Thermodynamics and Heat Flashcards
7 cards from real Bennett Mechanical Test practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Thermodynamics and Heat flashcards as text
Insulated double-pane windows reduce heat loss mainly by:
Answer: Trapping a gas layer that slows conduction
The trapped gas or air between panes is a poor conductor and slows heat transfer.
When ice melts in a warm drink, the drink gets colder because the ice:
Answer: Absorbs heat from the drink to melt
Melting ice draws latent heat from the surrounding liquid, cooling it.
A heat engine converts which form of energy into mechanical work?
Answer: Thermal energy
A heat engine uses thermal energy from burning fuel to produce mechanical motion.
Why do firefighters wear reflective silver suits near intense flames?
Answer: To reflect radiant heat away from the body
Shiny silver surfaces reflect radiant heat instead of absorbing it.
Which scenario describes heat transfer by conduction?
Answer: A metal rod's far end warming when one end is in flame
Heat moving along the solid metal rod by direct particle contact is conduction.
A refrigerator keeps food cold by:
Answer: Removing heat from inside and releasing it outside
Refrigerators move heat out of the interior and expel it to the room, not adding cold.
As the temperature of a gas in a sealed rigid container increases, its pressure will:
Answer: Increase
Hotter gas particles move faster and strike the walls harder, raising pressure.