Bennett Mechanical Test Thermodynamics and Heat 5

Question 1

Insulated double-pane windows reduce heat loss mainly by:

Accepted Answer

Trapping a gas layer that slows conduction

Answer

The trapped gas or air between panes is a poor conductor and slows heat transfer.

Question 2

When ice melts in a warm drink, the drink gets colder because the ice:

Accepted Answer

Absorbs heat from the drink to melt

Answer

Melting ice draws latent heat from the surrounding liquid, cooling it.

Question 3

A heat engine converts which form of energy into mechanical work?

Accepted Answer

Thermal energy

Answer

A heat engine uses thermal energy from burning fuel to produce mechanical motion.

Question 4

Why do firefighters wear reflective silver suits near intense flames?

Accepted Answer

To reflect radiant heat away from the body

Answer

Shiny silver surfaces reflect radiant heat instead of absorbing it.

Question 5

Which scenario describes heat transfer by conduction?

Accepted Answer

A metal rod's far end warming when one end is in flame

Answer

Heat moving along the solid metal rod by direct particle contact is conduction.

Bennett Mechanical Test Practice Test