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WorksheetsChapter III: Steam Boiler Fittings
Total questions: 25
Worksheet time: 6hrs 15mins
To prevent failure from pressure over the MAWP, all steam boilers must be equipped with at least one ___
Safety Valve
Blowdown Valve
Gauge Glass
Feedwater Heater
The purpose of a control safety valve is to ___
Control the Boiler at Operating Range
Control High or Low Water
Prevent the Boiler from Exceeding its MAWP
Control High and Low Fire
Safety valves are designed to ___
Open Slowly to Prevent Water Hammer
Pop Open
Open Only By Hand
Be Opened by Pressure Controller
When testing a safety valve manually, there must be ___
At Least 75% of the Safety Valve Popping Pressure on the Boiler
No Boiler Pressure
An Inspector Present
A Pressure Greater Than the Safety Valve Popping Pressure on the Boiler
Any repairs to the safety valve must be done by the ___
Chief Engineer
State Inspector
Manufacturer-Authorized Representative
Maintenance Department
A(n) ___ test is used to test the relief capacity of a safety valve
Accumulation
Try Lever
Blowdown
Bench
___ pressure is the pressure caused by the weight of the column of water
Pump
Hydrostatic
Steam
Suction
A cyclone separator is a cylindrical device that separates water droplets from steam using ___
Pressurized Steam
Pressurized Air
Centrifugal Force
Automatic Non-Return Valves
A steam pressure gauge must be protected by a siphon to prevent ___
Steam From Entering the Mud Drum
Boiler Pressure From Damaging the Gauge
Air From Entering the Bourdon Tube
Steam From Damaging the Gauge
The correction factor for hydrostatic pressure is ___ psi per vertical foot
0.433
8.3
14.7
34.5
The Boiler Vent is Open When Warming Up A Boiler Until ___
The Boiler is Cut In On-Line
There is 10 PSI to 25 PSI of Steam Pressure on the Boiler
The Superheater Drain Is Closed
The Boiler Begins To Overheat
Separators Work on the Basic Principle of ___
Potential Energy
Pressure Drop Separation
Trapping Steam and Letting Water Through
Changing the Direction of the Steam Flow
The dry-pipe separator is located in the ___
Upper Part of the Steam Drum
Superheater Outlet Header
Main Steam Line
Line Before the Turbine Throttle
The ASME Code states that high pressure boilers in battery (two or more boilers connected to a common header) and equipped with manhole openings must have ___
One Main Steam Stop Valve
Two Main Steam Stop Valves
No Valve Between the Boiler and Header
One Ball Valve Between the Boiler and Header
A main steam stop valve should be a(n) ___ valve
OS&Y Gate
OS&Y Globe
Quick-Closing Lever
Plug
Boiler safety valves are placed at the highest part of the ___
Water Drum
Boiler Vent
Steam Siphon
Steam Space
During boiler inspection, the main steam stop valves are ___
Left Fully Open
Closed, Locked, and Tagged
Left Partially Open
Replaced With Globe Valves
A pressure gauge must be recalibrated if it is not accurate to within __% of the working pressure
0.5
1
2
3
During normal usage, ___ are used to allow for the expansion and contraction of the main steam line
Flanged Fittings
Welded Braces
Expansion Bends
Rigid Pipe Hangers
A main steam stop valve should be a gate valve because a gate valve ___
Can Be Opened in 1/4 Turn
Can Be Used as a Throttling Valve
Offers No Resistance to the Flow of Steam
Does Not Have To Be Fully Open
A Safety Valve Must Be Capable of Discharging All the Steam Without the Pressure Increasing More Than __% Above the Maximum MAWP
1
6
14.7
25
A safety valve opens when the ___ exerted by the steam exceeds that of the spring
Total Force
Temperature
Area Gain
Huddling Chamber Force
___ fittings are used for water columns operating above 350 psi
Cast Iron
Malleable Iron
Steel
Brass
The ___ is the part on a safety valve that increases the area of the safety valve disc
Bonnet
Huddling Chamber
Body
Popping Valve
Boiler fittings are necessary for ___
Appearance
Efficiency
Aesthetic Purposes
Controlling Air Flow
