Answer:
Titanium Alloy
Explanation:
Length ( L ) = 20 mm
D1 = 20 mm
d2 = 18 mm
l = 20 mm
Mechanical efficiency = 50%
power = 80 kW
cutting rake angle = 0°
cutting speed ( v ) = 10 m/s
<u>Determine the material to be for the cylinder </u>
In order to choose a material for the cylinder we have to calculate the cutting force
P = Fc * V
80 = Fc * 10 m/s
therefore Fc = 80 / 10 = 8 N
Hence the material we can use is Titanium Alloy due to low cutting force value
The Answer Is C. A collection of computer programs or applications along with its related data
Hope this helps
Answer:
Re=100,000⇒Q=275.25 
Re=500,000⇒Q=1,757.77
Re=1,000,000⇒Q=3060.36 
Explanation:
Given:
For air
=25°C ,V=8 m/s
For surface
=179°C
L=2.75 m ,b=3 m
We know that for flat plate
⇒Laminar flow
⇒Turbulent flow
<u> Take Re=100,000:</u>
So this is case of laminar flow

From standard air property table at 25°C
Pr= is 0.71 ,K=26.24
So 
Nu=187.32 (
)
187.32=
⇒h=1.78
heat transfer rate =h
=275.25 
<u> Take Re=500,000:</u>
So this is case of turbulent flow


Nu=1196.18 ⇒h=11.14 
heat transfer rate =h
=11.14(179-25)
= 1,757.77
<u> Take Re=1,000,000:</u>
So this is case of turbulent flow


Nu=2082.6 ⇒h=19.87 
heat transfer rate =h
=19.87(179-25)
= 3060.36 
Check them to see if the cylinder is running rich or lean. This can be determined by looking at the electrodes on the plugs
Hope this helps.