A: Reduced friction
B: Heat insulation
C: Sealing
D: Heat dissipation
举一反三
- 4-2。which is the best material for heat insulation?( ) A: water B: cotton C: vacuum
- Which one is not a state function? A: Enthalpy B: Internal energy C: Entropy D: Work/Heat
- A SECONDARY function of a waste heat boiler is to ().
- Which of the following is not the way of heat loss? () A: Shivering B: Radiation C: Conduction D: Convection E: Evaporation
- Air preheater is a heat exchange device which uses the heat of flue gas to heat the air needed for combustion. () A: Right B: Wrong
内容
- 0
The sum of the sensible heat and the latent heat of any substance is known as ________. A: total heat B: residual heat C: specific heat D: superheat
- 1
Quart is to volume as () A: day is to night B: mile is to distance C: decade is to century D: friction is to heat E: part is to whole
- 2
Which of the following phenomena belongs to an adiabatic process ?() A: The temperature of the system remains unchanged B: The system does not absorb heat from the environment C: No heat exchange between the system and the environment D: The internal energy of the system remains unchanged
- 3
Which of the following solar terms belongs to spring? A: Major Heat B: Minor Snow C: Frost Descent D: Awakening of Insects
- 4
How will the heat loss change by thickening the insulation layer outside the pipe? A: Increase B: No change C: Decrease D: Can not be determined