When cooling down a steam boiler that has been taken out of service, a vent valve on the steam drum should be opened to a) prevent a vacuum from forming in the boiler b) release the air from the boiler c) purge the shell of impure gases d) let the operator know when the pressure has reached zero e) prevent pressure build-up in the boiler
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Read MoreThe size of the saddles shall be as follows: Pipe to 3" 4" to 6" 8" and larger 24 gauge x12" long 18 gauge x 12" long 16 gauge x 12" long 2.04 VALVES 15050-4 11/17 BASIC MATERIALS AND METHODS 2.05 A. Valves shall be of an approved type and shall meet the requirements for the pressure and temperature at which they are to be
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Read MoreWhat is the purpose of the high limit control on a hot water boiler? Choose one answer. a. To stop the boiler if the water level control fails. b. To act as a emergency stop for the operator c. To shut down the burner if the water temperature exceeds 121 deg C. d. To prevent the pressure in the boiler rising above 210 kPa gage. e.
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Read MoreEXPERIMENTAL TECHNIQUES AND EQUIPMENT The main pilot-scale equipment has been described previously; it comprises: 1. A firetube boiler capable of generating 8000 Ib/hr of steam at 100 psi, with a 48-inch diameter cross-section fluid bed. 2. A fully cooled pilot-scale combustor with a 27-inch diameter bed cross- section. 3.
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