Q1.For the configuration shown, the angular velocity of link AB is 10 rad/s
counterclockwise. The magnitude of the relative sliding velocity (in ms-1) of slider
B with respect to rigid link CD is
Answer : Option DExplaination / Solution: No Explaination.
Q2.Two pipes of inner diameter 100 mm and outer diameter 110 mm each are joined
by flash-butt welding using 30 V power supply. At the interference, 1 mm of
material melts from each pipe which has a resistance of 42.4Ω. If the unit melt
energy is 64.4 MJm-3, then time required for welding (in s) is
Answer : Option CExplaination / Solution: No Explaination.
Q5.In a shear cutting operation, a sheet of 5mm thickness is cut along a length of 200mm.
The cutting blade is 400mm long and zero-shear (S=0) is provided on the edge. The
ultimate shear strength of the sheet is 100MPa and penetration to thickness ratio is 0.2.
Neglect friction.
Assuming force vs displacement curve to be rectangular, the work done (in J) is
Answer : Option AExplaination / Solution: No Explaination.
Q6.In a shear cutting operation, a sheet of 5mm thickness is cut along a length of 200mm.
The cutting blade is 400mm long and zero-shear (S=0) is provided on the edge. The
ultimate shear strength of the sheet is 100MPa and penetration to thickness ratio is 0.2.
Neglect friction.
A shear of 20mm (S=20mm) is now provided on the blade. Assuming force vs
displacement curve to be trapezoidal, the maximum force (in kN) exerted is
Answer : Option DExplaination / Solution: No Explaination.