DCB30093 Quiz_1 : 2023/2024

Which statement best describes the HEAT?

• The form of energy that is transferred between two systems (or a system and its surroundings) by virtue of a temperature difference.

• The intensity of heat, measuring the average kinetic energy of molecules in a

  substance.

Identify FOUR (4) units of heat:

• Calorie

• Joule

• Celcius

• British Thermal Unit (BTU)

• Watt

Heat transfer occurs BETWEEN OBJECTS BY DIRECT CONTACT refers to:

• Conduction

• Convection

• Radiation

Heat transfer TAKES WITHIN THE FLUID refers to:

• Conduction

• Convection

• Radiation

Heat transfer occurs THROUGH ELECTROMAGNETIC WAVES without involving particles refers to:

• Conduction

• Convection

• Radiation

Which statement best describes the VENTILATION?

• Ventilation is the process of supplying air by natural or mechanical means to and from any space.

• Ventilation is the process of removing air by natural or mechanical means to and from any space.

• Ventilation is the process of supplying and removing air by natural or mechanical means to and from any space.

Which statement best describes the NATURAL VENTILATION?

• The process of supplying and removing air through an indoor space by natural means, meaning without the use of a fan or other mechanical system. It uses outdoor air flow caused by pressure differences.

• Ventilation systems circulate fresh air using ducts and fans rather than relying on airflow through small holes.

Which statement best describes the MECHANICAL VENTILATION?

• The process of supplying and removing air through an indoor space by natural means, meaning without the use of a fan or other mechanical system. It uses outdoor air flow caused by pressure differences.

• Ventilation systems circulate fresh air using ducts and fans rather than relying on airflow through small holes.

Which mechanical ventilation system illustrated in the following diagram?

• Extract ventilation system

• Supply ventilation system

Which mechanical ventilation system illustrated in the following diagram?

• Extract ventilation system

• Supply ventilation system