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

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

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

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

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

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A uniform illumination of 150 lux is to be obtained on the floor of a room measuring 15m x 15m by arranging electric lights suitably. Calculate the number of lamps and wattage of each lamp if lamp efficiency is 20 lumens/watt. Assume and write suitable values of constants required for this calculation.

A uniform illumination of 150 lux is to be obtained on the floor of a room measuring 15m x 15m by arranging electric lights suitably. Calculate the number of lamps and wattage of each ... lamp efficiency is 20 lumens/watt. Assume and write suitable values of constants required for this calculation.

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

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

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

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Explain with justification two uses of each of two following as an electrical conductor: (i) Brass (ii) Silver.

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An industrial consumer charged with the scheduled tariff of Rs.250 /kVA per month for maximum demand and 150 paisa per unit consumed for load factor of 60% and 80%. Find overall cost per unit at i) unity P.F. ii) 0.9 P.F. consider maximum demand of 50 kVA.
Answer : To solve this, we need to calculate the total cost of electricity consumption for an industrial consumer, considering the maximum demand (MD), load factor (LF), and power factor (PF) at ... tariff is based on kVA, and the load factor and total consumption determine the cost more significantly....

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Find the number of address lines required for (i) 4K RAM (ii) 8K ROM.

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Explain the lighting scheme to be designed for each of the following (i) Special ward in hospitals (ii) Dentist’s Cabin.

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Explain lighting scheme to be designed for each of the following (i) operation theatre in hospital (ii) general ward in hospitals.

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Select or suggest any two applications for: (i) D.C shunt motor (ii) D.C series motor.

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A workshop measures 10m × 25m. The shop is illuminated by 24 lamps of 200 watts each. The lumen efficiency of each lamp is 15 lumens per watt. Depreciation factor is assumed to be 0.8 and a coefficient of utilization 0.5. Determine the illumination on the working plane.

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State the criteria for the selection of a power transformer as per IS:10028 (Part–I).

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

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Describe the following energy conservation techniques in lighting system: i) replacing lamp source ii) using light control gear.

Describe the following energy conservation techniques in lighting system: i) replacing lamp source ii) using light control gear.
Answer : Here's a simple breakdown of the two energy conservation techniques in a lighting system: ### 1. **Replacing Lamp Source** Replacing the lamp source refers to swapping out older, ... can be significantly reduced. This helps in cutting down electricity costs and promoting sustainable energy use....

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State the function of following parts in Induction motor: (i) Stator (ii) Sliprings

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State the function of following parts in Induction motor. (i) Stator (ii) Sliprings

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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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