State significance of earthing. Draw and explain pipe earthing. State the values of earth resistances for: (i) Substation (ii) Residential wiring (iii) H.T. Line (iv) L.T. Line.

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State Magneto-striction. Draw Hysteresis loop for: (i) High silicon steel (ii) Copper (iii) Soft iron (iv) Wood.

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Classify wiring. State the type of wiring installation used for following applications with justification: (i) Hospital (ii) Spinning mill (iii) Milk Dairy (iv) Hotel.

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Draw and explain the use of: (i) Combination plier (ii) Tester (iii) Wire Striper (iv) Hammer.

Draw and explain the use of: (i) Combination plier (ii) Tester (iii) Wire Striper (iv) Hammer.
Answer : Here's an explanation and description of the use of each tool: ### (i) **Combination Pliers** - **Image Description:** Combination pliers are typically a tool with a pair of jaws that can ... electrical devices or panel boxes. Let me know if you'd like a visual representation of these tools!...

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Select the illumination level required as per ISI for the following working planes in residential buildings (i) Kitchen sink (ii) Staircase (iii) Dining room (iv) Study room.

Select the illumination level required as per ISI for the following working planes in residential buildings (i) Kitchen sink (ii) Staircase (iii) Dining room (iv) Study room.
Answer : As per **ISI (Indian Standards, IS: 3646 Part 2)** recommendations for lighting in residential buildings, the **illumination level** (also called **lux level**) required for different working areas is given ... while reading or writing.)_ Let me know if you want a simple table or diagram for this....

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Select illumination level required as per ISI for the following working planes in residential building (i) kitchen (ii) living room (iii) dining room (iv) study room.

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Select insulating materials for following parts: (i) Insulation between heating element and base plate of electric iron. (ii) Insulation used over copper or aluminium conductor used for making coils. (iii) Transformer bushings. (iv) Insulation between transmission line and pole.
Answer : Here are the insulating materials typically used for each of the given applications: 1. **Insulation between heating element and base plate of electric iron**: ** ... on their insulating properties, heat resistance, dielectric strength, and ability to withstand environmental conditions....

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Draw symbol of following: i) Earth Switch ii) Lightning arrester iii) Circuit breaker v) Isolator

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State two insulators of following types along with their areas of application: (i) Class A (ii) Class E (iii) Class H.

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State the use of following: (i) Screw driver (ii) Nose pliers (iii) Wire gauge (iv) Test lamp.

State the use of following: (i) Screw driver (ii) Nose pliers (iii) Wire gauge (iv) Test lamp.
Answer : Sure! Here's a simple explanation of each tool and its use: 1. **Screwdriver**: A screwdriver is a tool used for turning screws to fasten or loosen them. It typically has a handle ... or wire has current. Each of these tools plays a crucial role in everyday electrical and electronics work!...

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State functions of the following parts of d.c motor: (i) Pole shoe (ii) Commutator (iii) Brushes (iv) Yoke.

State functions of the following parts of d.c motor: (i) Pole shoe (ii) Commutator (iii) Brushes (iv) Yoke.
Answer : Here are the functions of the given parts of a DC motor: ### 1. **Pole Shoe** - **Function**: The pole shoe is part of the stator and helps distribute the magnetic field ... a vital role in the operation of a DC motor, working together to produce continuous and controlled rotational movement....

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Compare Horizontal axis and vertical axis wind machines on the basis of: (i) Power captured for the same tower height. (ii) Noise problem. (iii) Complexity of design and yaw mechanism (iv) Effect of fatigue arising from numerous resonances in structure.

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Explain the function of: (i) DB (ii) Socket (iii) Cable (iv) Switch.

Explain the function of: (i) DB (ii) Socket (iii) Cable (iv) Switch.
Answer : Explain the function of: (i) DB (ii) Socket (iii) Cable (iv) Switch....

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A 3 φ I.M. has synchronous speed of 250rpm and 4% slip at full load. The rotor has a resistance of 0.02Ω/ph and stand still reactance of 0.15Ω/ph. Calculate i) The speed at which max torque is developed. ii) The ratio of maximum to F. L. torque. iii) The ratio of maximum to starting torque.

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Compare simple KitKat fuse with MCB for i) Reliability ii) Braking capacity iii) Cost iv) Applications.

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Compare copper and aluminium on the basis of: (i) Tensile strength (ii) Conductivity (iii) Specific gravity (iv) Application.

Compare copper and aluminium on the basis of: (i) Tensile strength (ii) Conductivity (iii) Specific gravity (iv) Application.
Answer : Here's a simple comparison between copper and aluminum based on the four properties you mentioned: ### 1. **Tensile Strength:** - **Copper:** Copper has a higher tensile ... and mechanical applications, while aluminum is preferred where weight, cost, and corrosion resistance are more important....

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Name the material used and the sensitivity of the following thermocouple type: (i) J (ii) K (iii) R (iv) S.

Name the material used and the sensitivity of the following thermocouple type: (i) J (ii) K (iii) R (iv) S.
Answer : Here are the materials used and the sensitivity of the given thermocouple types: 1. **Type J**: - **Materials Used**: Iron (Fe) for the positive leg and Constantan (Copper-Nickel alloy ... with Type K covering a wide range and Types R and S being more suitable for high-temperature applications....

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Compare RTD and thermistor on the basis of: (i) temperature coefficient (ii) linearity (iii) temperature range (iv) cost.

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The power input to a 500V 50Hz 6Pole 3 phase induction motor running at 975 rpm is 40 kW. The stator losses are 1kW and friction and windage losses are 2kW. Calculate: (i) Slip (ii) Rotor copper loss (iii) Shaft power (iv) Efficiency

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Give one application of (i) Mineral oil (ii) Varnish (iii) Synthetic oil (iv) Vegetable oil.

Give one application of (i) Mineral oil (ii) Varnish (iii) Synthetic oil (iv) Vegetable oil.
Answer : Here's an application for each: 1. **Mineral Oil** **Application:** **Insulating Oil in Transformers** Mineral oil is widely used as an insulating and cooling medium ... diesel. It can be processed into biodiesel by a chemical process called transesterification and used in diesel engines....

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Name any two applications of following gases. (i) Nitrogen (ii) Hydrogen (iii) Sf6 (iv) Air.

Name any two applications of following gases. (i) Nitrogen (ii) Hydrogen (iii) Sf6 (iv) Air.
Answer : Here are two applications for each of the gases: 1. **Nitrogen (N₂)**: - **Inert atmosphere for chemical reactions**: Nitrogen is used to provide an inert atmosphere for ... used in various industrial applications, including in pneumatic tools, air brakes in vehicles, and air compressors....

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Give one application each of the following transducer: (i) LVDT (ii) RVDT (iii) Capacitive (iv) Piezoelectric.

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Write one example of each type: (i) Active transducer (ii) Primary transducer (iii) Electrical transducer (iv) Digital transducer.

Write one example of each type: (i) Active transducer (ii) Primary transducer (iii) Electrical transducer (iv) Digital transducer.
Answer : Here are examples for each type of transducer: 1. **Active Transducer**: - **Example**: **Thermocouple** - **Explanation**: An active transducer generates an electrical ... in converting real-world physical signals into measurable outputs, whether they are electrical, digital, or otherwise!...

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Describe the following assembler directives with one example of each: (i) ORG (ii) DB (iii) EQU (iv) END (v) CODE (vi) DATA.

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Describe the function of the following pins of 8051: (i) PSEN (ii) RESET (iii) ALE (iv) EA.

Describe the function of the following pins of 8051: (i) PSEN (ii) RESET (iii) ALE (iv) EA.
Answer : Here's a simple explanation of the function of the following pins in the 8051 microcontroller: ### 1. **PSEN (Program Store Enable)**: - **Function**: The PSEN pin is used to enable the ... **ALE**: Latches the low-order address. - **EA**: Selects between internal and external program memory....

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Define the terms: (i) Load factor (ii) Diversity factor (iii) Demand factor (iv) Plant capacity factor.

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Define the following terms: (i) Average demand (ii) Load factor (iii) Plant capacity factor (iv) Plant use factor

Define the following terms: (i) Average demand (ii) Load factor (iii) Plant capacity factor (iv) Plant use factor
Answer : Here are the definitions of the terms: 1. **Average Demand**: It refers to the average amount of electricity or power consumed over a specific period, usually measured in ... ] These terms are important to evaluate the efficiency and performance of power plants and electrical systems....

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Define the following terms. (i) Precision (ii) Drift (iii) Resolution (iv) Back lash

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Compare orifice plate with Venturi tube with reference to: (i) Working principle (ii) Construction (iii) Cost (iv) Pressure loss.

Compare orifice plate with Venturi tube with reference to: (i) Working principle (ii) Construction (iii) Cost (iv) Pressure loss.
Answer : ### Comparison of Orifice Plate and Venturi Tube Both orifice plates and Venturi tubes are devices used to measure the flow rate of fluids in pipelines. Here's a comparison of the two based on various aspects ... loss**, and are willing to spend more, a **Venturi tube** would be more suitable....

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Define the following terms related to logic families: (i) Noise Margin (ii) FAN-OUT (iii) Propagation delay (iv) Power dissipation.

Define the following terms related to logic families: (i) Noise Margin (ii) FAN-OUT (iii) Propagation delay (iv) Power dissipation.
Answer : Here are the definitions of the terms related to logic families: ### (i) **Noise Margin** Noise margin is the measure of how much noise a logic gate or circuit can tolerate ... concepts are critical for understanding how logic circuits perform and how to optimize them for different applications....

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Define the following terms with respect to protective relays: i) Relay time ii) Reset current iii) Plug setting multiplier iv) Time setting multiplier.

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Define the following terms related to circuit breaker: i) Breaking Capacity ii) Making Capacity iii) Short time rating iv) Normal current rating.

Define the following terms related to circuit breaker: i) Breaking Capacity ii) Making Capacity iii) Short time rating iv) Normal current rating.
Answer : Here's a simple explanation of each of the terms related to circuit breakers: 1. **Breaking Capacity**: This is the maximum fault current that a circuit breaker can ... help ensure that circuit breakers can protect electrical circuits from damage caused by overcurrent or fault conditions....

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Define the following terms related to CB: i) Rated normal current ii) Rated breaking current iii) Short time rating iv) Symmetrical breaking current.

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Explain the following troubles and related remedies in an ultrasonic flow meter: (i) Meter does not show reading (ii) Meter shows less value of flow measured (iii) Meter shows a high value of flow measured.

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Explain with neat sketch: (i) Earth resistance measurement using earth tester (ii) High resistance measurement using megger.

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Explain the use of the following components in electrical wiring system and give specification of each: (i) MCB (ii) ELCB.

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A three-phase transformer having a line voltage ratio of 0.4 kV/11kV is connected Star/Delta and protective transformers on the 0.4 kV side have a current ratio of 500/5. Calculate the ratio of the protective transformers on the 11 kV side. Draw a neat circuit diagram and indicate the given values at appropriate places.

A three-phase transformer having a line voltage ratio of 0.4 kV/11kV is connected Star/Delta and protective transformers on the 0.4 kV side have a current ratio of 500/5. Calculate the ratio of ... on the 11 kV side. Draw a neat circuit diagram and indicate the given values at appropriate places.

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Explain following wiring systems: (i) Concealed wiring (ii) Metal conduit wiring.

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Draw the circuit diagram and phasor diagram of nominal T method of medium transmission line.

Draw the circuit diagram and phasor diagram of nominal T method of medium transmission line.
Answer : ### Nominal T Method of Medium Transmission Line In the **Nominal T method** of representing a medium transmission line, the series impedance (Z) is represented in the form of a "T", where the series impedance is placed in the middle of the ... | / | Is ----|...

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Draw the symbols and state their function of components used in substation (any six).

Draw the symbols and state their function of components used in substation (any six).
Answer : Here are six common components used in substations, along with their symbols and functions: ### 1. **Circuit Breaker (CB)** - **Symbol:** ![Circuit Breaker Symbol]( ... to ensure the efficient and safe operation of the substation, protecting both the equipment and the electrical network....

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State the recommended illumination level for (i) library and (ii) operation theatre.

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State suitable single phase motor for following applications: (i) Table fan (ii) Mixers and Grinders

State suitable single phase motor for following applications: (i) Table fan (ii) Mixers and Grinders
Answer : For the given applications, here are the suitable single-phase motors: 1. **Table Fan**: **Suitable Motor**: **Shaded Pole Motor** - **Reason**: Shaded pole motors are ... running at high speeds, which is ideal for the heavy load and high-speed operation required in mixers and grinders....

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Draw the following and write one application of each: (i) Well type manometer (ii) Bellows.

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Draw neat circuit diagram of (i) Feeder reactor and (ii) Generator reactor

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Related to ultrasonic flow meter: (i) Give any two types of it (ii) Write any two specifications (iii) Write two advantages over Rotameter.
Answer : ### (i) Two Types of Ultrasonic Flow Meters: 1. **Transit-Time Ultrasonic Flow Meter**: This type uses the difference in time taken for an ultrasonic signal to travel downstream and upstream. The ... and no disruption to the flow, unlike Rotameters, which need to be integrated into the flow path....

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Draw the single line diagram (layout) of 33/11 kV substation.

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Draw wiring diagram for connection of one lamp controlled from two places. State the application of this connection.

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Compare nominal - I and nominal - II method of transmission line (Any six points).

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What does H and L mean on battery?

What does H and L mean on battery?
Answer : On a battery, "H" and "L" typically stand for **High** and **Low**, respectively. These markings are often used to indicate the charge level or operational voltage range of the ... on a specific device, they may refer to the operating conditions or voltage levels needed for optimal performance....

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Draw neat circuit diagrams of i) Feeder reactor ii) Generator reactor.

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Explain with the help of a neat diagram the following methods of speed control for a DC series motor: (i) Field diverter method. (ii) Tapped field method.

Explain with the help of a neat diagram the following methods of speed control for a DC series motor: (i) Field diverter method. (ii) Tapped field method.
Answer : ### Speed Control of DC Series Motor DC series motors are commonly used in applications where the motor needs to run at varying speeds, such as in cranes, electric trains, and ... given armature current, but they come with different complexities and impacts on the overall motor performance....

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State significance of earthing. Draw and explain pipe earthing. State the values of earth resistances for: (i) Substation (ii) Residential wiring (iii) H.T. Line (iv) L.T. Line.

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