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WorksheetsPCEI Chapters 1-3 Quiz
Total questions: 18
Worksheet time: 9mins
One design goal is incubators must keep the babies within which temperature range?
40 - 45 degree Celsius
36.5 - 37.5 degree Celsius
35 - 37 degree Celsius
38.5 - 39.5 degree Celsius
The heating materials do NOT need to be reusable.
True
False
The incubator must keep the baby's average temperature close to
35 degree Celsius
40 degree Celsius
37 degree Celsius
32 degree Celsius
One of the requirements of our incubator project is that the design must function using electricity.
true
false
Which of these are NOT one of the project design criteria?
Keep baby's temperature as close to 37 degrees Celsius as possible.
Minimize the time outside of the healthy temperature range.
Keep costs high.
All three of these are our project design criteria.
PCMs are substances that store and release large amounts of energy during the phase changes of melting and freezing.
True
False
Different PCMs need different amounts of ___________ to release their energy.
liquid
time
fuel
money
As a PCM loses energy, its molecules experience a _________________ in their freedom of movement.
increase
decrease
When a PCM gains energy, the molecules experience a ___________ in their freedom of movement.
increase
decrease
How will our incubator PCMs be reheated/reset?
Place them close to a heat source such as fire
Plug them into an electric heater.
Place them in boiling water.
They cannot be reheated or reset.
When a PCM is being heated (recharged), its temperature and kinetic energy increase during the temperature plateau phase.
True
False
When a PCM is being heated (recharged), the __________ energy is turned into _____________energy.
thermal, kinetic
kinetic, thermal
potential, kinetic
thermal, potential
When a PCM is being used to warm a baby incubator (cooling), the thermal energy is being converted to potential energy.
True
False
When a PCM is being used to warm a baby incubator (cooling), which phase change is occurring?
Melting
Freezing
Evaporation
Condensation
What is the primary function of a PCM in a baby incubator?
To monitor humidity
To supply oxygen
To regulate temperature
To provide insulation
Which phase change in a PCM is responsible for absorbing heat energy?
Melting
Sublimation
Freezing
Condensation
What happens to the temperature of a PCM during the phase change from solid to liquid?
It decreases
It remains constant
It fluctuates
It increases
