Orthographic Projection: Mechanical Drawing is one of 9 topics in the Grade 11 Engineering Graphics and Design CAPS syllabus, covered across 3 lessons on Study Vault. Below are real practice questions from this topic with full worked answers.
Sample practice questions
Easy
1. What shape is the head of a standard hexagonal bolt?
Six-sided (hexagonal)
Round
Square
Triangular
Answer: Six-sided (hexagonal) — A hexagonal bolt has a six-sided head, allowing a spanner or wrench to grip it firmly to apply tightening torque.
Easy
2. What is the purpose of a washer placed under a nut or bolt head?
To spread the clamping load over a wider surface area and provide a smooth bearing surface
To transmit rotational torque between a shaft and a hub
To prevent a nut from loosening under vibration
To maintain a fixed separation distance between two parts
Answer: To spread the clamping load over a wider surface area and provide a smooth bearing surface — A washer spreads the clamping load over a wider area, reducing the risk of damaging the fastened material, and provides a smooth surface for the nut or bolt head to rotate against.
Medium
3. Name the fastener fitted into matching machined slots on both a shaft and a mounted hub, used to transmit rotational torque between them.
Answer: a key — A key is fitted into matching keyways cut into both a shaft and a mounted component's hub, transmitting rotational torque between them.
