Practice Questions Builder Already Graded A+

Practice Questions Builder Already Graded A+ Globe Valve A valve that should be used for throttling is a? 30-70 what is the acceptable range for residual sodium sulfite in the boiler maintain? 146,000 what is the BTU content of a Gallon of #4? Brine what does a zeolite water softener system use as a means of regeneration? Backwash, what are the steps for a Zeolite rejuvenation water softener process? Condenser Where is medium temperature liquid found in a refrigeration cycle ? Discharge line of the compressor Where is high temperature vapor found in a refrigeration cycle? Diagonal Stays what stays are used to support the burner chamber in a scotch marine boiler? Grounding Conductor What wire connects all components of a system to physical ground or water pipe? By opening the quick opening valve first and closing it last high pressure boilers equipped with a quick opening valve and a slow opening valve are blown down how? every 8 hours (once a shift) How often should the water level in the boiler be checked over a 24 hour period? Annually How often is the high limit switch on a boiler tested? Every 8 hours (once a Shift) How Often is an external inspection of a boiler performed? Shutdown Burner What is the first thing to do when shutting down a Boiler? Every 8 hours (once a shift) How often should the flow control be blown down Every 8 hours (once a shift) How often should the low level cutoff be tested To Lubricate components within the refrigeration cycle why is oil added to the refrigerant the same system or other system owned by the same person with restriction Refrigerant that is recovered can be returned to? Stamp or Approval Data printed on the equipment nameplate includes the manufacturer, model, serial number and ___________? 1 BTU How many BTU's does it take to rise 10lbs of steam from 40° to 41°? every 8 hours (once a shift) How often should permits be required when working on a Boiler? 3 : over pressure, Over heating, & Fire side Explosions How many things do safety controls protect against? Calcium Sulfate & Magnesium Carbonate What chemical compounds in water cause permanent Hardness? Sodium sulfite & hydrazine What chemicals are used to Combat Corrosion Bases You have boiler water that is found to have PH of 5, what compound do you add to neutralize Calcium carbonate & magnesium Carbonate what produces soft scale? Neutralizing amines with normal oxygen and Low alkalinity, what is added to the boiler water? Silica What is hard forming Scale Combined Phosphate treatment what chemicals are used to combat scale Nitrogen What compound does not produce heat? Chlorine With Hydroxide present and normal Oxygen levels which chemical will cause problems in a system? Tube Rattler/Vibrator What mechanical device is used to remove scale from Fire Tubes? A qualified person from Manufacturer or a manufacturer rep. Who can make adjustments or repairs on a safety valve? A Tube Turbine What mechanical device is used to remove scale from water tube boilers? Mixing the air from the hot and cold duct in a mixing box serving the space. * in a duct air handler