Maintenance & Lubrication is one of 8 topics in the Grade 10 Mechanical Technology 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 does viscosity describe about a lubricant?
Its resistance to flow
Its colour
Its exact chemical formula
Its cost per litre
Answer: Its resistance to flow — Viscosity describes a lubricant's resistance to flow: a high-viscosity oil is thick and flows slowly, while a low-viscosity oil is thin and flows easily.
Easy
2. What is the flash point of a lubricant?
The lowest temperature at which its vapours will briefly ignite when exposed to an open flame
The temperature at which it becomes completely solid
The temperature at which it boils completely away
The temperature at which its colour changes
Answer: The lowest temperature at which its vapours will briefly ignite when exposed to an open flame — Flash point is the lowest temperature at which a lubricant's vapours will briefly ignite when exposed to an open flame.
Medium
3. Name the lubricant property that describes the lowest temperature at which it will still flow or can still be poured.
Answer: pour point — Pour point is the lowest temperature at which a lubricant will still flow or can still be poured, important for equipment that must start reliably in cold conditions.
