Utilization of Electrical Engineering (EX-603 (A)) - Important Questions

Calculate the number, rating or candle power of lamps required to produce a given illumination on the working plane/floor of a room of given size using utilization factor and depreciation/maintenance factor.

State and explain the laws of illumination: inverse square law and Lambert's cosine law.

Numerical problem to calculate illumination on the ground under each lamp and midway between two lamps of given candle power, spacing and mounting height.

Explain different methods of energy efficient lighting.

Numerical problem to calculate illumination at room floor corners and wall point due to a lamp of given candle power placed at centre of a room of given dimensions.

Explain different methods available for aiming of lamp in flood lighting.

Explain the design considerations for auditorium lighting.

Discuss the following: Luminous intensity

Describe the working of fluorescent lamps with the help of circuit diagram, explain function of each part.

List the types of lighting schemes and explain the factors to be considered for designing a lighting scheme.

Derive the relation between plane angle and solid angle.

Write down the classification of welding methods based on processes.

Name the different types of heating methods and describe one of them in detail.

State the advantages of electrical heating and calculate power drawn by resistance heating elements in parallel and series for a given supply voltage.

A piece of metal having $50\,grams$ in which a golden layer is to be done if the $3\text{-Ampere}$ current is flowing and electrochemical equivalent $0.065$ then in $30\,minutes$ how much weight of gold should be deposited.

Explain metal arc welding and submerged arc welding methods with necessary illustrations.

Discuss the criteria for selecting frequency for electric heating processes.

List the advantages of electric heating and explain the coreless / high-frequency induction furnace.

Give the induction heating operating principle and the application and with their limitation.

Explain the basic principle of electrolysis. What is electroplating and what for it is done?

Explain in brief arc welding and resistance welding.

Explain electron beam welding method.

For a trapezoidal speed-time curve, derive the expression for maximum (crest) speed.

Given distance between stops, schedule/average speed, acceleration and retardation, draw the speed-time curve and compute run parameters numerically.

Explain why the DC series motor is suitable for electric traction.

What are the characteristics of a good traction system? Justify which motor is suitable for traction system.

Explain the factors affecting energy consumption / specific energy consumption in propelling the train.

For a quadrilateral speed-time curve with coasting, derive the expressions for total distance between stops and speed at the end of coasting.

An electric train has an average speed of 42 km/h on a level track between stops 1.4 km apart. It is accelerated at 1.7 km/h/s and is braked at 3.3 km/h/s. Assuming tractive resistance as 50 N/t. allowing 10% for rotational inertia and efficiency to motors 85%. Estimate the specific energy consumption.

Explain the reasons for having greater coefficient of adhesion in electric traction when compared to steam traction.

Explain the effect of varying acceleration and braking retardation in traction.

Draw the general speed-time curve for main-line service and explain its periods.

Explain dead weight, acceleration weight and train resistance referred to traction.

Name the types of electrical braking and explain regenerative braking (any one method) in detail

Explain individual drive and group drive and compare their relative merits and demerits.

Discuss the following: Electric drives

Explain the calculation of electrical loads for air condition.

What are the advantages of electric drive over all other drives? Explain in brief the selection of motor drive for particular application.

Explain electric vehicle and its components.

Explain why an energy management control system is required in a hybrid electric vehicle (HEV).

Explain whether an elaborate energy management system as used in a hybrid vehicle is required in an electric vehicle.

Write a short note on hybrid vehicles.

What type of transmission system is used in electrical vehicle?

Write a short notes (any two)