Test 10 Flashcards
Arrays are most often installed on roofs.
True
Active cooling means are practical for cooling flat-plate modules.
False
Modules mounted directly on the roof surface increase the heat transfer into a building.
True
Since rack mounts use an open, truss like structure, air can circulate freely around the modules and keep them cool.
True
Ground-mounted arrays generally offer less flexibility than building-mounted arrays in the location and orientation of arrays.
False
A passive tracking mount is an array mounting system that uses nonelectrical means to automatically direct an array toward the sun.
True
Single-axis tracking mounts follow the sun exactly as it moves across the sky.
False
The allowable withdrawal load is the force required to remove a screw from a material by tensile force only.
True
Ground foundations for rack mounts typically include concrete footers.
True
Spanning is used with lag screws.
False
Installed nominal operating cell temperature (INOCT) for ____-mounted modules is the highest among building mounting systems.
direct
A(n) ____ mounting system is an array mounting system that permanently secures modules in a non movable position at a specific tilt angle.
fixed-tilt
A ____ mount is a type of fixed- or adjustable-tilt array mounting system with a triangular-shaped structure to increase the tilt angle of the array.
rack
A(n) ____ photovoltaic array is a fixed array that replaces conventional building materials with specially designed modules that also perform an architectural function.
building-integrated
A ____ mount is a type of array mounting system where modules are installed at an elevation on a pedestal.
pole
A(n) ____ mount is an array mounting system that automatically orients the array to the position of the sun.
sun-tracking
A ____ load is a static structural load due to the weight of permanent building members, supported structure, and attachments.
dead
A ____ load is a dynamic structural load due to periodic motion.
vibration
____ is the addition of lumber under a roof surface and between trusses or rafters as supplemental structural support.
Blocking
A(n) ___-bolt is a fastener that hooks around a secure support structure and has a threaded end that is used with a nut to secure items.
J
Keeping modules and arrays clear of obstructions is the easiest way to promote natural ____.
cooling
Arrays mounted directly on buildings can increase ____ transfer into conditioned spaces
heat
It is faster and easier to assemble panels or subsystems on the ____ before installing them on the roof.
ground
A(n) ____ mount is a type of fixed-tilt array mounting system where modules are supported by a structure parallel to and slightly above the roof surface.
standoff
____-mounted PV systems may also contain lights, weather stations, communications equipment, security cameras, or other devices.
Pole
A(n) ____ tracking mount is an array mounting system that uses electric motors and gear drives.
active
____ corrosion is an electrochemical process that causes electrical current to flow between two dissimilar metals, eventually corroding one of the materials.
Galvanic
A(n) ____ load is a dynamic structural load due to the weight of temporary items and people using or occupying the structure.
live
____ is an attachment method that relies on the weight of the array, support structure, and ballasting material to hold the array in position.
Self-ballasting
The best weather-sealing method uses ____ and rubber boots to seal around roof penetrations.
flashings
