _ and ___ _ ___ sense heat to prove flame in the boiler.

Stack switch and rectifying flame rod

Flue sensor and infrared sensor

Stack switch and infrared sensor

Flue sensor and rectifying flame rod

9. A air handler unit operates at the rated capacity at all times.

Variable Volume

Constant Volume

Single Zone

Multi-Zone

10. If a bulge in a boiler is less than ______ of its length, it should generally be left alone unless the metal is badly burned.

10%

11. A dry pipe on a Scotch Marine Boiler is used to remove _____________ from steam before it leaves the boiler.

Moisture

Air

Oxygen

CO2

12. The ________ _ mechanism on the high limit control calls attention if the ____________ control has malfunctioned.

Manual reset; operating

Automatic reset; burner

Manual reset; burner

Automatic reset; operating

13. An ___________________ Ring is one method used to support the Morrison Tube in a Scotch Marine Boiler.

Adamson

Smithers

Morrison

Faulkner

14. A 10 x 5 x 15 duplex reciprocating pump has a steam cylinder diameter of __ inches, water cylinder diameter of inches, and stroke length of _ inches.

10, 5, 15

5, 10, 15

20, 10, 30

15, 5, 10

15. Boiler stop valves over 2” diameter must be ________-_- and -_____.

Outside Stem and Yolk

Outside Screw and Yolk

Outside Stem and Wheel

Packing Gland and Wheel

16. A centrifugal pump uses a ________ to convert velocity energy to pressure energy.

Impeller

Volute

Guide vanes

Propeller

17. A 26” x 48” rectangular duct is replaced with a round duct. What is the minimum diameter of the round duct to provide the same area?

35.33'

17.66'

19.93'

39.87'

18. A __ _ AHU supplies conditioned air to only one area of the building.

Single Zone

Variable Volume

Constant Volume

Multi Zone

19. The pipes connecting the water column to the boiler must be a minimum diameter of ____ inch.

3/4'

2.5'

20. The two types of electric boilers are _ and .

Resistance & electrode

Arc Tube & electrode

Resistance & capacitance

Electrode & capacitance

21. There is no _______ _ ___________ above the critical pressure, because water and steam have the same density.

Latent heat of vaporization

Specific Heat of Atomization

Latent heat of atomization

Specific heat of vaporization

22. __________ are used extensively in pulverized-fuel-burning plants to keep heat-absorbing surfaces free from soot and ash buildup.

Soot Blowers

Stack Scrubbers

Chain Grate Stokers

Tube punchers

23. ______________ is used on high pressure steam plants to remove oxygen. It is not typically used on low pressure steam plants due to its slow reaction.

Hydrazine

Deaerator

Amines

Oxygen scavengers

24. According to ASME code, a HTHW boiler operates above or .

160 PSI, 250°F

150 PSI, 200°F

150 PSI, 100°C

14.7 PSI, 212°F

25. The waste products from sugar cane are used in a _______________ plant.

Bagasse

Black liquor

Red liquor

Saccarine refinery

26. ______________ usually cause cavities to form at grain boundaries in metal, leading to crack coalescence.

Creep

Corrosion

Grain fatigue

Crusting

27. Cogeneration plants sell ______ to industrial plants and _ to local ____.

Steam, electricity, utilities

Fuel oil, steam, power plants

Steam, condensate, cogeners

Propane, fuel oil, utilities

28. If a tubesheet is corroded more than ______ percent of its original thickness, the defective section must be removed and a flush patch installed.

20%

10%

35%

50%

29. A ___ _ AHU has heating and cooling coils located at different zones and uses air dampers to maintain comfort.

Multi Zone

Variable Volume

Constant Volume

Single Zone

30. Operation of a black liquor boiler is known for its ______ generation and heat recovery of _ _____.

Steam, soda ash

Power, waste heat

Steam, sulfuric acid

Lignin, soda ash

31. No. 4 fuel oil has _____________ BTUs per pound.

18,840

19,720

22,475

19,657

32. Leaking safety valves should be to stop the leakage, never .

Replaced, tightened

Recalibrated, patched

Reground, tightened

Replaced, patched

33. Hardness measures the and ___ ions in solution.

Calcium, magnesium

Calcium, sulfate

Calcium, bicarbonate

Carbonate, bicarbonate

34. Operating a boiler at temperatures 10°F to 20°F above the design temperature for long periods can reduce its life by _ to _ years.

10-20

5-10

20-40

15-30

35. A dual duct AHU has hot and cold ducts connected to a _____ _.

Mixing Box

Supply Duct

Return Duct

VAV BOX

36. A terminal reheat AHU delivers air at constant ______ degrees. A reheat coil maintains comfort.

37. An induction AHU uses high pressure air flowing through the ________ to draw air across the heating coil.

Induction nozzles

Induction coils

Venturi nozzles

Induction vanes

38. When two or more boilers are connected to a common steam header and each has a manhole, _____ stop valves must be used on each boiler.

39. Galvanic corrosion occurs when metals are in direct contact in a environment.

Dissimilar, conductive

Similar, humid

Dissimilar, humid

Similar, conductive

40. A stay shorter than 8” and threaded must have a blank.

Tell tale hole

Stay brace

Riveted connection

Bolt brace

41. A ___________ Pump is a Positive Displacement Pump.

Reciprocating

Centrifugal

Duplex

Rotary

42. In lieu of a stop valve, a ________ _ may be used closest to the boiler.

Non-return valve

Check valve

Non-return valve, farthest

Check valve, farthest

43. A slow opening blowdown valve must complete _____ turns between full open and full shut.

44. What restriction in circulation is due to a steam pocket inside the pump?

Steam bound

Pump cavitation

Vacuum bound

Vacuum cavitation

45. One grain is equal to ________ parts per million.

17.1

18.5

33.3

46. What are the 4 steps to regenerate a zeolite water softener?

Backwash, Brine Rinse, Slow/Fast Rinse, Back in Service

Brine rinse, backwash, membrane sweep, back in service

Pre-rinse, backwash, membrane sweep, regeneration

Backwash, brine rinse, slow/fast rinse, regeneration

47. A solid that precipitates out of solution and adheres to boiler heating surfaces is called__________.

Scale

Precipitant

Crust

Embrittlement

48. In a ___________ water softener, calcium and magnesium ions are exchanged for sodium ions, forming a removable salt sludge.

Zeolite

Sodium bicarbonate

Activated carbon

Ion exchange

49. The color of a cylinder containing R-11 is _________ prior to 2020.

Orange

White

Light Green

Coral Red

50. A ____________________ pump can be started with the discharge valve shut.

Reciprocating

Centrifugal

Rotary

Simplex

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Frequently Asked Questions

What is the Stationary Engineer Practice Quiz?

The Stationary Engineer Practice Quiz is a comprehensive set of questions designed to help you prepare for the Stationary Engineer Class 3 Examination, ensuring you cover key topics and concepts for licensing exams.

How can the Stationary Engineer Practice Quiz help me with my exam?

This practice quiz helps you by offering a wide range of questions that mirror those found on the real Stationary Engineer Class 3 Examination, thus providing a solid foundation for your preparation and boosting your chances of scoring above 70.

Is the Stationary Engineer Practice Quiz suitable for beginners?

Yes, the Stationary Engineer Practice Quiz is designed to be educational and engaging for all levels, including beginners, helping them to understand and master key concepts required for the Class 3 Examination.

What topics are covered in the Stationary Engineer Practice Quiz?

The Stationary Engineer Practice Quiz covers a broad range of topics essential for the Stationary Engineer Class 3 Examination, including safety procedures, mechanical systems, and troubleshooting techniques.

How can I access the Stationary Engineer Practice Quiz?

You can access the Stationary Engineer Practice Quiz online through our quiz platform, making it easy and convenient to practice anytime and anywhere, ensuring you are well-prepared for your licensing exam.

RELATED QUIZZES

2024-09-05

Stationary Engineer Practice Quiz

Character Test

1. The lowest visible water level in the sight glass is ___ above the top of the boiler tubes in a scotch marine boiler.

2. The three types of feedwater pumps are _______________, _______________, and _____________.

3. The minimum size for the connection between the sight glass and the water column is _____.

4. _____________ is commonly used as a replacement for refrigerant R-22.

5. A refrigerant system using R-134a is running at 148 psi on the discharge and 16 psi on the suction. What is the compression ratio?

6. When using a lift lever to manually test a safety valve, the boiler pressure must be at least _____ percent of the safety valve set point.

7. Unlike an infrared scanner, the ultraviolet scanner is not affected by the light given off by hot _________________.

8. The _________ __________ and _____________ _________ _______ sense heat to prove flame in the boiler.

9. A ____________ ____________ air handler unit operates at the rated capacity at all times.

10. If a bulge in a boiler is less than ______ of its length, it should generally be left alone unless the metal is badly burned.

11. A dry pipe on a Scotch Marine Boiler is used to remove _____________ from steam before it leaves the boiler.

12. The ____________ _________ mechanism on the high limit control calls attention if the ________________ control has malfunctioned.

13. An ___________________ Ring is one method used to support the Morrison Tube in a Scotch Marine Boiler.

14. A 10 x 5 x 15 duplex reciprocating pump has a steam cylinder diameter of ____ inches, water cylinder diameter of ____ inches, and stroke length of ___ inches.

15. Boiler stop valves over 2” diameter must be ______________-___________- and -_________.

16. A centrifugal pump uses a ________ to convert velocity energy to pressure energy.

17. A 26” x 48” rectangular duct is replaced with a round duct. What is the minimum diameter of the round duct to provide the same area?

18. A ________ _______ AHU supplies conditioned air to only one area of the building.

19. The pipes connecting the water column to the boiler must be a minimum diameter of ____ inch.

20. The two types of electric boilers are _______________ and ______________.

21. There is no _____________ _____________ ____ _________________ above the critical pressure, because water and steam have the same density.

22. ______ ________________ are used extensively in pulverized-fuel-burning plants to keep heat-absorbing surfaces free from soot and ash buildup.

23. ______________ is used on high pressure steam plants to remove oxygen. It is not typically used on low pressure steam plants due to its slow reaction.

24. According to ASME code, a HTHW boiler operates above ____________ or ____________.

25. The waste products from sugar cane are used in a _______________ plant.

26. ______________ usually cause cavities to form at grain boundaries in metal, leading to crack coalescence.

27. Cogeneration plants sell ____________ to industrial plants and _____________ to local __________.

28. If a tubesheet is corroded more than ______ percent of its original thickness, the defective section must be removed and a flush patch installed.

29. A _________ _______ AHU has heating and cooling coils located at different zones and uses air dampers to maintain comfort.

30. Operation of a black liquor boiler is known for its __________ generation and heat recovery of _______ _______.

31. No. 4 fuel oil has _____________ BTUs per pound.

32. Leaking safety valves should be ____________ to stop the leakage, never ____________.

33. Hardness measures the ____________ and _______________ ions in solution.

34. Operating a boiler at temperatures 10°F to 20°F above the design temperature for long periods can reduce its life by _____ to _____ years.

35. A dual duct AHU has hot and cold ducts connected to a ___________ _______.

36. A terminal reheat AHU delivers air at constant ______ degrees. A reheat coil maintains comfort.

37. An induction AHU uses high pressure air flowing through the ________ to draw air across the heating coil.

38. When two or more boilers are connected to a common steam header and each has a manhole, _____ stop valves must be used on each boiler.

39. Galvanic corrosion occurs when ______________ metals are in direct contact in a ______________ environment.

40. A stay shorter than 8” and threaded must have a blank.

41. A ___________ Pump is a Positive Displacement Pump.

42. In lieu of a stop valve, a ____________ _____ may be used closest to the boiler.

43. A slow opening blowdown valve must complete _____ turns between full open and full shut.

44. What restriction in circulation is due to a steam pocket inside the pump?

45. One grain is equal to ________ parts per million.

46. What are the 4 steps to regenerate a zeolite water softener?

47. A solid that precipitates out of solution and adheres to boiler heating surfaces is called__________.

48. In a ___________ water softener, calcium and magnesium ions are exchanged for sodium ions, forming a removable salt sludge.

49. The color of a cylinder containing R-11 is _________ prior to 2020.

50. A ____________________ pump can be started with the discharge valve shut.

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2. The three types of feedwater pumps are _______, _, and _______.

8. The _ and ___ _ ___ sense heat to prove flame in the boiler.

9. A air handler unit operates at the rated capacity at all times.

12. The ________ _ mechanism on the high limit control calls attention if the ____________ control has malfunctioned.

14. A 10 x 5 x 15 duplex reciprocating pump has a steam cylinder diameter of __ inches, water cylinder diameter of inches, and stroke length of _ inches.

15. Boiler stop valves over 2” diameter must be ________-_- and -_____.

18. A __ _ AHU supplies conditioned air to only one area of the building.

20. The two types of electric boilers are _ and .

21. There is no _______ _ ___________ above the critical pressure, because water and steam have the same density.

22. __________ are used extensively in pulverized-fuel-burning plants to keep heat-absorbing surfaces free from soot and ash buildup.

24. According to ASME code, a HTHW boiler operates above or .

27. Cogeneration plants sell ______ to industrial plants and _ to local ____.

29. A ___ _ AHU has heating and cooling coils located at different zones and uses air dampers to maintain comfort.

30. Operation of a black liquor boiler is known for its ______ generation and heat recovery of _ _____.

32. Leaking safety valves should be to stop the leakage, never .

33. Hardness measures the and ___ ions in solution.

34. Operating a boiler at temperatures 10°F to 20°F above the design temperature for long periods can reduce its life by _ to _ years.

35. A dual duct AHU has hot and cold ducts connected to a _____ _.

39. Galvanic corrosion occurs when metals are in direct contact in a environment.

42. In lieu of a stop valve, a ________ _ may be used closest to the boiler.