4th Class Maine Stationary Steam Engineer
Stationary Engineer Practice Exam 2026
1. Operating pumps in a plant properly is a The discharge pressure would be 35 psi
part of the operator's job. In the sketch be-
low what would the pressure of the pump
discharge pressure be at "C" for the sp. gr.
shown and the feet conditions indicated?
2. By N.J.A.C. 12:90, a person holding a 1-C A high-pressure plant of 1,000 BHP, A
license, my act as a chief engineer of what low-pressure plant of 500 BHP, and A
type and capacity plant? low-pressure plant of 1250 BHP (All of the
Above)
3. In order to perform an alteration of your National Board R Stamp
boiler or pressure vessel, what stamp must
the Chief Engineer ensure the repair com-
pany maintains?
4. Which of the following isn't a true state- A low pressure plant requires a Chief Engi-
ment? neer when the capacity is over 500 HP.
5. As Chief Engineer, when your company The Data Report
purchases a boiler, what is the most impor-
tant document for you to request?
6. What ASME code section would a Chief En- Section VII
gineer use to determine the best method
of care for a boiler built to Section 1?
7. If power is supplied to a circuit at 440 V, Power factor of 0.8
and the current drawn is 100 A. The current
doing the actual work is 80 A. What is the
power factor?hast
8.
1/9
, 4th Class Maine Stationary Steam Engineer
Stationary Engineer Practice Exam 2026
Which of the following locations would re- A high rise building occupied by more that
quire a licensed operator to be present 6 people not security, not custodial, with an
while the boiler is in operator? (not neces- 1cH 1d stamped boiler with a MRVC at 30 psi
sarily a blue steam operator). with a 4,600 MBH burner input.
9. Which one of the following describes Actuates when a breaker over-current trip
the normal operation of a local breaker has occurred; can be manually reset when
over-current trip indicator flag? the over-current condition clears.
10. What situation can occur if the pip- It is possible that with an improper piping
ing to the inlet valve on an exter- tie-in you could have the water inlet valve
nally installed water-feeding device isn't feed water into the boiler through the float
hooked-up (tied-in) correctly? Provide the chamber or its connections to the boiler.
best possible answer.
11. An operator attempts to close a fully-open The valve disk has jammed against its
upright manual gate valve to isolate a baskseat by the ditterence in the thermal
pump in a cooling water system that has contraction of the stem and the bonnet.
been cooled down or maintenance. How-
ever, the operator is unable to rotate the
hand wheel in the close direction. Which of
the following could cause the condition?
12. How is the rotation reversed on a By reversing any two powers leads
three-phase motor?
13. What is the rpm of a single-acting com- 300 rpm
pressor, if the stroke is 8 inches and the
piston speed is 400 feet per minute?
14. In centrifugal pump calculations, what for- Hp = 2.31p / sg
mula would be used to calculate the head
corresponding to a given pressure?
2/9
Stationary Engineer Practice Exam 2026
1. Operating pumps in a plant properly is a The discharge pressure would be 35 psi
part of the operator's job. In the sketch be-
low what would the pressure of the pump
discharge pressure be at "C" for the sp. gr.
shown and the feet conditions indicated?
2. By N.J.A.C. 12:90, a person holding a 1-C A high-pressure plant of 1,000 BHP, A
license, my act as a chief engineer of what low-pressure plant of 500 BHP, and A
type and capacity plant? low-pressure plant of 1250 BHP (All of the
Above)
3. In order to perform an alteration of your National Board R Stamp
boiler or pressure vessel, what stamp must
the Chief Engineer ensure the repair com-
pany maintains?
4. Which of the following isn't a true state- A low pressure plant requires a Chief Engi-
ment? neer when the capacity is over 500 HP.
5. As Chief Engineer, when your company The Data Report
purchases a boiler, what is the most impor-
tant document for you to request?
6. What ASME code section would a Chief En- Section VII
gineer use to determine the best method
of care for a boiler built to Section 1?
7. If power is supplied to a circuit at 440 V, Power factor of 0.8
and the current drawn is 100 A. The current
doing the actual work is 80 A. What is the
power factor?hast
8.
1/9
, 4th Class Maine Stationary Steam Engineer
Stationary Engineer Practice Exam 2026
Which of the following locations would re- A high rise building occupied by more that
quire a licensed operator to be present 6 people not security, not custodial, with an
while the boiler is in operator? (not neces- 1cH 1d stamped boiler with a MRVC at 30 psi
sarily a blue steam operator). with a 4,600 MBH burner input.
9. Which one of the following describes Actuates when a breaker over-current trip
the normal operation of a local breaker has occurred; can be manually reset when
over-current trip indicator flag? the over-current condition clears.
10. What situation can occur if the pip- It is possible that with an improper piping
ing to the inlet valve on an exter- tie-in you could have the water inlet valve
nally installed water-feeding device isn't feed water into the boiler through the float
hooked-up (tied-in) correctly? Provide the chamber or its connections to the boiler.
best possible answer.
11. An operator attempts to close a fully-open The valve disk has jammed against its
upright manual gate valve to isolate a baskseat by the ditterence in the thermal
pump in a cooling water system that has contraction of the stem and the bonnet.
been cooled down or maintenance. How-
ever, the operator is unable to rotate the
hand wheel in the close direction. Which of
the following could cause the condition?
12. How is the rotation reversed on a By reversing any two powers leads
three-phase motor?
13. What is the rpm of a single-acting com- 300 rpm
pressor, if the stroke is 8 inches and the
piston speed is 400 feet per minute?
14. In centrifugal pump calculations, what for- Hp = 2.31p / sg
mula would be used to calculate the head
corresponding to a given pressure?
2/9
