Valves and devices
What is the most common valve?
Ball valve
what is a offset?
A combination of elbows or bends to move a pipe out of line.
What are the four jointing methods on copper pipe?
Solder, Braze, compression, and pro press.
How many theory and code hours for plumbing and gas do you need for your journeyman exam?
You need 550 hours of plumbing and gas theory and code.
If you have a 1 1/2" CL-CL piece of pipe with a take out of 3/8" what is the final measurement?
The final measurement would be a 3/4" pipe.
what are all the parts of a valve?
Handle, stem, packing nut, bonnet, gate, body, seat.
What is the definition of backflow?
The flow of water or other liquids of a potable water source mixed with any waist or water from a non potable water source.
Yes, they sell glue with primer in it, but it is not code legal in Mass.
How many teirs/ hours can you obtain of code and theory in a tech school?
You can get three teirs or 330 hours of code and theory in a tech school.
What is the formula to find the Aria if you have the diameter?
A= D2/4 pie
What is an OSY valve and what are the other names of this valve? As well as the use for this valve?
This is and Outside stem and yoke valve and can also be called a dead mans valve or a rising steam valve.
What is basic principle 9 of the Massachusetts 247 CMR plumbing code?
The need for traps in the plumbing drainage system.
What are the two types of threaders we use in this shop?
We use the ridged 535 and the ridged 300.
You need 1,700 more hours of work experience and no you do not need to complete any other teirs.
what is the formula to find thermal expansion? And if you are using copper pipe what is the constant?
The formula is L*temp change* constant.
Constant = .000113
What are the 5 things to consider when choosing a valve?
consider the systems pressure, how long the system takes to respond, how much pressure is required to open the valve, consider whether the valve is normally open or closed, and any valve can come in any connection.
What is the definition of a dead end?
A branch on a potable water system Witch dose not contain an accessible isolation valve located within 5" of the main and is capped.
What are the two types of cast iron connections?
What is the form the veterans with honorable discharge need to have to be able to mass the jornysmans test with a 65% instead of a 70%?
This form is called a DD-247.
what is the formula for a rolling 45 degree offset?
square root of S2+R2 * 1.414
S= set R=roll
What type of valve is at a pich and leads outside of a house?
An anti freeze silcock.
What is Basic principal 6 of the Massachusetts 247 CMR plumbing code? and how many dwellings till you need a washing machine for elderly housing?
Required plumbing fixtures, and you need a washer every 20 dwelling units for elderly housing.
What is capillary action and what plumbing connections use it?
Capillary action is when something cold goes to hot (like a liquid). And is used in soldering, Brazing and led and oakum connections.
Do plumbing inspectors have the same continuing ed material?
No their continuing ed is different and includes different material.
What is the type of pressure from the top down?
This is called head pressure.