Just like Humans have their sensing organs, the automobiles have their measurement tools by which they sense the environment and status of their machinery. Given below are top 15 automotive sensors which are vital for cars, vehicles and other automobiles. Airbag sensor An airbag sensor is a safety device which senses the collision/sudden deceleration of car and … Read more
Question: Why isolator is known as offload device? Answer: Isolator is a knife switch responsible for isolating a portion of the circuit from the power system. It should be opened after switching off the connected breakers, or else the current will generate heavy arcs spanning over meters. Other questions: Why liquid fuels are preferred over … Read more
Question: How many types of faults exist on the power system and how they are classified? Answer: Generally four types of faults exist and are classified into two categories. Symmetrical faults: They give rise to symmetrical equal currents having a displacement of 120°. Unsymmetrical faults: They gave rise to unsymmetrical currents having unequal displacements. List … Read more
Question: Explain the basic difference between base load and peak load power plants? Answer: Base load power plant powers the continuous electrical load which occurs throughout the day. A peak load power plant runs to meet the electrical demand during the peak hours. Difference between Base load and Peak Baseload is the normal load which … Read more
Question: Why surge tank is built (installed) with close conduit hydroelectric power plants? Answer: Closed conduit of dam faces the irregular pressure of water under varying loads. A surge tank is installed for relieving the conduit pipes under varying loads. Explanation In hydroelectrical power plants, water conduits connect the link to the turbine housing. During … Read more
Question: Name the unique feature of the nuclear power plant which distinguishes it from conventional plants? Answer: The unique feature of the plant is enormous power capability of nuclear fuel. Very small amount of nuclear fuel can generate an enormous quantity of electricity. It is estimated that 1 kg of uranium can produce energy as … Read more
Question: What is the role of the regenerator in gas power plants? Answer: A regenerator recovers the waste heat from exhaust gases of the gas turbine. Explanation Majority of power plants use WHR (Waste heat recovery) cycle for improving the efficiency of the cycle. In gas power plants the waste heat from exhaust gases of … Read more
Question: Why liquid fuels are preferred over solid fuels? Answer: Liquid fuels can be easily handled, utilized and controlled. The solid fuels are comparatively difficult in terms of handling, utilization, and control. Furthermore, disposal of waste products is larger in the quantity which becomes problematic.
Question: What happens when a 60 Hz transformer is operated on 50 Hz? Answer: The peak flux and magnetization current of a 60 Hz transformer increase when operated on 50 Hz supply. Explanation The flux in a transformer is defined as the ratio of voltage to frequency. Mathematically, Ømax = [Vmax / f ] * … Read more
Question: Why transformer core is laminated? Answer: Transformer core is laminated to minimize the eddy current. Explanation: What is laminated core? The term laminated core indicates a layered core instead of a single solid core. (See figure below). Eddy currents are current loops generated by changing magnetic fields. They flow in a perpendicular plane to … Read more