Ac circuit - Study guides, Class notes & Summaries

S-95 FDNY TEST STUDY GUIDE QUESTIONS AND ANSWERS 100% PASS What Can A S95 Holder do? Only visual inspections on smoke alarms Primary Purpose of Fire Alarm Systems on a premise is to warn tenants and transmit signals indicating a fire condition to the FDNY aka Central station Fire Alarm Control Panel (FACP) Monitors inputs and controls output through various types of circuits.The Panel activates the building audible and visual device connected to the fire alarm (horn/strobes) Th...

NETA Level II Exam Questions Correctly Answered 2024.What is the preferred method of performing primary-injection testing on a low voltage circuit breaker with ground fault protection? Use of the manufacturer's test kit or rewiring the neutral CT input is the preferred method of primary-injection testing on a low voltage circuit breaker with ground fault protection, otherwise two poles can be connected in series to provide balanced secondary currents to the trip unit. At what current le...

COSC 325 – Final | Exam Questions With Verified Correct Answers| Latest Update Conductor - ANSWER material that has very little resistance and permits electrons to move through it easily Insulator - ANSWER any material that has a very high resistance and resists the flow of electrons Generated electricity - ANSWER the alternating current (AC) created by power plant generator Three phase - ANSWER three distinct wave cycles, 3-wires, 415V Single phase - ANSWER power supply has o...

The hertz rating of a ac circuit is __ if the frequency is 20 cycles per 1/2 second - ANSWER 40 hertz A circuit has an rms voltage of 120vac, the peak voltage is? - ANSWER 170v The turns ratio of a transformer with 200 turns into primary and 100 turns in the secondary is __ - ANSWER 2:1

An AC circuit consists only of a pure inductance and a power source. The relationship between the voltage and the current in this circuit is that the Correct Answer current lags the voltage The power factor of a load is equal to the ____________ power divided by the ____________ power. Correct Answer True ; apparent A 10-ohms and 20-ohms resistor are connected in parallel. The total line current drawn by this parallel combination is 30 amps. Under these conditions, the line voltage will be...

T/F: Current exists in an ideal capacitor only when its voltage is changing True T/F: In a series capacitor circuit, the largest value of capacitance will have the smallest amount of voltage dropped across it. True T/F: In a series capacitor circuit, the largest value of capacitance will have the largest share of total charge on its plates False T/F: Magnetic lines of force never cross one another True T/F: Current flowing through a conductor creates a magnetic fi...

GFCI stands for... - Answer-Ground Fault Circuit Interrupter T/F A galvanic isolator WILL block stray AC. - Answer-False. A galvanic isolator WILL NOT block AC. It will only blocks stray DC that is moving through the green grounding conductor. T/F An isolation transformer makes a galvanic isolator unnecessary. - Answer-True. An isolation transformer works through electromagnetic _________. - Answer-Induction A reverse polarity indicator is placed between which two wires? Why? - Answer-White...

ASVAB MEPS Exam 223 Questions with Verified Answers A radar is designed to report the track of an aircraft every second. If this radar reports 30 tracks in one minute, what percentage of the time did the radar track the aircraft? - CORRECT ANSWER 50% Jerry walked a dog from 6:40 a.m. to 7:30 a.m. one day. If he was paid at the rate of $6 per hour, how much did he earn that day? - CORRECT ANSWER $5.00 A woman is looking for a bigger square office. She finds an office twice the area of he...

Electrical Shock - correct answer Sensation and muscular spasm cause when electric current passes through the body Voltage - correct answer Potential of electric energy; pressure of electrons pushing away from each other Current - correct answer Flow of electrons Most dangerous paths - correct answer Hand to hand & left hand to either foot Factors affecting shock - correct answer Amount of current, path of current, amount of body resistance, length of time current flows in ...

When connecting a 3-phase motor the three lines (T1,T2 and T3) are usually connected to __________. - L1, L2, and L3 Electricians use __________ to prevent damage to electrical wiring running to the machine. - rigid and flexible conduit When the wire or foil strip inside a fuse melts, the fuse is said to be __________. - blown The difference between a fuse and a circuit breaker is __________. - circuit breakers can be reset and used again The amount two electrical...