The effect of rake angle on the mean friction angle in machining can be explained by

Q. In an orthogonal cutting test on mild steel, the following data were obtained
Cutting speed : $40m/min$
Depth of cut : $0.3mm$
Total rake angle : $+5^o$
Chip thickness : $1.5mm$
Cutting force : $900N$
Thrust force : $450N$
Using Merchant's analysis, the friction angle during the machining will be

Q. In an orthogonal machining operation,
if U = specific cutting energy, $\beta =$ friction angle, $\varphi =$ shear plane angle, $\alpha =$ Tool rake angle, then the shear stress $\left(\tau \right)$ will be expressed as:

Q. In an orthogonal cutting test, the following observation were made
Cutting force $=1200N$
Thrust force $=500N$
Tool rake angle $=zero$
Cutting speed $=1m/s$
Depth of cut $=0.8mm$
Chip thickness $=1.5mm$

Friction angle during machining will be

Q. A cutting tool can be designated as:
$5-8-12-9-25-53-0.2$ mm.
(ORS) is used for machining. The normal rake angle of the tool is

Q. Effects of increase in Positive Back Rake angle are

1. 1, 3
2. 2, 3, 4
3. 3, 4, 1
4. 1, 2, 4