4NO51 CDC's Set A Volume 1 and 2
Questions and Answers Already Passed
How does "centrifugal force" contribute to the operation of a pump?
✔✔It helps move fluids through the system by creating pressure differences.
Why is "pressure testing" conducted on systems?
✔✔To ensure the integrity of the system and detect leaks or weaknesses.
What does "dynamic pressure" measure in a fluid system?
✔✔The pressure due to the velocity of the fluid in motion.
What is the purpose of a "manifold" in a mechanical system?
✔✔To distribute or collect fluid from multiple sources or destinations within the system.
Why are "filters" necessary in hydraulic systems?
✔✔To prevent contamination by trapping particles and debris before they reach sensitive
components.
1
,How does "electrolysis" affect materials?
✔✔It causes chemical reactions that can deteriorate materials, especially metals, when exposed
to electrical currents.
What is the primary function of a "valve" in mechanical systems?
✔✔To control the flow of fluids or gases within the system.
Why is it important to monitor pressure in pneumatic systems?
✔✔To ensure proper system operation and prevent damage from over-pressurization.
What does the term "flow rate" refer to in a fluid system?
✔✔The volume of fluid passing through a given point in the system over a specific time.
What is the purpose of a "check valve" in fluid systems?
✔✔To allow fluid to flow in one direction only and prevent backflow.
What is meant by "thermal conductivity" in materials?
2
,✔✔The ability of a material to conduct heat.
Why is lubrication important in mechanical systems?
✔✔To reduce friction between moving parts, preventing wear and overheating.
What does "vibration damping" achieve in mechanical systems?
✔✔It reduces unwanted vibrations that could damage components or cause operational
inefficiencies.
How do "pressure relief valves" protect systems?
✔✔They open to release excess pressure and prevent system damage or failure.
What is the role of "filters" in pneumatic and hydraulic systems?
✔✔To remove contaminants from the fluid to maintain system efficiency and protect
components.
What is a "compressor" used for in mechanical systems?
✔✔To increase the pressure of gases by reducing their volume.
3
, Why are "gauges" used in mechanical systems?
✔✔To measure and monitor parameters like pressure, temperature, or flow in real-time.
What is the primary purpose of a "regulator" in gas systems?
✔✔To control and maintain a consistent pressure within the system.
What does "torque" measure in mechanical systems?
✔✔The rotational force applied to an object or component.
Why are "seals" important in mechanical equipment?
✔✔They prevent leaks by ensuring a tight connection between parts.
How does a "thermocouple" work to measure temperature?
✔✔By generating a voltage that is proportional to the temperature difference between two
different metals.
What is the function of a "muffler" in gas systems?
4
Questions and Answers Already Passed
How does "centrifugal force" contribute to the operation of a pump?
✔✔It helps move fluids through the system by creating pressure differences.
Why is "pressure testing" conducted on systems?
✔✔To ensure the integrity of the system and detect leaks or weaknesses.
What does "dynamic pressure" measure in a fluid system?
✔✔The pressure due to the velocity of the fluid in motion.
What is the purpose of a "manifold" in a mechanical system?
✔✔To distribute or collect fluid from multiple sources or destinations within the system.
Why are "filters" necessary in hydraulic systems?
✔✔To prevent contamination by trapping particles and debris before they reach sensitive
components.
1
,How does "electrolysis" affect materials?
✔✔It causes chemical reactions that can deteriorate materials, especially metals, when exposed
to electrical currents.
What is the primary function of a "valve" in mechanical systems?
✔✔To control the flow of fluids or gases within the system.
Why is it important to monitor pressure in pneumatic systems?
✔✔To ensure proper system operation and prevent damage from over-pressurization.
What does the term "flow rate" refer to in a fluid system?
✔✔The volume of fluid passing through a given point in the system over a specific time.
What is the purpose of a "check valve" in fluid systems?
✔✔To allow fluid to flow in one direction only and prevent backflow.
What is meant by "thermal conductivity" in materials?
2
,✔✔The ability of a material to conduct heat.
Why is lubrication important in mechanical systems?
✔✔To reduce friction between moving parts, preventing wear and overheating.
What does "vibration damping" achieve in mechanical systems?
✔✔It reduces unwanted vibrations that could damage components or cause operational
inefficiencies.
How do "pressure relief valves" protect systems?
✔✔They open to release excess pressure and prevent system damage or failure.
What is the role of "filters" in pneumatic and hydraulic systems?
✔✔To remove contaminants from the fluid to maintain system efficiency and protect
components.
What is a "compressor" used for in mechanical systems?
✔✔To increase the pressure of gases by reducing their volume.
3
, Why are "gauges" used in mechanical systems?
✔✔To measure and monitor parameters like pressure, temperature, or flow in real-time.
What is the primary purpose of a "regulator" in gas systems?
✔✔To control and maintain a consistent pressure within the system.
What does "torque" measure in mechanical systems?
✔✔The rotational force applied to an object or component.
Why are "seals" important in mechanical equipment?
✔✔They prevent leaks by ensuring a tight connection between parts.
How does a "thermocouple" work to measure temperature?
✔✔By generating a voltage that is proportional to the temperature difference between two
different metals.
What is the function of a "muffler" in gas systems?
4
