City Guilds Model Questions Vol1 2024 Engineering Question 28

Practice objective / multiple choice question 28 from the 2024 City Guilds Model Questions Vol1 Engineering examination.

City Guilds Model Questions Vol1 2024 Engineering Objective / Multiple Choice Medium Difficulty
Question 28 CITY_GUILDS_MODEL_QUESTIONS_VOL1 • 2024 • ENGINEERING • objective

A solid circular steel shaft of diameter 40 mm is subjected simultaneously to a bending moment of 500 N·m and a torsional moment of 300 N·m. The material has a yield strength of 250 MPa and an ultimate strength of 460 MPa. Using the von Mises criterion, determine whether the shaft is safe when a factor of safety of 2 is required. If it is not safe, calculate the maximum permissible bending moment (in N·m) that can be applied while the torsional moment remains unchanged.

Answer Options

Correct Answer A. Safe (equivalent stress 89.7 MPa < allowable 125 MPa); limiting bending moment ≈ 741 N·m
B. Safe (equivalent stress 89.7 MPa < allowable 125 MPa); limiting bending moment ≈ 800 N·m
C. Unsafe (equivalent stress 130 MPa > allowable 125 MPa); limiting bending moment ≈ 600 N·m
D. Unsafe (equivalent stress 89.7 MPa > allowable 125 MPa); limiting bending moment ≈ 741 N·m
Correct Answer
A
Correct Option:
Safe (equivalent stress 89.7 MPa < allowable 125 MPa); limiting bending moment ≈ 741 N·m

About This Question

This is City Guilds Model Questions Vol1 2024 Engineering Question 28. It is one of the objective questions from the 2024 City Guilds Model Questions Vol1 Engineering examination.

Difficulty level: Medium .

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