Scientific Facts About Heating And Cooling

2.

If you turn off the heat in the winter your pipe's won't freeze.

False
True

Correct Answer

A. False

Explanation

Turning off the heat in the winter does not prevent pipes from freezing. In fact, it is important to keep the heat on to prevent pipes from freezing and potentially bursting. When the temperature drops below freezing, the heat helps to keep the water in the pipes warm and prevent them from freezing. Therefore, the statement that turning off the heat prevents pipes from freezing is false.

Rate this question:

1

3.

What should you do when you feel cold in your house.

Wear less clothing
Turn on the heat
Wear more clothing
Turn on the air conditioning
Open a window

Correct Answer

A. Wear more clothing

Explanation

When feeling cold in your house, the best course of action is to wear more clothing. This helps to insulate your body and retain heat, providing a warmer sensation. By adding layers, you can trap the heat close to your body and prevent it from escaping. This is a simple and effective way to combat the cold without having to rely solely on heating systems or air conditioning, which can be costly and energy-consuming.

Rate this question:

1

4.

A heat pump heats and _______ the air.

Humidifies
Cools
Freshens
None

Correct Answer

A. Cools

Explanation

A heat pump works by transferring heat from one place to another. In the case of cooling, the heat pump removes heat from the air inside a space and transfers it outside, resulting in the cooling of the air. Therefore, the correct answer is "cools."

Rate this question:

1

5.

Modern heating and cooling systems use what type of thermostat to control air temperature?

Solid-state electronic thermostat
Two exposed contacts
Coiled bimetallic strips
None

Correct Answer

A. Solid-state electronic thermostat

Explanation

Modern heating and cooling systems use solid-state electronic thermostats to control air temperature. These thermostats are made with solid-state components, such as semiconductors, which allow for precise temperature control and efficient operation. Unlike two exposed contacts or coiled bimetallic strips, solid-state electronic thermostats do not rely on physical contact or mechanical movement to sense and regulate temperature. Instead, they use electronic sensors and circuits to accurately measure and adjust the temperature, providing more reliable and advanced control over the heating and cooling systems.

Rate this question:

1

6.

What type of slab construction is needed for radiant heating systems?

Concrete slab
Wood
Steel stumps
None

Correct Answer

A. Concrete slab

Explanation

A concrete slab is needed for radiant heating systems because it has the ability to retain and distribute heat effectively. Concrete has a high thermal mass, meaning it can absorb and store heat, and then slowly release it over time. This makes it an ideal material for radiant heating systems, as it allows for efficient and consistent heating throughout a space. Wood and steel stumps do not have the same thermal properties as concrete, making them less suitable for this type of heating system.

Rate this question:

1

7.

What control is used to regulate heating and cooling systems?

Thermostat
Rheostat
Timer device
None

Correct Answer

A. Thermostat

Explanation

A thermostat is a control device that is used to regulate heating and cooling systems. It is responsible for maintaining a desired temperature by turning the system on or off as needed. This control is commonly found in homes and buildings to ensure comfort and energy efficiency. A rheostat is a variable resistor used for controlling the flow of electric current, not specifically designed for heating and cooling systems. A timer device may be used for scheduling the operation of certain systems, but it does not directly regulate the temperature. Therefore, the correct answer is thermostat.

Rate this question:

8.

Gain or loss of heat affects the state of

Matter
Conduction
Convection
Radiation

Correct Answer

A. Matter

Explanation

The gain or loss of heat affects the state of matter because heat energy can cause substances to change from one state to another. For example, when heat is added to a solid, it can melt and become a liquid. Similarly, when heat is removed from a liquid, it can freeze and become a solid. The state of matter can also be affected by the amount of heat present. For instance, when a gas is heated, it can expand and become less dense, while cooling a gas can cause it to contract and become more dense. Therefore, the gain or loss of heat directly impacts the state of matter.

Rate this question:

9.

Water expansion occurs when

Freezing
Heating
Both a and b
Boiling

Correct Answer

A. Heating

Explanation

When water is heated, its molecules gain energy and move faster, causing them to spread out and occupy more space. This expansion is due to the increased kinetic energy of the water molecules. As a result, the volume of water increases when it is heated, leading to its expansion.

Rate this question:

1

10.

Heat which is in the form of infra-red waves, emitted in all directions at speed of light is

Conduction
Convection
Radiation
Expansion

Correct Answer

A. Radiation

Explanation

Heat in the form of infra-red waves is emitted in all directions at the speed of light, which is known as radiation. This process does not require any medium to transfer heat and can occur through vacuum as well. Conduction refers to the transfer of heat through direct contact, convection refers to the transfer of heat through the movement of fluids, and expansion refers to the increase in volume of a substance due to an increase in temperature.

Rate this question:

1

Scientific Facts About Heating And Cooling

To save more energy you should turn the heat high in the winter.

Quiz Preview

If you turn off the heat in the winter your pipe's won't freeze.

What should you do when you feel cold in your house.

A heat pump heats and _______ the air.

Modern heating and cooling systems use what type of thermostat to control air temperature?

What type of slab construction is needed for radiant heating systems?

What control is used to regulate heating and cooling systems?

Gain or loss of heat affects the state of

Water expansion occurs when

Heat which is in the form of infra-red waves, emitted in all directions at speed of light is