City Guilds Model Questions Vol1 2024 Engineering Question 47

Practice objective / multiple choice question 47 from the 2024 City Guilds Model Questions Vol1 Engineering examination.

City Guilds Model Questions Vol1 2024 Engineering Objective / Multiple Choice Medium Difficulty
Question 47 CITY_GUILDS_MODEL_QUESTIONS_VOL1 • 2024 • ENGINEERING • objective

A solid circular shaft of length 1.2 m and diameter 40 mm must transmit a torque of 500 Nm with a safety factor of 2. Choose between steel (density 7850 kg·m⁻³, yield strength 250 MPa, cost \$0.75 kg⁻¹) and aluminium alloy (density 2700 kg·m⁻³, yield strength 150 MPa, cost \$2.10 kg⁻¹). Determine which material satisfies the strength requirement and yields the lower material cost. State the selected material and its total cost (in dollars, rounded to two decimals).

Answer Options

Correct Answer A. Aluminium, total cost = 8.55 dollars
B. Steel, total cost = 7.80 dollars
C. Aluminium, total cost = 10.20 dollars
D. Steel, total cost = 9.30 dollars
Correct Answer
A
Correct Option:
Aluminium, total cost = 8.55 dollars

About This Question

This is City Guilds Model Questions Vol1 2024 Engineering Question 47. It is one of the objective questions from the 2024 City Guilds Model Questions Vol1 Engineering examination.

Difficulty level: Medium .

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