DEFORMA

What is the maximum thickness of a steel plate in which a 4.2 inch diameter hole can be drilled? Assume that for this material, the maximum shearing strength is 50 ksi and the maximum compressive strength is 60 ksi

• 1.26 in

• 1.53 in

• 2.23 in

• 2.87 in

Solve for the smallest hole diameter that can be drilled on a plate with maximum shear strength of 50 ksi and a maximum compressive strength of 60 ksi. Assume that the thickness of the plate is half an inch.

• 1.22 in

• 1.67 in

• 2.45 in

• 2.88 in

What is the diameter of a bolt if it is used to join two steel bars together under a tensile force of 10 kN if the maximum bearing stress is 55 MPa? Assume that the thickness of the plate is 10 mm.

• 1.5 mm

• 1.8 mm

• 2.3 mm

• 2.9 mm

Determine the outside diameter of a hollow steel tube that will carry a tensile load of 500 kN at s tress of 140 MPa. Assume the wall thickness to be one-tenth of the outside diameter.

• 111.3 mm

• 109.7 mm

• 113.7 mm

• 112.4 mm

Determine the diameter of a steel road that will carry a tensile load of 50,000 kg at a stress of 1400 kg per square centimeter.

• 5.78 cm

• 6.74 cm

• 8.32 cm

• 7.46 cm

An iron column of annular cross-section has an outer diameter of 200 mm and is subjected to a force of 75 kN. Find the thickness of the wall if the allowable compressive stress is 10 MPa.

• 12.75 mm

• 12.57 mm

• 17.75 mm

• 15.75 mm

Determine the maximum thickness of metal plate in which a 7.5 cm diameter hole can be punched. If the plate has an ultimate shearing strength of 4245 kg per square centimeter and the punch can exert a maximum force of 200 metric tons.

• 1.8 cm

• 1.5 cm

• 2.0 cm

• 2.2 cm

The allowable tensile stress for ¼ -20 bolt of a thread length 7/32 in. is 30,000 psi. The allowable shear stress of the material is 15,000 psi. Where and how will such a bolt be most likely to fall? Note: Assume threads are perfectly triangular and that the force is carried at the mean thread height.

• At the root diameter due to tension

• At the root diameter due to shear

• At the thread due to tension

• At the thread due to shear

A single bolt is used to lap joint two steel bars together. Tensile force on the bar is 20,000 N. Determine the diameter of the bolt required if the allowable shearing stress on it is 70 MPa.

• 25 mm

• 19 mm

• 15 mm

• 12 mm