In Electrical Engineering, earthing refers to the method of creating low impedance path to the ground. Generally, a rod (known as earth rod) is driven into the earth to which earth conductor is tied. MCQ on Electrical Earthing The earthing rod orientation in the pit should be: 45° Horizontal Vertical 75° Correct answer: 3. Vertical … Read more
Swing bus is also known as: PV bus Voltage-controlled bus Slack bus Load bus Correct answer: 3. Slack bus Explanation: Swing bus is also known as a slack bus. In the swing bus, the voltage and angle are specified.
In the case of Gauss Siedal the number of iterations ___________ with the size of the system: Increase Decrease Remain constant Any of the above Correct answer: 1. Increase Explanation: In the case of Gauss Siedal the number of iterations increases with the size of the system
The number of iterations required for the Newton Raphson method:: Are more than Gauss Siedal method Are less than Gauss Siedal method Are same as Gauss Siedla method Any of the above Correct answer: 2. Are less than Gauss Siedal method Explanation: The Newton Raphson method for load flow analysis requires a smaller number of … Read more
In case of disturbance on WTG: WPP should be stopped Only affected WTG should be removed All WTGs should be removed Correct answer: 2. Only affected WTG should be removed Explanation: During the disturbance, the electrical characteristics at each terminal of the turbine is different from others. Only affected WTG should be removed.
The parameters specified on the load bus are: P and V P and Q Q and Angle Q and V Correct answer: 2. P and Q Explanation: In load bus, P and Q are the input parameters while angle and V are unknown parameters. That’s the reason the load bus is also known as the … Read more
Capacitance can be ignored for which type of transmission lines: Short Medium Long None of these Correct answer: 1. Short Explanation: For short transmission lines, the transmission lines have very small capacitance (which is almost negligible). More Questions on Electric Power Transmission and Distribution: Most commonly used conductor for power transmission is Skin effect of … Read more
Skin effect of transmission lines: Decreases with the diameter of the wire Decreases with increase in frequency Is less for solid conductors None of these Correct answer: 4. None of these Explanation: Whenever the alternating current is flowing through a conductor, it has the tendency to concentrate at the surface. This effect is known as … Read more
The most commonly used conductor for power transmission and distribution is: AAAC ACSR Steel conductor Silver Copper conductor Correct answer: 2. ACSR Explanation: The most commonly used conductor for electric power transmission is ACSR. ACSR stands for aluminum conductor steel reinforced. The outer strands for ACSR consist of stranded aluminum with a central steel strand. … Read more
The number of conductors required for DC power Transmission: Two Three Four Five Correct answer: 1. Two Explanation: Unlike three-phase AC transmission which requires three conductors, a DC power system requires only two conductors. Good to know: The two conductors of DC transmission makes it an economically favorable reason for power transmission.