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