Detroit Stationary Engineer 3rd Class
Practice Exam 1 Questions with Verified
Correct Answer Latest Update 2025
For water service, the piping most subject to corrosion:
a. Steel
b. Copper
c. Iron --- correct answers ---a. Steel
While in successful operation:
a. Pressure above 14.7 psig
b. Atmospheric pressure
c. A pressure below 14.7 psig --- correct answers ---c. A pressure
below 14.7 psig
The height of the water in an air chamber of a pump should be at
least:
a. 1/4 the height of the air chamber
b. 1/2 the height of the air chamber
,c. 3/4 the height of the air chamber --- correct answers ---c. 3/4 the
height of the air chamber
The least amount of scale and corrosion producing substance in the
feed water and steam cycle is in:
a. Feed water
b. Saturated steam
c. Superheated steam --- correct answers ---c. Superheated steam
It is considered good practice to open the vent cock on a boiler when:
a. Lighting off the boiler
b. The air is contaminated.
c. About to open the boiler for cleaning purposes and lighting off a
cold boiler. --- correct answers ---c. About to open the boiler for
cleaning purposes and lighting off a cold boiler.
It is considered a good practice to test safety valves on large
installations:
a. Whenever the boiler is put in service.
b. At least once a shift by raising the steam pressure.
, c. By the hand lever when the boiler is down. --- correct answers ---a.
Whenever the boiler is put in service
If a simple D-slide valve has neither lap nor lead, steam will be cut off
to the cylinder:
a. At or near the end of the stroke.
b. At or near the beginning of the stoke.
c. At half stroke position of the stroke. --- correct answers ---a. At or
near the end of the stroke.
Large HRT boilers usually have:
a. Head to head stays supporting the upper parts of the tube sheets.
b. Diagonal stays supporting the upper part of the tube sheet.
c. An adamson ring supporting the upper part of the tube sheet. ---
correct answers ---b. Diagonal stays supporting the upper part of the
tube sheet.
Industrial fuel oil no. 6 has a heating value of:
a. 115,000-130,000 BTU/gal
b. 130,000-145,000 BTU/gal
Practice Exam 1 Questions with Verified
Correct Answer Latest Update 2025
For water service, the piping most subject to corrosion:
a. Steel
b. Copper
c. Iron --- correct answers ---a. Steel
While in successful operation:
a. Pressure above 14.7 psig
b. Atmospheric pressure
c. A pressure below 14.7 psig --- correct answers ---c. A pressure
below 14.7 psig
The height of the water in an air chamber of a pump should be at
least:
a. 1/4 the height of the air chamber
b. 1/2 the height of the air chamber
,c. 3/4 the height of the air chamber --- correct answers ---c. 3/4 the
height of the air chamber
The least amount of scale and corrosion producing substance in the
feed water and steam cycle is in:
a. Feed water
b. Saturated steam
c. Superheated steam --- correct answers ---c. Superheated steam
It is considered good practice to open the vent cock on a boiler when:
a. Lighting off the boiler
b. The air is contaminated.
c. About to open the boiler for cleaning purposes and lighting off a
cold boiler. --- correct answers ---c. About to open the boiler for
cleaning purposes and lighting off a cold boiler.
It is considered a good practice to test safety valves on large
installations:
a. Whenever the boiler is put in service.
b. At least once a shift by raising the steam pressure.
, c. By the hand lever when the boiler is down. --- correct answers ---a.
Whenever the boiler is put in service
If a simple D-slide valve has neither lap nor lead, steam will be cut off
to the cylinder:
a. At or near the end of the stroke.
b. At or near the beginning of the stoke.
c. At half stroke position of the stroke. --- correct answers ---a. At or
near the end of the stroke.
Large HRT boilers usually have:
a. Head to head stays supporting the upper parts of the tube sheets.
b. Diagonal stays supporting the upper part of the tube sheet.
c. An adamson ring supporting the upper part of the tube sheet. ---
correct answers ---b. Diagonal stays supporting the upper part of the
tube sheet.
Industrial fuel oil no. 6 has a heating value of:
a. 115,000-130,000 BTU/gal
b. 130,000-145,000 BTU/gal
