MEEN 461 Exam 1

MEEN 461 Exam 1
Which of the following is not a mode of heat transfer?
Answers:
Conduction
Convection
Induction
Radiation
Induction
Which of the following has the highest thermal conductivity?
Answers:
Air
Iron
Wood
Copper
Copper
What is the thermal conductivity of a vacuum in W/mK?
Answers:
100
0
1
10
Selected Answer:
0
What kind of heat transfer can take place in a vacuum?
Answers:
Radiation
Convection
Conduction
Selected Answer:
Radiation
A cylindrical wire generates heat uniformly, suspended vertically in air. Choose the
correct temperature profile across the wire assuming 1-D heat conduction (radial
direction), steady-state heat transfer, and constant k.
Parabola
Consider a medium in which the heat conduction equation is given in its simplest form.
Which of the following is not a correct assumption based on the simplified equation? 

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