NCIDQ IDPX & PRAC questions with correct answers 2023

NCIDQ IDPX & PRAC questions with correct answers 2023 life cycle cost analysis - correct answer determines cost of a building component; accounts for initial cost, financing, operation, maintenance, disposal, & residual value. HID and fluorescent - correct answer two light sources that require the use of a ballast low voltage lamps - correct answer can include incandescent, halogen, and LED lamps that are designed to operate at a reduced voltage; provide better beam control than a standard incandescent lamp; not specifically solid-state lighting (LEDs); CAN BE SWITCHED TOGETHER Illuminance - correct answer The rate at which light strikes a surface, or falls on a unit area; is measured in footcandles or in metric - lumens per square meter or lux, lx. Luminance - correct answer Luminous flux per unit of projected area and unit solid angle leaving a surface, either reflected or transmitted. Measured by candela per square meter. Sometimes referred to as brightness candela per square meter - correct answer units used for the measurement and description of the brightness (foot lamberts) of a direct glare source are Lumen - correct answer the amount of light output produced by a lamp or light source; lamp manufacturers rate their lamps in this unit and publish catalogs with this information Candlepower - correct answer The luminous intensity of a light source, expressed in candelas. Footcandle - correct answer A unit of illumination equal to 1 lumen per square foot.