Chapter 16 Questions

Question 1

Which of the following spacecraft coatings is known to have a low absorptivity and a high emissivity?

a. Vacuum-deposited Gold
b. Black Paint
c. White Paint

Answer 1

c. White Paint

Question 2

True/False: When designing a thermal control system for a LEO satellite, we need to consider heat from direct sunlight, heat reflected off of the Earth and Earth IR radiated energy as well as our satellite’s internal heat.

Answer 2

True

Question 3

Based on a lumped-node, iso-thermal analysis of a 1 m diameter sphere in full sun, it would be ________ if coated with gold than if it were coated with black paint.

a. warmer
b. cooler
c. none of these
d. the same temperature

Answer 3

a. warmer

Question 4

Which of the following are goals/objectives of the thermal control subsystem?

a. all of these
b. passively or actively move heat around within the spacecraft
c. control the amount of heat absorbed by the spacecraft
d. actively heat or cool components as necessary

Answer 4

a. all of these