Machine Design

1. The torsional deflection of SAE 1040 steel shaft is 0.8 deg. in a length of 500 mm. The shear stress is 69 Mpa. Compute the diameter of the shaft if the steel modulus of elasticity is 79,300 Mpa.

51

75

62

50

2. For shafting, alloy steel is for high strength requirements, what material to be used for commercial purposes.

Stainless steel

Mild steel

Carbon steel

Nickel steel

3. A vertical load of 400N acts at the end of a horizontal rectangular cantilever beam 2-m long and 25-m. If the allowable bending stress is 130,000 kPa, find the depth of the beam?

34.83 mm

40.4 mm

38.43 mm

39.44 mm

4. What kind of stress experienced by a pressurized vessel.

Shear stress

Tensile stress

Bending stress

Compressive stress

5. A hollow shaft must carry a torque of 3,400,000 N-mm at a shearing stress of 55 Mpa. The inside diameter is to be 0.65Do. Find the outside diameter?

82 mm

75 mm

76 mm

73 mm