Klimagerechtes Bauen II

 

1. Which statement is correct regarding a mixed-flow ventilation system?

•  

  1. Supply air needs to enter the room with high speed, so it causes induction with the existing air.

•  

  1. A heat recovery is mandatory to reduce heating demand.

•  

  1. Due to the principle “warm air goes up”, it isn´t possible to heat the room when theoutlets are placed in the ceiling.

•  

  1. A trickle vent has to be in the window frame.

 

What is the wavelength of visible light?

•  380 – 870 K

• 490 – 780 cd

• 490 - 870 lx

• 380 - 780 nm

 

How high is the percentage of heat recovery in a state of the art ventilation system?

• 90 %

• 80 %

• 60 %

• 30 %

 

1. At which temperature should the supply air enter the room, when using a displacementventilation system?

•  Min. 2 K higher than the room temperature.

•  Min. 1 K higher than the room temperature.

•  Min. 3 K higher than the room temperature.

•  Min. 4 K higher than the room temperature.

 

The minimum hygienic air change rate in living spaces is 0,5 h-1. This means that:

•  

  1. 0,5 m³ of fresh air per hour must be supplied in the room air.

•  

  1. The total room volume is replaced with fresh air every half hour.

•  

  1. Half of the room volume is exchanged with fresh air once per hour.

• 1. Fresh air with a volume of 0,5% of the room volume is supplied to the 

 

When using a mixed-flow ventilation system, which outlet system is able to reach high distances?

• Jet noozle

• 1. Popper valve

• 1. Swirl diffuser

• 1. Slot diffuser

 

Which of the following gases has the highest concentration in the air?

• Carbon dioxide

• Nitrogen

• Hydrogen

• Oxygen

Above which value of the brightest surface do you get a risk of glare on your working desk, when the darkest surface on the desk provides a luminance of 200 cd/m²?

• 600 cd/m²

• 800 cd/m²

• 400 cd/m²

• 200 cd/m²

11.Which is the tolerance range of the reverberation time for a music room, according to DIN 18141?

What information do you get from the SHGC value?

• How much light is transmitted through the opaque components like walls.

• How much energy is transmitted through the opaque components like walls.

• How much energy is transmitted through transparent components like windows.

• How much light is transmitted through transparent components like windows.