Waec Model Questions Vol1 2019 Geography Question 23

Practice objective / multiple choice question 23 from the 2019 Waec Model Questions Vol1 Geography examination.

Waec Model Questions Vol1 2019 Geography Objective / Multiple Choice Medium Difficulty
Question 23 WAEC_MODEL_QUESTIONS_VOL1 • 2019 • GEOGRAPHY • objective

A rock sample consists of 55 % quartz, 30 % feldspar and 15 % mica. It is described as having interlocking crystals that solidified from cooling magma. (a) Identify the rock type. (b) The compressive strength (in MPa) of granite can be approximated by S = 150 + 0.5 × (% quartz). Determine whether this rock meets a construction requirement of at least 180 MPa.

Answer Options

Correct Answer A. Granite; not suitable for construction (strength 177.5 MPa < 180 MPa)
B. Granite; suitable for construction (strength 182.5 MPa ≥ 180 MPa)
C. Granite; not suitable for construction (strength 165 MPa < 180 MPa)
D. Diorite; not suitable for construction (strength 177.5 MPa < 180 MPa)
Correct Answer
A
Correct Option:
Granite; not suitable for construction (strength 177.5 MPa < 180 MPa)

About This Question

This is Waec Model Questions Vol1 2019 Geography Question 23. It is one of the objective questions from the 2019 Waec Model Questions Vol1 Geography examination.

Difficulty level: Medium .

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