Materials Science and Manufacturing Engineering Miscellaneous
Direction: In orthogonal turning of a bar of 100 mm diameter with a feed of 0.25 mm/rev, depth of cut of 4 mm and cutting velocity of 90 m/min, it is observed that the main (tangential) cutting force is perpendicular to the friction force acting at the chip-tool interface. The main (tangential) cutting force is 1500 N.
- The normal force acting at the chip-tool interface in N is
-
View Hint View Answer Discuss in Forum
NA
Correct Option: B
NA
- The orthogonal rake angle of the cutting tool in degree is
-
View Hint View Answer Discuss in Forum
NA
Correct Option: A
NA
- Which of the following process can be used for welding of Aluminum alloys?
P. Submerged arc welding
Q. Gas metal arc welding
R. Electroslag welding
S. Gas tungsten arc welding
-
View Hint View Answer Discuss in Forum
To remove the ceramic layer of aluminium oxide, TIG is used.
Correct Option: B
To remove the ceramic layer of aluminium oxide, TIG is used.
Direction: A weld is made using MIG welding process with the following welding parameters:
Current: 200 A: Voltage: 25 V; Welding speed: 18 cm/min; Wire diameter: 1.2 mm; Wire feed rate: 4 m/min. Thermal efficiency of the process: 65%
- The area of cross-section of weld bead in mm² is
-
View Hint View Answer Discuss in Forum
Volume of weld
= π d2 × V 4 = π (1.2)2 × 4000 4
= 4521.6 mm3/min
Area of weld = 4521.6 = 4521.6 = 25.12mm2 speed 18 × 10 Correct Option: B
Volume of weld
= π d2 × V 4 = π (1.2)2 × 4000 4
= 4521.6 mm3/min
Area of weld = 4521.6 = 4521.6 = 25.12mm2 speed 18 × 10
- The heat input per unit length of the weld in kJ/cm is
-
View Hint View Answer Discuss in Forum
Current = 200A
Voltage = 25 V
dw = 1.2 mm
Fr = 4 m/min
= 4000 mm/min
V = 18 cm/min
= 180 mm/min.
ηTh= 65%
Heat Input per unit length= V × I × η = 200 × 25 × 0.65 = 10.833 kJ/cm speed 18/60 Correct Option: C
Current = 200A
Voltage = 25 V
dw = 1.2 mm
Fr = 4 m/min
= 4000 mm/min
V = 18 cm/min
= 180 mm/min.
ηTh= 65%
Heat Input per unit length= V × I × η = 200 × 25 × 0.65 = 10.833 kJ/cm speed 18/60