Manufacturing Engineering - 1 - Mechanical Engineering MCQ

Hot press forging

Metals like lead and tin are hot worked at temperature around

Ultrasonic machines, used in material removal processes, require ultrasonic transducers. The transducers work on different working principle. One of the working principles of such ultrasonic transducers is based on

A sheet with a cross sectional area of 150 × 6 mm2 is being rolled with 20% reduction of are using 400 mm diameter steel rolls, σ yi= 0.35 MPa, σ yf = 0.4 MPa, velocity of Roller = 30 m/min. Find the draft (mm) and angle byte.

A ball of 10 mm diameter is reduced to 8 mm by extrusion. Take σ y− 250 MPa, vbullet = 50 mm / s ; length of bullet = 75 mm . Find power required for this process

A cylindrical bullet of 100 mm diameter is forged from a 50 mm height to 40 mm. The material has a constant flow stress of 80 MPa.

Q.

Find the work of deformation

A cylindrical bullet of 100 mm diameter is forged from a 50 mm height to 40 mm. The material has a constant flow stress of 80 MPa.

Q.

If a 10 kN drop hammer is used to complete the reduction in one blow, what will be the height of the fall?

The fore required to draw a 25 mm × 6 mm copper strip to 45% reduction of area using 12° included angle dies is (µ = 0.07 )

The maximum punch force required in punching a 30 mm diameter hole through 3 mm thick annealed aluminum alloy sheet at room temperature is (Take ultimate tensile strength of aluminum alloy as 1000 Mpa)

In charpy test specimen, the angle of v-notch section is

The stain ratio that can expect from a sheet metal when stretched by 26% in length, decrease in thickness by 12% is

A round rod of annealed bras 70-30 is being drawn from a diameter of 8 mm to a diameter of 4 mm at a speed of 0.8 m/s. (k = 895 MPa, n = 0.49)

Q. The drawing force required in this operation is