Steam Gen & Boiler Feedwater Systems
To deliver steam
What is the basic objective of a boiler?
(Chapter 8, Slide 3)
Expansion loop, letdown stations, & drip legs
What are components of a steam distribution system?
(Chapter 9, Slide 4)
Emergency generators and battery systems
What are two major types of backup power systems?
(Chapter 10, Slide 12)
Equipment whose voltage is designed not to generate sparks.
What is intrinsically safe?
(Chapter 10, Slide 20)
**DAILY DOUBLE**
It’s not as expensive as other forms of energy
Why do refineries and petrochemical plants use steam?
(Chapter 8, Slide 4)
It can carry more energy because of its increased temperature
What is a benefit of superheated steam?
(Chapter 9, Slide 5)
Ohm
What is the measure of resistance in a wire?
(Chapter 10, Slide 6)
Coal
What is a solid boiler fuel?
(Chapter 8, Slide 21)
The water in the tubes absorbs most of the radiant heat
What is an advantage to a waterwall?
(Chapter 8, Slide 9)
Meet the design pressure of the equipment.
What is a reason for steam pressure letdown?
(Chapter 9, Slide 8)
Step up or step down the voltage
What is a transformer?
(Chapter 10, Slide 7)
Drums will overheat, tubes will weaken, tubes and drums may eventually rupture.
What is the consequence of a boiler running dry?
(Chapter 8, Slide 22)
They are usually located just ahead of the stack
What is an induced-draft auxiliary fans?
(Chapter 8, Slide 17)
Generates high velocities, causes wear inside valves and high noise levels.
What is the danger in reducing steam pressure too quickly?
(Chapter 9, Slide 7)
A drop in voltage that will start backup generators, burn up electric motors, and cause loss of instrumentation.
What is a brownout?
(Chapter 10, Slide 9)
**DAILY DOUBLE**
The measure of the current’s rate of flow
What is an ampere?
(Chapter 10, Slide 6)
Main boiler steam header
What transfers steam from the boiler into the steam distribution system?
(Chapter 8, Slide 19)
A mechanical seal that retains vapor but passes on liquid.
What is a steam trap?
(Chapter 9, Slide 11)
480 Volts
What is the most common voltage for electric motors?
(Chapter 10, Slide 4)
Used to switch from one electrical circuit to another.
What is a switchgear?
(Chapter 10, Slide 7)