BLACK SEAL TEST 2026 QUESTIONS AND
ANSWERS SURE A+
✔✔If one atmosphere is about 14.7 psia what is the standard barometer reading at sea
level equal to? - ✔✔760 mm. Hg
✔✔If steam were reduced by a PRV from 500 psi to 125 psi, the steam at 125 psi would
have: - ✔✔the same heat as at 500 psi
✔✔In steam piping, which type of steam trap has no moving parts? - ✔✔the continuous
flow type
✔✔On a steam boiler in order to prevent the generation of steam greater than the
maximum working pressure requires activation of what device? - ✔✔The high steam
pressure limit control
✔✔The ASME code requires more than one safety valve on a boiler, when the boiler
has: - ✔✔over 500 square feet of heating surface
✔✔In what units of measurement are vaporstat type pressure switches calibrated in? -
✔✔inches of water
✔✔The steam pressure on a safety valve act upon upper side of the valve disc, which is
held down upon the seat by a spring that pushes down. - ✔✔false
✔✔Steam at 100 psi and 400 degrees F would be considered: - ✔✔superheated steam
✔✔How often should the safety valves on a power boiler be test blown? - ✔✔at least
once a month
, ✔✔A boiler with an MAWP of 150 psi and a safety valve setting of 100 psi with a 3"
valve disc - what would be the total force needed to open the safety valve against
opposing spring force? - ✔✔707 lbs
✔✔What is the purpose of a siphon on a steam pressure gauge? - ✔✔to protect the
gauge from high steam pressure
✔✔Water hammer (or other fluid hammer) is a dangerous condition that could result in:
- ✔✔Lead to total failure of the piping hangers and support structures.
✔✔A boiler produces 500 psi steam at 625 degrees F, normal saturated steam
condition is 467 degrees F, what is the degree of superheat? - ✔✔158 degrees F
✔✔A "water hammer" condition in a steam plant is dangerous because it can: - ✔✔lead
to steam pipe failure
✔✔Which of the following best defines saturated steam? - ✔✔steam at a temperature
corresponding with its pressure
✔✔Which of the following is not an advantage of steam heating systems? - ✔✔only
small pumps are needed to move steam.
✔✔What is the function of the thrust bearing on a steam turbine? - ✔✔to maintain the
radial position of the rotor
✔✔What is the horsepower rating of a 10,000-kW steam turbine? - ✔✔13,400 hp
✔✔What is the theoretical cycle of a simple power plant? - ✔✔Rankine cycle
✔✔What is the stationary passage of an impulse turbine called? - ✔✔nozzle
✔✔What prevents superheater tubes from warping or burning out? - ✔✔by keeping a
continuous flow of steam through the superheater tubes
✔✔What type of turbine allows for the reclaiming of condensate for use in the system? -
✔✔a condensing turbine
✔✔In a high-pressure steam plant, in which type of condenser would the cooling water
and steam come into direct contact? - ✔✔an open type
✔✔On a turbine driven feedwater pump, identify which two pipes are larger? -
✔✔turbine steam exhaust and pump suction lines
ANSWERS SURE A+
✔✔If one atmosphere is about 14.7 psia what is the standard barometer reading at sea
level equal to? - ✔✔760 mm. Hg
✔✔If steam were reduced by a PRV from 500 psi to 125 psi, the steam at 125 psi would
have: - ✔✔the same heat as at 500 psi
✔✔In steam piping, which type of steam trap has no moving parts? - ✔✔the continuous
flow type
✔✔On a steam boiler in order to prevent the generation of steam greater than the
maximum working pressure requires activation of what device? - ✔✔The high steam
pressure limit control
✔✔The ASME code requires more than one safety valve on a boiler, when the boiler
has: - ✔✔over 500 square feet of heating surface
✔✔In what units of measurement are vaporstat type pressure switches calibrated in? -
✔✔inches of water
✔✔The steam pressure on a safety valve act upon upper side of the valve disc, which is
held down upon the seat by a spring that pushes down. - ✔✔false
✔✔Steam at 100 psi and 400 degrees F would be considered: - ✔✔superheated steam
✔✔How often should the safety valves on a power boiler be test blown? - ✔✔at least
once a month
, ✔✔A boiler with an MAWP of 150 psi and a safety valve setting of 100 psi with a 3"
valve disc - what would be the total force needed to open the safety valve against
opposing spring force? - ✔✔707 lbs
✔✔What is the purpose of a siphon on a steam pressure gauge? - ✔✔to protect the
gauge from high steam pressure
✔✔Water hammer (or other fluid hammer) is a dangerous condition that could result in:
- ✔✔Lead to total failure of the piping hangers and support structures.
✔✔A boiler produces 500 psi steam at 625 degrees F, normal saturated steam
condition is 467 degrees F, what is the degree of superheat? - ✔✔158 degrees F
✔✔A "water hammer" condition in a steam plant is dangerous because it can: - ✔✔lead
to steam pipe failure
✔✔Which of the following best defines saturated steam? - ✔✔steam at a temperature
corresponding with its pressure
✔✔Which of the following is not an advantage of steam heating systems? - ✔✔only
small pumps are needed to move steam.
✔✔What is the function of the thrust bearing on a steam turbine? - ✔✔to maintain the
radial position of the rotor
✔✔What is the horsepower rating of a 10,000-kW steam turbine? - ✔✔13,400 hp
✔✔What is the theoretical cycle of a simple power plant? - ✔✔Rankine cycle
✔✔What is the stationary passage of an impulse turbine called? - ✔✔nozzle
✔✔What prevents superheater tubes from warping or burning out? - ✔✔by keeping a
continuous flow of steam through the superheater tubes
✔✔What type of turbine allows for the reclaiming of condensate for use in the system? -
✔✔a condensing turbine
✔✔In a high-pressure steam plant, in which type of condenser would the cooling water
and steam come into direct contact? - ✔✔an open type
✔✔On a turbine driven feedwater pump, identify which two pipes are larger? -
✔✔turbine steam exhaust and pump suction lines
