High pressure steam test
High Pressure Team Study Guide Test
Containing 280 Questions with Certified
Solutions 2024-2025.
800 psi safety valve, at what pressure does it lift? - Answer: 824 3%
Gauge reads 175psi 45' below where it is connected to the boiler, what is its true
reading? - Answer: 155.5. 45 X 0.433 = 19.50psi 175 - 19.50 = 155.5
1
, High pressure steam test
How often does a welder who works on pressure tanks need to be requalified? -
Answer: 1 year
What is the compression or crushing strength of a steel plate? - Answer: 95,000
psi
BTU's average size plant - Answer: 8500-9500 per one kilowatt hour
What section of ASME boiler and pressure code covers the materials for miniature
boilers? - Answer: Section II
Fitting of bronze, 95% copper, what should it be hydro tested up to? - Answer: 600
psi
Why are fire tube boilers preferred over water tube boilers? - Answer: Lower
initial cost and size
Why are water tube boilers chosen over fire tube boilers? - Answer: Greater
steam capacity
1 pound of water increases by a factor of ________ when turned into steam -
Answer: 1600
What type of power plant does not use steam? - Answer: Hydroelectric or solar
2
, High pressure steam test
What is the minimum range for 3 psi gauge with 2 1/4" diameter - Answer: 5 psi
Benefit of a globe valve? - Answer: Can be throttled to regulate, won't cut valve,
parts easy to repair/replace. Disadvantage is pressure drop
Centrifugal pump has which characteristics? - Answer: Radial, Axial, Mixed
Which is not a characteristic of a centrifugal pump - Answer: Vane, reciprocating,
rotary, special, dynamic, displacement
How are safeties tested on a new boiler? - Answer: Pressurized with steam
How do you calculate the moisture in steam? - Answer: Throttling calorimeter
What is added to water in DA? - Answer: Sodium sulfite, sodium hydroxide
(hydrazine)
Pipes that are not covered by code? - Answer: Clay
5/16"tube thickness w/no bevel or recess should extend how far past the tube
sheet? - Answer: 5/16"
What is this formula (TS x T x E) / (R x FS) = - Answer: Maximum allowable working
pressure, psi
3
, High pressure steam test
Importance of a water column? - Answer: To attach a gauge glass so that a level
can be read easily
Why do we blow down a water column every shift? - Answer: To ensure proper
level reading
Low water level in a boiler causes? - Answer: Overheating of tubes
What removes scale? - Answer: Phosphate, below 1,000 psi
Bad water treatment and scaling would most effect? - Answer: The Cycling of
boilers, startups, handling loads, shutdowns, corrosion and fatigue
Purpose of safety valve on outlet of superheater? - Answer: Protects the
superheater by providing a constant flow of steam after it pops.
What happens to DA returning condensate is hotter than should be? - Answer:
Steam bypass closes
How does DA remove oxygen and non-condensables from water? - Answer:
Bubbling trays, spray, or combination of these, steam, addition of sulfite or
hydrazine and a vent
Before the clean air act (1963) what were people concerned with? - Answer:
Particular matter PM
4
High Pressure Team Study Guide Test
Containing 280 Questions with Certified
Solutions 2024-2025.
800 psi safety valve, at what pressure does it lift? - Answer: 824 3%
Gauge reads 175psi 45' below where it is connected to the boiler, what is its true
reading? - Answer: 155.5. 45 X 0.433 = 19.50psi 175 - 19.50 = 155.5
1
, High pressure steam test
How often does a welder who works on pressure tanks need to be requalified? -
Answer: 1 year
What is the compression or crushing strength of a steel plate? - Answer: 95,000
psi
BTU's average size plant - Answer: 8500-9500 per one kilowatt hour
What section of ASME boiler and pressure code covers the materials for miniature
boilers? - Answer: Section II
Fitting of bronze, 95% copper, what should it be hydro tested up to? - Answer: 600
psi
Why are fire tube boilers preferred over water tube boilers? - Answer: Lower
initial cost and size
Why are water tube boilers chosen over fire tube boilers? - Answer: Greater
steam capacity
1 pound of water increases by a factor of ________ when turned into steam -
Answer: 1600
What type of power plant does not use steam? - Answer: Hydroelectric or solar
2
, High pressure steam test
What is the minimum range for 3 psi gauge with 2 1/4" diameter - Answer: 5 psi
Benefit of a globe valve? - Answer: Can be throttled to regulate, won't cut valve,
parts easy to repair/replace. Disadvantage is pressure drop
Centrifugal pump has which characteristics? - Answer: Radial, Axial, Mixed
Which is not a characteristic of a centrifugal pump - Answer: Vane, reciprocating,
rotary, special, dynamic, displacement
How are safeties tested on a new boiler? - Answer: Pressurized with steam
How do you calculate the moisture in steam? - Answer: Throttling calorimeter
What is added to water in DA? - Answer: Sodium sulfite, sodium hydroxide
(hydrazine)
Pipes that are not covered by code? - Answer: Clay
5/16"tube thickness w/no bevel or recess should extend how far past the tube
sheet? - Answer: 5/16"
What is this formula (TS x T x E) / (R x FS) = - Answer: Maximum allowable working
pressure, psi
3
, High pressure steam test
Importance of a water column? - Answer: To attach a gauge glass so that a level
can be read easily
Why do we blow down a water column every shift? - Answer: To ensure proper
level reading
Low water level in a boiler causes? - Answer: Overheating of tubes
What removes scale? - Answer: Phosphate, below 1,000 psi
Bad water treatment and scaling would most effect? - Answer: The Cycling of
boilers, startups, handling loads, shutdowns, corrosion and fatigue
Purpose of safety valve on outlet of superheater? - Answer: Protects the
superheater by providing a constant flow of steam after it pops.
What happens to DA returning condensate is hotter than should be? - Answer:
Steam bypass closes
How does DA remove oxygen and non-condensables from water? - Answer:
Bubbling trays, spray, or combination of these, steam, addition of sulfite or
hydrazine and a vent
Before the clean air act (1963) what were people concerned with? - Answer:
Particular matter PM
4
