Various Mem Flashcards
Wrench for 1/4 “ bolt
7/16 or 3/8
Wrench for 5/16” bolt
1/2
Wrench for 3/8” bolt
9/16
Wrench for 7/16” bolt
5/8
Wrench for 1/2 “ bolt
3/4
Wrench for 9/16 “ bolt
13/16
M10 x 1.5 x 50
Each are :
M = metric
10 = diameter in mm
1.5= pitch
50 = length
3/8 - 16 UNC x 4
Each is
3/8 = diameter in inches
16 = threads per inch
UNC= course thread
4 = lenth
1/2 - 24 UNF × 6
EACH IS
1/2 = diameter in inches
24 = threads per inch
UNF = fine thread
6 = bolt length
1/2 or 3/4 inch pipe
1) # of threads per inch
2) # length of threads to be cut
1)14
2)10.5
1” to 2” pipe
1) threads per inch
2) length of threads to be cut
1)11.5
2)1”
of wraps for Teflon tape
2
Capacitance symbol and unit
U: farad (F)
S: C
Inductance unit and symbol
U: henry (H)
S: L
Capacitance constant
8.85 x 10 ^-12
Capacitance in farads calc
C = (cap const) Er A/d
Cap const : 8.85 × 10^-12
Er : relative perm of dielectric
A : area of plate in m^2
d : distance between plates m
What is schedule of pipe
How thick the wall is
Min # of teeth engagement on a hacksaw
2
A good solder joint is
Shiny
Primary standard is a
Physical standard
Efficiency formula
Power out/power in x 100
Who’s law is with springs?
Hookes
To convert cm^3 to m^3 you
÷ by 1,000,000
Or 10 ^ -6
Def: natural convection
Density differences drive heat circulation
Forced convection
Circulation is forced by a pump or a fan
It takes ____ kj of energy to raise 1 kg of water 1 degree c
4.186 kj
Weight of 1 cubic meter of water
1000 kg or 1 tonne
