Question $11$ pts

For $1-$D heat transfer, which conditions are required for a plane wall temperature gradient to be linear?

Group of answer choices

transient conditions

constant thermal conductivity

no heat generation

fixed temperature at one surface

Question $21$ pts

The energy content of a wall does not change during steady$-$state heat transfer, but does change during transient heat transfer.

Group of answer choices

True

False

Question $31$ pts

The convection heat transfer coefficient, h$,$ is the inverse of the convection resistance per unit area.

Group of answer choices

True

False

Question $41$ pts

If one side of a plane wall experiences a higher convection coefficient $($larger h$),$ there will be a larger temperature difference between that surface and the adjacent fluid $($Ts $-$ T

$)$ as compared to the other side $($both sides have the same area$).$

Group of answer choices

True

False

Question $51$ pts

Thermal contact resistance exists because air gaps have low conductivity compared to that of most solid materials.

Group of answer choices

True

False

Question $61$ pts

Which methods will reduce thermal contact resistance for contact surfaces?

Group of answer choices

applying a thermal paste

increasing surface smoothness

inserting a soft conductive foil between surfaces

increasing surface contact pressure

Question $71$ pts

Thermal resistance networks can be confidently applied to approximate multidmensional heat transfer for heat flow in multiple directions.

Group of answer choices

True

False

Question $81$ pts

Parallel resistances are used to represent sequential heat transfer.

Group of answer choices

True

False

Question $91$ pts

The thermal resistance network concept cannot be used for a cylinder or sphere under steady$-$state conditions with no heat generation.

Group of answer choices

True

False

Question $101$ pts

A short cylinder perfectly insulated at each end's surface will have $2-$D heat transfer to the surrounding fluid.

Group of answer choices

True

False