This is a moving stairs.

• Ventilator

• Escalator

• Elevator

• Conveyor

What does HVAC stands for?

• Hot Ventilation Aircon

• Humidifier Ventilation Airconditioning

• Heat Ventilation Airconditioning

• Heating Ventilation Air Conditioning

Its a lift or car that moves in vertical shaft to carry passengers.

• Escalator

• Elevator

• Conveyor

• Car

Its a mechanical apparatus that moves objects from one place to another

• Escalator

• Elevator

• Conveyor

• Ventilator

What is the minimum access door for a public area?

• 1

• 2

• 3

• 4