Answer & Solution
Answer: Option C
Solution:
The load-bearing capacity (LBC) of a timber prop depends on its dimensions and the type of wood used. For a 2.5 m long timber prop with a diameter of 15 cm (which is approximately 0.15 m), the expected range of LBC typically falls within 50 to 60 kN (kiloNewtons). This assumes a standard load capacity for timber props used in mining and construction to support roofs or walls.
Let's analyze each option:
Option A: "5 - 10 kN" - This range is too low for a timber prop of this size and diameter.
Option B: "15 - 20 kN" - This range is still too low for a timber prop of this size and diameter.
Option C: "50 - 60 kN" - This range is within the expected load-bearing capacity for a timber prop of this size and diameter.
Option D: "120 - 130 kN" - This range is too high for a timber prop of this size and diameter.
Therefore, the correct answer is
Option C: 50 - 60 kN.
