Ballast is - Study guides, Class notes & Summaries

Combustible Liquid - A liquid with a flash point ABOVE 100F 12.5 - If the current flowing out from an electrical panel is 12.5 amps, and it then flows through an electrical load of 1500 watts, what is the amperage of the remaining current flow of the return circuit? 1000 - If a hair dryer draws 8.3amps (in a home with 120-volt service), what is the wattage? *Power (P) = current (I) x voltage (V) Watts = amps x volts 1987 - The year of the first edition of NFPA 1033 1.5 times - ...

1-1 Light output is measured in ...? a) Footcandles b) Lumens c) Watts d) Electrons - b) Lumens 1-2 Rated lamp life is the time when ...? a) Lamps reach 20,000 hours of operation b) 1/2 of a large group of lamps are expected to have failed c) All lamps are expected to fail d) It's the best time to group relamp - b) 1/2 of a large group of lamps are expected to have failed 1-3 The Color Rendering Index is a scale that describes how accurately colors look when struck by the light fro...

Which of these is the symbol used for a 4-way switch? - Answer-c.$4 Lighted handle toggle switches utilize a neon lamp that is illuminated when the switch is in the ___ position. - Answer-b.OFF The ungrounded conductor is often called the ___. - Answer-hot Drawing ___ in Figure 112.415 is a framed locking (not key-lock) type switch. - Answer-Not D.VI or E.None of these To convert a conventional duplex receptacle into a split-wired receptacle, the ___ is removed. - Answer-tab Refer...

Steep Fluorescein Pattern - Bright green pooling center, very faint green pooling on diameter of lens Flat Fluorescein Pattern - Bright green pooling on diameter of lens, very faint green in center Against-the-rule Astigmatism Pattern - Bright green pooling horizontally, faint green pooling vertically With-the-rule Astigmatism Pattern - Bright green pooling vertically, faint green pooling horizontally Prism Ballast - Common technique to stabilize lens from rotating. Added thickness ...

Light energy that is NOT absorbed by an object can be _____. - correct answer -reflected from and/or transmitted through the object A light that is considered warm in tone is produced by lamps with color temperatures of _____. - correct answer -3,000°K The resistance of a tungsten filament is ______. - correct answer -much higher after the lamp is turned on The filament of a tungsten-halogen lamp is encased in a capsule containing iodine or _____. - correct answer -bromine gas Durin...

a good reason to take the NAUI Advanced Scuba Diver Course is - to increase your diving abilities, to get oriented to new dive sites, you recently moved into a new diving area the NAUI Advanced Scuba Diver Course is likely to include orientation to which of the following subjects - Exploration and Underwater Mapping while you will receive an introduction to some of the specialty areas of diving, you will not receive enough training to be considered proficient in them - true dive preparatio...

NCLE Practice Test Practical Questions and Answers with Certified Solutions Steep Fluorescein Pattern Bright green pooling center, very faint green pooling on diameter of lens Flat Fluorescein Pattern Bright green pooling on diameter of lens, very faint green in center Against-the-rule Astigmatism Pattern Bright green pooling horizontally, faint green pooling vertically With-the-rule Astigmatism Pattern Bright green pooling vertically, faint green pooling horizontally Prism Ballast Common te...

Delta FA training midterm review with complete solutions What type of reporting system would you use to report issues such as: aircraft emergency, passenger disruption, medical emergency, or security issues? SRS What type of reporting system would you use to report issues such as: catering issues, aircraft cleanliness, flight delays, or IFE issues? FACTS An event such as a passenger illness or failure to comply with FAA regulations needs to be reported in SRS by when? Upon the completion of y...

OECP Exam Questions With 100% Complete Solutions What are the four different types of crane signals? - Answer- Hand Voice Audible New The shaded area on a load chart indicates _______? - Answer- A structural chart The minimum distance to a power line of unknown voltage is ? - Answer- 50' When hoisting personnel and have known voltage, can you use Table A and get closer than 20'? - Answer- Never! What is the minimum tale swing clearance requirement - Answer- 2' What kind of rigger i...

According to the NEC®, the ampacity of branch circuit conductors must be derated when there are more than how many current-carrying conductors in a raceway? - correct answer 3 Air conditioning overcurrent protective devices can never exceed what percentage of the motor-rated load current or the branch circuit selection current (whichever is greater)? - correct answer 225% Conductors must be derated when installed in conduit - correct answer on or above rooftops Continuous loads are cal...