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

Reflecting all sunlight

Answer

Increasing convection inside the room

Answer

Conducting heat outward faster

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

Releases cold into the liquid

Answer

Adds extra water volume

Answer

Reflects heat away

Question 3

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

Accepted Answer

Thermal energy

Answer

Electrical energy

Answer

Chemical bonds directly

Answer

Sound energy

Question 4

Why do firefighters wear reflective silver suits near intense flames?

Accepted Answer

To reflect radiant heat away from the body

Answer

To absorb more heat safely

Answer

To conduct heat to the ground

Answer

To increase convection cooling

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

Smoke rising from a campfire

Answer

Sunlight warming a parked car

Answer

Boiling water circulating in a pot

Question 6

A refrigerator keeps food cold by:

Accepted Answer

Removing heat from inside and releasing it outside

Answer

Creating cold and pumping it in

Answer

Blocking all energy transfer

Answer

Freezing the surrounding air

Question 7

As the temperature of a gas in a sealed rigid container increases, its pressure will:

Accepted Answer

Increase

Answer

Decrease

Answer

Stay constant

Answer

Drop to zero