FLUID DYNAMICS CERTIFICATION
EVALUATION 2026 EXAM Q&A STUDY
SHEET
◉What is cohesion in fluids? Answer: Cohesion is the force of
attraction between particles of the same substance, affecting how
viscous a fluid is.
◉What is surface tension? Answer: Surface tension is the strong
attraction among particles at a liquid's surface, creating a 'skin' that
some insects can walk on.
◉What is adhesion in fluids? Answer: Adhesion is the attraction
between particles of a fluid and particles of another substance,
affecting how fluids behave in containers.
◉What happens to flow rate when the size of the pipe increases?
Answer: Larger openings allow for faster flow rates.
◉How does a wetting agent affect cohesion? Answer: A wetting
agent reduces cohesion, allowing water to spread more easily.
,◉What is the relationship between flow rate and viscosity? Answer:
Higher viscosity results in lower flow rates, while lower viscosity
allows for higher flow rates.
◉How does adhesion affect flow rate in pipes? Answer: Adhesion
slows down the flow of fluid near the edges of pipes, causing fluids
to travel faster near the center.
◉What is a meniscus? Answer: A meniscus is the curved surface of a
liquid in a container, caused by adhesion between the liquid and the
container.
◉What is an example of a fluid with high viscosity? Answer: Maple
syrup is an example of a fluid with high viscosity.
◉What is an example of a fluid with low viscosity? Answer: Soy
sauce is an example of a fluid with low viscosity.
◉How can you measure the flow rate of a dripping tap? Answer:
Collect the water over a set time period and calculate the volume to
determine the flow rate.
◉What is the effect of temperature on fluid viscosity? Answer:
Generally, increasing temperature decreases viscosity, allowing
fluids to flow more easily.
, ◉What is the significance of surface tension in nature? Answer:
Surface tension allows insects to walk on water and affects how
liquids behave in various environments.
◉What is the role of cohesion in high-viscosity fluids? Answer: High
cohesion in thick fluids causes them to resist flow and stick together.
◉How does the shape of a container affect the volume of liquid?
Answer: The volume remains constant regardless of the container
shape, as long as the liquid is not lost.
◉What happens to gases when placed in a container? Answer:
Gases will completely fill any empty container they are placed in.
◉What is the impact of fluid viscosity on fire-fighting efforts?
Answer: Reducing viscosity with wetting agents helps water spread
and cover burning materials more effectively.
◉How does the flow rate of water compare to that of honey?
Answer: Water flows much faster than honey due to its lower
viscosity.
◉What is the effect of fluid thickness on flow rate? Answer: Thicker
fluids have slower flow rates compared to thinner fluids.
EVALUATION 2026 EXAM Q&A STUDY
SHEET
◉What is cohesion in fluids? Answer: Cohesion is the force of
attraction between particles of the same substance, affecting how
viscous a fluid is.
◉What is surface tension? Answer: Surface tension is the strong
attraction among particles at a liquid's surface, creating a 'skin' that
some insects can walk on.
◉What is adhesion in fluids? Answer: Adhesion is the attraction
between particles of a fluid and particles of another substance,
affecting how fluids behave in containers.
◉What happens to flow rate when the size of the pipe increases?
Answer: Larger openings allow for faster flow rates.
◉How does a wetting agent affect cohesion? Answer: A wetting
agent reduces cohesion, allowing water to spread more easily.
,◉What is the relationship between flow rate and viscosity? Answer:
Higher viscosity results in lower flow rates, while lower viscosity
allows for higher flow rates.
◉How does adhesion affect flow rate in pipes? Answer: Adhesion
slows down the flow of fluid near the edges of pipes, causing fluids
to travel faster near the center.
◉What is a meniscus? Answer: A meniscus is the curved surface of a
liquid in a container, caused by adhesion between the liquid and the
container.
◉What is an example of a fluid with high viscosity? Answer: Maple
syrup is an example of a fluid with high viscosity.
◉What is an example of a fluid with low viscosity? Answer: Soy
sauce is an example of a fluid with low viscosity.
◉How can you measure the flow rate of a dripping tap? Answer:
Collect the water over a set time period and calculate the volume to
determine the flow rate.
◉What is the effect of temperature on fluid viscosity? Answer:
Generally, increasing temperature decreases viscosity, allowing
fluids to flow more easily.
, ◉What is the significance of surface tension in nature? Answer:
Surface tension allows insects to walk on water and affects how
liquids behave in various environments.
◉What is the role of cohesion in high-viscosity fluids? Answer: High
cohesion in thick fluids causes them to resist flow and stick together.
◉How does the shape of a container affect the volume of liquid?
Answer: The volume remains constant regardless of the container
shape, as long as the liquid is not lost.
◉What happens to gases when placed in a container? Answer:
Gases will completely fill any empty container they are placed in.
◉What is the impact of fluid viscosity on fire-fighting efforts?
Answer: Reducing viscosity with wetting agents helps water spread
and cover burning materials more effectively.
◉How does the flow rate of water compare to that of honey?
Answer: Water flows much faster than honey due to its lower
viscosity.
◉What is the effect of fluid thickness on flow rate? Answer: Thicker
fluids have slower flow rates compared to thinner fluids.
