- What is conductor connection of exposed conductive parts (chassis) of machines and/or devices with the neutral line
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1 - What is conductor connection of exposed conductive parts (chassis) of machines and/or devices with the neutral line?
A) Zeroing
B) Protection earth
C) Short circuit
D) System earh
E) Fuction earth
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Solved in 2 steps
- Question 1:a) State why voltage control and cable stranding are necessary in powersystemsb) Briefly explain where and how the following state variables ofa power supply grid are controlled.i) Frequencyii) Active powerili) Reactive poweriv Voltage.c.1. Which of the following is one of the three essential functions of an equipment grounding conductor?A. Provide an arc-fault current pathB. Establish groundingC. Establish bondingD. Ensure the system is groundedc.2. What's another name for the three-point method of Earth resistance testing?A. Fall-of-potentialB. Line surgeC. Spatial shieldingD. Leakage current c.3. If the National Electrical Code provides a requirement to ground equipment, it generally implies thatthere will be a direct connection to the Earth of a connection through a/anA. grounding electrode conductor.B. equipment grounding conductor.C. equipotential bonding conductor.D. bonding conductor.12 - Due to the effect of the resistance of the cable connected to RTD, two-wire cables up to ……. meters and three-wire cables up to ……... meters are used in standard designs. A) 10-150B) 40-500C) 50-195D) 30-230E) 200-1000
- low voltage systems What is the system called if current flows through its neutral conductor? a)Balanced b)Unbalanced c)Proactive d)ComplexA DC is supplied through a solid conductor cable. The fault in the cable can be determined by using Murray Loop Test. The healthy cable has the insulation resistance of 1 kilo Ohms per meter. No fault occurred till the first 10 km. The core of healthy cable has the circumference of 7.86cm. If the resistivity of insulation is 900 G Ohm-mm, what is the diameter of the cable.A set of conductors is used to supply residential unit with a total load current of 60 A at a single-phase supply voltage of 230 V. What would be the minimum size of the conductor to be used to achieve at least 5% voltage drop? The total conductor length is 300 ft. ..
- Count the neutral conductor of a 4-wire, 3-phase, wye-connected circuit when the major portion of the load is electric discharge lighting (fluorescent, mercury vapor, high-pressure sodium, etc.), data processing, and other loads where the neutral conductor carries a. grounding b. traveler C. d. current. third harmonic unbalanced conductors to overheat but often overlooked is the possibility ofUnderground service conductors shall have [Fill-in-the-blank]. A)adequate mechanical strength. B)sufficient ampacity for the loads calculated. C)none of these. D)adequate mechanical strength and sufficient ampacity for the loads calculated.A power generation plant connected to bulk load of high voltage industries shown in Figure Q3 has specifications given in Table Q3. Each equipment reactance is expressed in per unit on a common base of 100 MVA. a) Find the fault level for each bus bar in the generation plant. GI G2 TI Figure Q3: Single line diagram of a power generation plant Table Q3: Specifications of power system components Power System Component Voltage Rating X MVA Rating (kV) (pu) GI 50 33 0.2 G2 40 33 0.18 50 33/11 0.1 T2 40 33/11 0.1
- Which of the following is not a criteria for the mechanical design of an overhead line? O Minimum distance between conductor and earth O Maximum clearance between the conductor and ground O Tensile stress of the conductor O Thermal capacity of the conductor must be adequate3. The three bus-bar conductors in an outdoor sub-station are supplied by units ofpost insulators. Each unit consists of a stack of 3-pin insulators fixed one on the top of the other. The voltage across the lowest insulator is 8-45 kV and that across the next is 7-25 kV. Find the bus-bar voltage of the station. [38-8 kV]H2. A/An _______ is an insulating tube or sleeve that protects an electrical conductor where it passesthrough a hole.A. expansion fittingB. couplingC. gland nutD. bushing H3. Conductors that are larger than AWG size 8 will come only as a/an _______ conductor.A. aluminumEnd of examB. coveredC. solidD. stranded