Hydraulic & Pneumatic Systems, and Pulleys is one of 9 topics in the Grade 9 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. A system that uses compressed air to transfer force between two linked syringes is called a:
Pneumatic system
Hydraulic system
Mechanical system
Electronic system
Answer: Pneumatic system — A pneumatic system uses a compressible gas, such as compressed air, to transfer force between two linked syringes or cylinders.
Easy
2. Which of these best describes the difference between gases and liquids used in these systems?
Gases are compressible, liquids are incompressible
Gases are incompressible, liquids are compressible
Both gases and liquids are equally compressible
Neither gases nor liquids can be compressed at all
Answer: Gases are compressible, liquids are incompressible — Gases (like air) are compressible -- they can be squeezed into a smaller volume -- while liquids (like water or oil) are incompressible.
Medium
3. Name the principle stating that pressure exerted on one part of an enclosed hydraulic system is transferred equally, without loss, to all other parts.
Answer: Pascal's principle — Pascal's principle states that pressure exerted on one part of a hydraulic system is transferred equally, without any loss, in all directions to other parts of the system.
