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A post light has a 120-volt, 60-watt lamp installed. The lamp has an expected lamp life of 1000 hours. The homeowner installed a dimmer ahead of the post light and leaves the dimmer set so the output voltage is 100 volts. The lamp burns slightly dimmer when operated at 100 volts, but this is not a problem. What is the expected lamp life when operated at 100 volts?____________________
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- 5. When seeking to measure the voltage of a wall outlet (120 Volts AC) an electie: needs to do the following to prepare the Simpson 260 meter for measurement an the words to make the following statements correct). a. Set the function switch to b. The black lead should be inserted in the jack. c. The red lead should be inserted in the jack. d. The range switch should be set to the position. Note the safety warning at the heading of Section 4.10. The Simpson folks are serious about this and so should we all be. 150 assign_ELTE108_Handout_Lab_02_2020-02-05 Page 4 of 12arrow_forwardThree types of electric devices A, B, and C are connected in series across a 115-volt a-c source, and the voltage drops across the individual units are equal. If Eв leads EA by 90 electrical! degrees_____Ec______behind Ex by 90 electrical degrees, what are the emfs across A,B,and C?arrow_forwardA circuit breaker is _______________________ a. used to detect a fault b. has a fuse elment c. has 3 contacts d. used at low voltage onlyarrow_forward
- oleg is using a multimeter to test the circuit branch he's just installed. after turning off the current to the circuit at the service panel, he'll first attach one probe to the ----- in the end of the run. a. black wire b. box c. white wire d. ground wire Please answer with explanation In typing formatarrow_forwardCreate an electrical diagram.: Lamps A and D are controlled individually by a single pole switch in one location and Lamps B and C are controlled by a single pole switch. Have one master switch for all lightings.arrow_forward2. A facility manager replaces all the TS lights in an office when they have reached 80% of their rated life of 20,000 hours. The lights operate for 12 hours each day, 5 days per week for 52 weeks of the year. What is the group re-lamping interval for these lights? a. 3.7 years b. 4.6 years c. 5.1 years d. 6.4 yearsarrow_forward
- 2. When working on a high - voltage system , it is best to keep anyone who is not part of the ser vice away from you and the car by creating a buffer zone around the car . Technician A makes sure the outside edges of the zone are at least one foot away from the car . Technician B places B orange cones to define the outer boundaries of the zone. Who is correct ?arrow_forwardAccording to the following specifications, a single solar 295-watt solar panel has maximum power operation voltage at 24 volts. What is the maximum number of solar panels that can be used in a single string? a. 35 solar panels. b. 30 solar panels. c. 25 solar panels. d. 40 solar panels. e. 20 solar panels.arrow_forwardNormally tap changer selection range + or - _____ % in steps of 2.5 %. Three resistors are connected in series with 50, 40, and 20 ohms, connected across a 220 volts supply what is the voltages across 40 ohms resistor? Three resistors are connected in parallel with 50, 40, and 20 ohms, connected across a 220 volts supply what is the current in the 40 ohms resistor? Three resistors are connected in series with 50, 40, and 20 ohms, connected across a 220 volts supply what is the voltages across 20 ohms resistor?arrow_forward
- Circuit 1 – Lighting Load by the Area Method a. Determine the wattage required per square area. b. Determine the current load (230 volts) c. Compute the actual lighting load d. Solve the actual current load e. Determine the size of the branch Circuit wire. f. Determine the size of conduit Pipe. g. Determine the size of size or Rating of the branch circuit Protectionarrow_forwardIf two 115-volt loads were connectedin parallel with 240 volts, they would__________.a. burn dimlyb. immediately burn outc. burn correctlyd. none of the abovearrow_forwardThe protective devices, such as ground wires, lightning arrestors, circuit breakers, relays are used to: Select one: a. step up the voltage. O b. Protect equipment and devices of the power system. O c. None of the above O d. step down the voltage.arrow_forward
- EBK ELECTRICAL WIRING RESIDENTIALElectrical EngineeringISBN:9781337516549Author:SimmonsPublisher:CENGAGE LEARNING - CONSIGNMENT