Poll Everywhere (Chapters 6 & 10)

The SI unit of luminous intensity is the:

candela

One daylighting design guideline suggests that there should be sufficient workplane illuminance from a window up to a distance of ________ times the head height of the window (height of the window above the desk plane).

2.5

In general, with a sidelighting system any interior area more than ________ feet (m) from a window will need to be electrically lit.

30 (9.1)

The recommended daylight factor for difficult prolonged tasks, such as drafting, is:

4.0 - 8.0 %

Which daylighting analysis method(s) work(s) only for a rectilinear space?

CIE method and IESNA lumen method

The standard sky design condition established by the Commission Internationale d-Eclairage (CIE) for daylighting calculation is:

a completely overcast sky

The brightest area of luminance in a cloudy sky is:

at the zenith

Daylight within a space is generally most evenly distributed when:

bilateral lighting from opposite walls is used

The relationship between brightness and luminance can best be described in the following way:

both are terms used to describe light coming off of an object, however brightness is subjective and luminance is measurable

Illuminance is measured more frequently than luminance because:

design recommendations for lighting levels are typically given in terms of illuminance

Illuminance levels and illuminance categories are used to:

establish quantitative lighting system design criteria

The daylighting analysis method that produces a family of daylight factor contours within a room rather than individual daylight factors at specific points is:

graphic daylighting design method (GDDM)

In general, daylight will penetrate further into a space and have a more uniform quality if windows are placed:

high on a wall

Daylight factor (DF) is defined as the ratio of ________.

indoor illuminance to available outdoor illuminance

All of the following strategies can reduce the potential for glare, except:

locate windows to allow direct views outside

The relationship between illuminance and luminance for an opaque surface is best described as:

luminance is illuminance as modified by reflectance

Which is NOT a key goal in daylighting design?

maximize the ratio of glazing to floor area

The reflection that occurs with a smooth surface such as polished glass or a mirror is called:

specular reflection

Illuminance is best defined as:

the density of luminous energy, expressed as lumens per unit area

The externally reflected component (ERC) of the total daylight factor (DF) represents:

the light reflected from exterior obstructions excluding the ground-reflected light

A "bearing angle" of 90 degrees indicates that:

the sun plane is parallel to the vertical surface in question

Photometric readings are usually taken at the height of a "working plane" because:

this approximates the height of typical visual tasks

When a light source produces energy over the entire visible spectrum in approximately equal quantities, the light appears as:

white