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 1 / 4
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
- 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 2 / 4
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 3 / 4
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
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