Ceist Eile

Ceist Eile is in development. Features, questions and prices may change while we refine it.

Junior Cycle · Junior Cycle Engineering

Junior Cycle Engineering: Bearings & lubrication

How often Bearings & lubrication comes up on the Engineering papers, every year it was asked, and questions to try.

CL Asked on 4 of the last 5 Common Level papers, most recently in 2026. most years

Bearings & lubrication, Common Level(7 marks)

Quick ones on Bearings & lubrication.

(a)What is the main job of a bearing on a rotating shaft?
  1. Locks the shaft so it cannot turn
  2. Supports the shaft and reduces friction
  3. Increases the speed of the shaft
(b)In a ball bearing, what reduces the friction?
  1. A magnet holding the shaft in the air
  2. A layer of glue between the two rings
  3. Steel balls rolling between two rings
(c)What materials are plain bearings (bushes) often made from?
  1. Bronze or nylon
  2. Rubber or soft foam
  3. Glass or ceramic tile
Show the answers

(a) Supports the shaft and reduces friction

(b) Steel balls rolling between two rings

(c) Bronze or nylon

Your turn: Common Level questions on Bearings & lubrication.

Common Level

Asked on 4 of the last 5 Common Level papers, most recently in 2026. most years

Every paper, year by year

YearWhere it came up
2026Q4c
2025Q3f, Q4d
2024Q3b
2023Not asked
2022Q2e, Q4a

Links open the State Examinations Commission’s paper for that year.

More Bearings & lubrication questions

Bearings & lubrication, 3 marks

What are the benefits of oiling a bicycle chain?

  1. More friction so the chain grips better
  2. More weight so it runs more smoothly
  3. Less friction, less wear and less rust
Show the answer

Less friction, less wear and less rust

Oil forms a thin film between moving parts so metal does not rub on metal. That cuts friction, heat and wear and keeps water off, so the chain lasts longer and runs quietly.

Bearings & lubrication, 3 marks

Which lubricant stays in place best in a wheel bearing that is rarely serviced?

  1. Petrol
  2. Grease
  3. Water
Show the answer

Grease

Grease is oil thickened into a paste, so it stays put and does not drip or run off. It suits slow, heavily loaded or hard-to-reach parts like wheel bearings.

Other Engineering topics

All of Junior Cycle Engineering