Transformer Study guides, Class notes & Summaries

Vivint Smart Home Pro Final Exam Questions and 100% Verified Correct Answers 2024 What is the input voltage range of the Doorbell Cam? - Correct Answer 12-24v What is the output voltage of the transformer used to power the SkyControl panel? - Correct Answer 16.5 VAC True or False: When programming a sensor into the sky panel you can type in the serial number or "learn" it in by triggering the device - Correct Answer true When programming a DW21, which loop number is used? 1 2 3 -...

Which of the following is true with regard to switchboards Switchboards are used to subdivide large blocks of power When installing wiring within switchgear, use self adhesive cable ties every ___. 12" (300mm) The maximum voltage that a piece of equipment can withstand is known as its ____. Basic impulse insulation level (BIL) Bolted pressure switches are often used in place of ___. Circuit breakers A transformer's temperature rise rating refers to ___. The max...

PICAT Verification Test practice Questions with 100% Correct Answers In making permanent electronic connections, use? [Ans:- soldering iron When current flow is interrupted by a blown fuse, the circuits becomes? [Ans:- Open A standard multimeter does not measure? [Ans:- frequency Electric current flowing from one component to the next is an example of what kind of circuit? [Ans:- Series In order to make an electric current flow, it is necessary to have? [Ans:- Copper conductors ...

A(n) __________ is a graph showing how an electrical value changes over a period of time. WAVEFORM Ref: 1.09 The ac waveform is called a(n) __________ wave. SINE Ref: 1.14 Frequency is the number of __________ an electrical system goes through in a unit of __________. CYCLES; TIME Ref: 1.19 In what unit is frequency measured? HERTZ (Hz) Ref: 1.20 The number of cycles generated in one complete revolution of an alternator equals half the number of __________. POLES...

NETA III 2024 QUESTIONS WITH CORRECT SOLUTIONS The alternate source for emergency systems are required to be equipped with ground-fault protection of equipment. -Answer-False Which ANSI/IEEE standard covers SF6 circuit breakers? -Answer-C37.04 You measure the winding resistance of a 12.4kV, 1000kVA, Delta-Delta connected transformer with a 100A test set. H1-H2 measures 42.0 microhms, H2-H3 measures 41.9 microhms, and H3- H1 measures 84.0 microhms. What can you conclude from these readings...

What is the first thing a tech should do when arriving at a no combustion call? - Answer- Ask how many times the customer reset the unit. What is the best long term solution for preventing a clogged nozzle? - Answer- -Remove any underground storage tanks. -Install a quality oil filter. -Cut the suction line 10" above the tank outlet to prevent sludge. Hot water and steam valves are interchangeable. - Answer- False When in the presence of a flame, a cad cell normally reads.. - Answe...

1. A contractor wants to raise the car speed from 100fpm to 125fpm, it currently has a 12" sheave. What sheave is required?: Diam=12" 12/4=3" 25fpm=3" 100fpm + 25fpm= 12"+3"= 15" sheave 2. A MOV (Metal Oxide Varistor) burns out. You replace it, but cannot read voltage or resistance. What should you do?: Replace it with a larger MOV 3. On a Ward-Leonard circuit the break is set, but the motor is trying to slip through the break. What is the issue?: Suicide Circuit 4. You have an old DC ...

The cross connection between two supply tanks shall not exceed? - 660 gallons When is an automatic draft control not required? - When the equipment is designed to control the draft. Combustion performance testing can indicate: - Improper air oil mixture, too much combustion air, and low pump pressure. If a second oil-burning appliance is installed in a single chimney, you must insure: - Sufficient draft is available for safe operation of all connected equipment. Delayed ignition can be ca...

SHP Final Exam Questions With 100% Correct Answers True - answerThe firefighter may be installed next to a stand-alone battery smoke detector False - answerWhen performing a full system test, you may bypass any open doors or windows Always enable the emergency - answerWhen programming an skey1,you must False - answerWhen running power to the take345,polarity doesn't apply Audible alarm (7) - answerWhen programming the emergency key for the skey1,which zone/sensor type is used. True - a...

Conductors connected to the high leg of a four-wire delta system be color-coed with what color of insulation or tape? -correct answer -Orange (NEC Section 110.15) Dry-type transformers rated at 112.5kVA or less may be located out in the open provided they are separated from combustible material by a distance of ____. -correct answer -12" If the power factor is improved by the addition of a capacitor, the motor running overcurrent device must be selected based on the ___. -correct answer -...