Describe how pressure builds inside the system.
What will be an ideal response?
Pressure builds through the natural expansion of water to steam. Steam can be raised to higher temperatures as it comes into contact with higher temperatures in the superheated tubes. The upper steam drum has a large vapor disengaging cavity that is specifically designed to build pressure since vapors are much more compressible than liquid. A pressure control valve is located on the steam outlet line and is designed to control system pressures. When the desired set point is achieved, the steam generator is “placed on the line.” Pressure is maintained in the boiler by adding makeup water and continuously applying heat.
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What should happen when a security monitoring device is activated? Select all that apply.
A) The event should be recorded. B) The event should be annunciated in an appropriate way. C) There should be a telecon to the local fire department.
Amphibians use their skin to ____________________, so they can breathe directly through their skin
Fill in the blank(s) with correct word
How does a vented room gas heater differ from an unvented room gas heater?
What will be an ideal response?
When do the switches on a contactor change position?
A) When both the coil and switches are energized B) When they are energized C) When the coil is energized D) When either the coil or the switches are energized