Toolz & Skillz

Question 1

philips screwdriver sizes number from what to what

Answer 1

0 - #4

Question 2

robertson screwdriver color and types

Answer 2

yellow #0
green #1
red #2
black #3

Question 3

type of file (three sides with triangle base)

Answer 3

3 square file

Question 4

wet bulb declination

Answer 4

Wet bulb declination: The difference in temperature between the wet bulb temperature and the dry bulb temperature. It is used to determine the humidity of the air.

Question 5

Tubes vs pipes

Answer 5

Tube = constant inner diameter
Pipe = constant tube diameter

Question 6

What are the 2 common copper pipe wall thickness and their colours.

Answer 6

L-type Blue and K-type Green

Question 7

What is thread engagement

Answer 7

The length of the fitting used to thread

Question 8

What is the throw of a fitting?

Answer 8

The measurement used to indicate the angle of the fitting

Question 9

What is 95/5 solder

Answer 9

95% tin and 5% antimony
Used to join copper to either steel or brass

Question 10

What is silver alloy wire

Answer 10

45% silver

Question 11

What is silver brazing rod 15

Answer 11

85% copper and 15% silver with phosphorus as a flux (silfos)
Rod 5 is used for plumbing

Question 12

What’s 50/50 solder

Answer 12

Aluminum and lead

Question 13

The crests are further apart for UNC threads than NPT

Answer 13

True