Motor Current Signature Analysis (MCSA) is a diagnostic techniques for detecting faults in electric motors and their driven equipment. By analyzing the current drawn by a motor during operation, we can identify developing problems before they lead to actual failures, enabling the transition from reactive to predictive maintenance strategies. Unlike traditional vibration analysis or thermal …
Q1. The first political association in the Bombay Presidency was established by (a) Gopal Krishna Gokhale in 1905 (b) S. N. Bannerjee in 1894 (c) Dadabhai Naoroji in 1852 (d) Annie Besant in 1924 (UPSC Prelims 1986) Answer: (c) Dadabhai Naoroji in 1852 Explanation: The earliest political association in the Bombay Presidency was the Bombay …
Q1. Arrange the following in a chronological order (i) Surat Split (ii) Formation of Muslim League (iii) Partition of Bengal (iv) Regulating Act (a) (i), (ii), (iii), (iv) (b) (iv), (iii), (ii), (i) (c) (ii), (i), (iv), (iii) (d) (ii), (iii), (iv), (i) (UPSC Prelims 1986) Answer: (b) (iv), (iii), (ii), (i) Explanation: Chronological order: …
Q1. Which of the following statements is incorrect ? (a) Entropy is a quantity introduced to give clear expression to the results of thermodynamics (b) Change in entropy is defined as the ratio of the amount of heat taken up to the absolute temperature (c) Change in entropy is directly proportional to the amount of …
A capacitor is a fundamental passive electrical component that stores electrical energy in an electric field. It consists of two conducting surfaces (plates) separated by an insulating material called a dielectric. When a potential difference is applied across the plates, electric charges accumulate on them, creating an electric field in the dielectric medium. Basic Principles …
Q1. Rajagopalachari’s formula was (a) Merger of princely States (b) Formulation of a separate Muslim State (c) Plebiscite to Muslims whether they should form a separate State (d) Forming a Constituent Assembly (UPSC Prelims 1986) Answer: (c) Plebiscite to Muslims whether they should form a separate State Explanation: The Rajagopalachari formula proposed a plebiscite in …
A three phase induction motor is one of the most widely used electrical machines in industrial and domestic applications due to its simple construction, ruggedness, low cost, and high reliability. It converts three phase electrical energy into mechanical energy through the principle of electromagnetic induction. The machine was Invented by Nikola Tesla in 1887. …
Q1. High tides at antipodes are caused due to (a) Gravitational pull of the moon and the sun (b) Gravitational pull of the sun (c) Centrifugal, centripetal and gravitational pull of the sun (d) Centrifugal, centripetal and gravitational pull of the sun and the moon (UPSC Prelims 1986) Answer: (d) Centrifugal, centripetal and gravitational pull …
Q1. Pumice is derived from (a) Volcanic rock (b) Sedimentary rock (c) Igneous rock (d) Acid lava (UPSC Prelims 1986) Answer: (a) Volcanic rock Explanation: Pumice is a light, porous rock formed during volcanic eruptions when gas-rich lava cools rapidly. Its frothy texture is due to trapped gas bubbles, confirming its origin from volcanic rock.
In modern industrial power systems, the reliable operation of motors and generators is critical. These machines represent high capital investment and are often vital to continuous production processes. One of the most effective and widely used protection schemes for safeguarding their windings against internal faults is the Differential Relay. What is a Differential Relay? …
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