In each blank, try to type in the
word that is missing. If you've
typed in the correct word, the
blank will turn green.
If your not sure what answer should be entered, press the space bar and the next missing letter will be displayed. When you are all done, you should look back over all your answers and review the ones in red. These ones in red are the ones which you needed help on. Question: Class one lightning protection terminals have a min.diameter ofAnswer: 3/8 Question: 2 copper air terminalAnswer: 1/2 Question: Class 1 air tetminalAnswer: 1/2 Question: Class 2 air terminalAnswer: 5/8 Question: Class 1Answer: 75' or smaller than class 2 Question: 2Answer: 75' and heavier Question: Ground Rods min. Answer: 10 ft. Question: What needs to be at least 10 inches above the object of area its protecting of strikesAnswer: The tip of the air Question: For lightning protection systems all require at least 2 down conductors and at least one additional down conductorAnswer: For 100 ft. Of roof perimeter over 250 ft. Question: NFPA _______ is the standard for the installation of lightning protection systemsAnswer: Question: 4 main parts of lightning systemsAnswer: 1.intercept 2.strike devices3.termunal4.lightning rods Question: 2nd part lightning strikes down the building.includs the bonding of metallic bodies to a LPS conductors in an attempt to keep all metallic components at ___________during lightning strike eventAnswer: potential Question: 3rd Answer: Disperses lightning strike safety to earth materials,ground rods ,ground rings,radials Question: 4th Answer: Surge suppression devices to dispose of ant unwanted electrical currents attempting to enter the building through wiring Question: Bimetallic can't be used within______ of earths surfaceAnswer: 18 Question: ring electrodeAnswer: Conductor encircles a structure that is in contact with earth Question: If you have pride you also have to Answer: and dedication Question: LabelledAnswer: It means there is some sort of symbol or identifying mark from an that is acceptable to AHJ Question: ListedAnswer: When it is on a list by an organization Question: Loop Answer: A that encircles a structure that interconnecs ground electrodes Question: Depth of topsoil before in concreteAnswer: Less than 18 Question: How many feet between supports of Answer: 3ft. Question: Air terminals that extend 24 inches above an object are permitted to be in place of intervals not exceeding ______Answer: 25 ft. Question: Lightning protection in a basement and space?Answer: Close as possible to outer Question: Bonding Answer: A conductor used for potential equalization between grounded metal bodies and a Question: The surge protection devices installed at a service entrance have a min rating of 40 ka and a discharge ofAnswer: 20 ka Question: Main Answer: A conductor that lightning currents between strike terminations devices and grounding electrodes Question: What is not found on a plateAnswer: VA Question: The of an alternator is controlled by a stator or rotor wire length strength of magnetic fieldAnswer: of motor RPM,speed of generator Question: flux is densist and magnetic force is strongest Answer: At the poles north pole to pole Question: Change the of DC motorAnswer: Commutator Question: Change the direction of ac Answer: Switch the Question: Trouble motors use aAnswer: Digital multi Question: What is connected to the of a wound rotor motor specifically the set of secondary resistorAnswer: Slip Question: 1 HP =Answer: 746 Question: The actual voltage applied to s motor should be within plus or minus_____ of the motors nameplate voltageAnswer: 10% Question: Motor power is rated Answer: /watts Question: Motor Answer: Normal torque and normal starting current Question: Motor Answer: Normal torque low starting current *most common Question: Motor CAnswer: Has a high starting torque and low current Question: Motor DAnswer: High starting torque high slip and low starting Question: A _______ DC motor has the highest starting torque characteristicAnswer: Question: In a 2 pole single phase motor the start winding is placed ____ from the run windingAnswer: 90 Question: In a capacitor motor forward and reverse I'd controlled by a Answer: Drum Question: The _______ of a squirrel cage induction motor are short cktAnswer: windings Question: The ______ of a wound rotor motor ate not short cktAnswer: windings Question: The _______is used in a DC generator to keep the polarity and output in one directionAnswer: Question: Overload Answer: Time delay devices that allow temporary without disconnecting the motor Question: Primary Answer: Blue green Question: Secondary Answer: Cyan yellow Question: How do u lightingAnswer: Footcandles Question: What lighting is Answer: A Question: The visual task occurs at the ______ in the kitchenAnswer: level Question: Lumen Answer: Describes how long a light source will retain its own output Question: What is Answer: Seasonal disorder Question: SAD and circadian are known as what type of Answer: Photo biological Question: Argon and Answer: Combined with vaporized produce visible light with phosphor Question: Chief disadvantage to use his and ballast lifting systems is Answer: maintenance Question: Configurable Answer: Relay designed to accept additional sets of contacts add ons Question: Machine control Answer: Electromagnetic relay that consists of several typically 2-8 up to 12 Question: relayAnswer: A really that enables the energy in a high ckt to be switched by a low power control signal Question: Recommended d.b. for situation Answer: 25 above ambient Question: What % of the world used Answer: 63% Question: Type of Answer: Type 1 I door,2 outdoor,3 both 4 Question: Size iecAnswer: 16 or 22.5 Question: Answer: 30.5 |
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