Question 1
A round bar is loaded in pure tension with a force F = 50 kN. The bar diameter is 25 mm. What is the normal stress in the bar?
Correct Answer:
102 MPa
Question 2
A 2D stress element has sigma_x = 80 MPa, sigma_y = -40 MPa, and tau_xy = 30 MPa. What is the maximum principal stress?
Correct Answer:
87 MPa
Question 3
For the same stress state (sigma_x = 80 MPa, sigma_y = -40 MPa, tau_xy = 30 MPa), what is the maximum in-plane shear stress?
Correct Answer:
67 MPa
Question 4
A ductile steel has yield strength Sy = 350 MPa. A part experiences principal stresses sigma_1 = 200 MPa, sigma_2 = 100 MPa, sigma_3 = 0. Using the distortion-energy (von Mises) criterion, what is the factor of safety against yielding?
Correct Answer:
2.0
Question 5
Using the maximum-shear-stress (Tresca) criterion with the same principal stresses (sigma_1 = 200, sigma_2 = 100, sigma_3 = 0 MPa) and Sy = 350 MPa, what is the factor of safety?
Correct Answer:
1.75
Question 1
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About this Exam

Prepare with the PE Mechanical Machine Design Practice Questions - PE Mechanical Machine Design and Materials Exam practice quiz. This question bank includes 100 questions covering sigma, stress, factor, steel, and diameter. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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PE Mechanical Machine Design Practice Questions - PE Mechanical Machine Design and Materials Exam

This practice set contains 100 questions from the matching question bank and focuses on sigma, stress, factor, steel, and diameter. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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