Copper pipe and soldering

What is soldering

The process of joining metal parts to form a mechanical bond

What colour code does type m copper use

Red

What colour code does type L copper use

Blue

What is type m copper used for

For above-ground applications

Type m only comes in hard temper- true? Or false?

True

What is type l copper used for

General plumbing and heating systems

Where can type k copper be used

Underground

What can type k copper be used for

General plumbing, heating and gas lines

What does DWV stand for I'm copper piping

Drain, waste and vent

DWV is only approved for waste management and cannot be used in a pressurized system- true? Or false?

True

What is the chemical formula for acetylene gas

C2h2

What is a b tank filled with to stabilize the acetylene inside

Acetone

What is the pressure of a b tank

250 psi

What is the safety mechanism on a b tank

Fusible plug

What is the purpose of a fusible plug

Operates as a safety valve when the tank reaches a dangerous temperature

What is the purpose of a pressure regulator

Reduces high pressure in the b tank to a safer pressure

How do you increase the pressure on a b tank using the regulators

Turn the knob clockwise to increase the pressure

What two sizes do acetylene hoses come in

12' and 24'

What are "grade r" acetylene hoses made of

EPDM rubber hose

What is the only use for a presto-lite torch?

Soft solder

a presto-light torch produces less heat then a turbo torch. True? Or false?

True

A presto light torch cannot be used for brazing. True or false?

True

What two gasses can be used with a turbo torch

MAPP and acetylene

What gas is safer at high temp? MAPP gas or acetylene gas?

MAPP gas

Can a turbo torch be used for brazing? True or false?

True

What pressure is acetylene the gas unstable

15 psi

What safe pressure range are b-tank regulators set too?

1-13 psi

What is the purpose of solder

To create a permanent bond between the metal

What is the solder used for potable drinking water applications?

Lead free wire solder

What is the chemical make up of lead free solder

95% tin and 5% antimony

What is 50/50 solder used for

DWV systems

What is the chemical make up of 50/50 solder

50% tin and 50% lead

What happens if you don't ream your pipe before installation?

Creates turbulence in the pipe and premature erosion

What is the benefit of reaming pipe

Maintains linear flow within the pipe

You must always clean the pipe before soldering. True or false?

True

You must always wipe the pipe after soldering and the pipe has cooled, true or false??

True

What is the purpose of flux

Remove oxides from the pipe and fittings

When cutting copper is it good to cut slow or fast

Slow

Does adnan do heroin In class occasionally

Sometimes he do dat shi