Ac circuits Samenvattingen, Aantekeningen en Examens

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...

NABCEP Associate Exam (retake) Questions And Answers 2023 UL 1741 - ANS Standards for inverters, converters, controller and interconnections UL 1703 - ANS Standard for safety, flite plate, Pv modules and panels What PV panels are made from cylindrical silicon ingot - ANS monocrystalline Residential Pv systems are limited to no more than 24 two-volt cells connected in series - ANS 48V in total per NEC 690.71 Roof mounted systems are mounted on aluminum or stainless steel rail...

F80 Exam Questions and Answers Graded A After what date was the F-24 certificate of Fitness not recognized. July 31, 2014 How often must this certificate be renewed? Every 3 years In what types of buildings and occupancies are coordinators of fire safety and alarm systems in homeless shelter required? Homeless shelters, one-way voice communication systems, or occupied for more tha n fifteen persons for a period of more than 30 days. What is the certificate of occupancy? Determines the number ...

If the heater in a fixed IEC bimetallic overload relay fails, - correct answer -the entire overload relay must be replaced The nameplate of a motor indicates that the motor has an FLC of 15A and a service factor of 1.15, how much additional current can this motor safely handle for intermittent power demands? - correct answer -15A(1.15)= 17.25; 17.25A - 15A= 2.25A The minimum allowable coil control voltage needed to keep an electromechanical device energized is called the ___. - correct ans...

What is the most important law applicable to the study of electricity? - Ohm's Law What are the elements of Ohm's Law? - Voltage, Current & Resistance What are four sources of electrical power? - Mechanical, chemical, photoelectric and thermal What does an electrical circuit consist of? - 1. a source of electrical pressure 2. resistance 3. conductors What represents capacitance in an AC circuit? - a capacitor What is the function of a capacitor? - to store electricity What is the unit...

In capacitors, what is the purpose of the dielectric? - Prevent arcing within the capacitor Which of the following is true about capacitors in AC circuits? - Current leads voltage all the time What describes a capacitor s ability to store an electrical charge? - Capacitance which of the following statements is correct about polarized electrolytic capacitors? - Voltage polarity must be correct What is the time constant for a circuit with 150k ohms and 2 microfarad capacitor? - .3 seco...

The potential difference induced across a coil depends on the number of turns in the coil and on the _________. rate at which the magnetic field changes Which law states that the current in a conductor is proportional to the potential difference across it? Ohm's Law The number of cycles produced in one complete revolution of the rotor in an alternator equals ______ the number of poles. half To find the root mean square, you calculate the square root of the mean of all th...

ATT Test 4 : AC CIRCUITS QUESTIONS SET WITH CORRECT ANSWERS An electrical current that changes both in magnitude and direction. - ANSWER : alternating current AC is developed by sources called _____________. - ANSWER : alternators and generators A device which converts mechanical energy into an alternating electrical current. - ANSWER : alternator A rotating device for converting mechanical energy into an alternating electrical energy. - ANSWER : generator Three basic sine wave ...

ABYC MARINE ELECTRICAL CERTIFICATION EXAM 2024 WITH 100% ACCURATE SOLUTIONS How often (in inches) shall wire bundles be supported? - correct answer Every 18 inches. What type of clamps are to be used for supporting wire bundles when routed over engines and machinery? - correct answer Insulated Metallic Hanger Clamps What tensile force must a 10 Gauge crimp connector withstand for one minute? - correct answer 40 lbs (E-11 Table XV) What is the max allowed unsupported cable length fo...

An inter-circuit short can cause: - ANSWER -" All of the above; Unrelated circuits to operate simultaneously; Components to work at reduced capacity; An over-current situation" Which of the following is addressed by ABYC A-32? - ANSWER -Power conditioning and conversion LED navigation lights are required to meet: - ANSWER -72 Colregs Which of the following are recommended for 3-phase shore power? - ANSWER -Power conditioning and phase-rotation monitoring Which of the following ...