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Question 1
A deep-level gold mine shaft uses a single-drum cylindrical winder to lift rock from a depth of 1,800 m. The steel wire rope has a mass of 8.5 kg/m and the suspended skip empty mass is 6,000 kg. If the maximum payload of rock per trip is 10,000 kg, calculate the static safety factor of the rope at the headgear sheave when the loaded skip is at the bottom of the shaft, assuming a nominal rope breaking force of 2,400 kN. (Take g = 9.81 m/s²).
Correct Answer:
7.82
Question 2
According to South African Mine Health and Safety Act regulations for rock winding in a vertical shaft, what is the minimum permitted static safety factor (S) for a new winding rope at the headgear sheave for a suspended rope length of L = 2,000 m, using the standard formula S = 8.5 - 0.001 × L (subject to absolute minimum limits)?
Correct Answer:
6.50
Question 3
A Koepe (friction) winder has a drum angle of wrap θ = 190° (3.316 rad) and the friction coefficient between the steel rope and the polyurethane lining is μ = 0.25. Calculate the maximum static tension ratio (T1/T2) before rope slip occurs across the friction wheel.
Correct Answer:
2.29
Question 4
A double-drum winder has a drum width of 2.4 m and is positioned at a horizontal distance of 45 m from the headgear sheave wheel centerline. Calculate the maximum fleet angle when the rope is at the extreme outer flange of the drum.
Correct Answer:
1.53°
Question 5
A cylindrical drum winder has a total equivalent moment of inertia of 120,000 kg·m² at the drum shaft. The drum diameter is 4.5 m. If the winder accelerates the conveyances at a rate of 1.2 m/s², calculate the torque required at the drum shaft strictly to overcome rotational acceleration.
Correct Answer:
64.0 kN·m
Question 1
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About this Exam

Prepare with the GCC Mines & Works Plant Engineering Exam Practice Questions - GCC Mines & Works Engineer - Plant Engineering Examination (South Africa) Exam practice quiz. This question bank includes 100 questions covering rope, calculate, mine, underground, and current. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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GCC Mines & Works Plant Engineering Exam Practice Questions - GCC Mines & Works Engineer - Plant Engineering Examination (South Africa) Exam

This practice set contains 100 questions from the matching question bank and focuses on rope, calculate, mine, underground, and current. 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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