Ventilation is a process of moving air from one space to another entirely separate space and is a matter of ______:

The induction force that moves the air in a room or building in case of natural ventilation is due to _______:

The summer wind velocities are higher than those in the winter:

If the airstream meets an obstruction of any kind, such as house or ventilator then:

The volume of air required for proper ventilation is determined by:

It is recommended that an air exchange rate of _______ per person be allowed for extremely crowded spaces:

A closed flue (stack) or chimney will induce a draft or draw air:

Air leakage due to Temperature difference or thermal effect is usually referred to as stack or chimney effect:

The area of the air intakes should at all times be ______ that of the combined airshaft area of all ventilators

The factors that are to be considered in making a selection of proper ventilator for a specific problem: (Multiple Answer Question)