City Guilds Model Questions Vol1 2025 Engineering Question 24

Practice objective / multiple choice question 24 from the 2025 City Guilds Model Questions Vol1 Engineering examination.

City Guilds Model Questions Vol1 2025 Engineering Objective / Multiple Choice Medium Difficulty

Question 24 CITY_GUILDS_MODEL_QUESTIONS_VOL1 • 2025 • ENGINEERING • objective

The Brinell hardness number (BHN) of a steel after quenching is empirically related to its carbon content \(C\) (in weight %) by the equation \(\text{BHN}=500-2000C+3000C^{2}\). The component must attain a BHN of at least \(250\). Determine the range of carbon content \(C\) (to three decimal places) that satisfies this requirement.

Answer Options

Correct Answer A. C ≤ 0.167% or C ≥ 0.500%

B. C ≤ 0.150% or C ≥ 0.480%

C. C ≤ 0.160% or C ≥ 0.520%

D. C ≤ 0.180% or C ≥ 0.460%

Correct Answer

Correct Option:

C ≤ 0.167% or C ≥ 0.500%

About This Question

This is City Guilds Model Questions Vol1 2025 Engineering Question 24. It is one of the objective questions from the 2025 City Guilds Model Questions Vol1 Engineering examination.

Difficulty level: Medium .

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