Electrical Engineering Questions And Answers
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Electrical Engineering Questions and Answers - Chapters
- Electric Circuit and Ohm's Law Questions & Answers
- Synchronous Generator Questions & Answers
- Synchronous Motor Questions and Answers
- Single Phase Motor Questions and Answers
- Electric Power Generation Questions and Answers
- Power Generation Economics Questions and Answers
- Electric Transmission and Distribution Questions and Answers
- Circuit Breakers Questions & Answers
- High Voltage Engineering Questions & Answers
- Rectifiers and Converters Questions & Answers
- Electric Illumination Questions & Answers
- Electric Traction Questions & Answers
- Electric Machine Design Questions & Answers
- Industrial Drives Questions & Answers
- Computation Questions & Answers
Electric Circuit and Ohm's Law Questions & Answers
1. Two 1 kilo ohm, 1/2 W resistors are connected in series. Their combined resistance value and wattage will be
Electric Circuit and Ohm's Law Questions & Answers
2. The resistance of a 100 W, 200 V lamp is
Electric Circuit and Ohm's Law Questions & Answers
3. The ratio of the resistance of a 100 W, 220 V lamp to that of a 100 W, 110 V lamp will be nearly
Electric Circuit and Ohm's Law Questions & Answers
4. Which of the following bulbs will have the least resistance ?
Electric Circuit and Ohm's Law Questions & Answers
5. The unit of electrical conductivity is
Synchronous Generator Questions & Answers
1. A three phase alternator has a phase sequence of RYB for its three output voltages. In case the field current is reversed, the phase sequence will become
Synchronous Generator Questions & Answers
2. Two-alternators are running in parallel. If the driving force of both the alternators is changed, this will result in change is
Synchronous Generator Questions & Answers
3. When two alternators are running in parallel, their RKVA load share is changed by changing their ................ while their kW load share is changed by changing their ..............
Synchronous Generator Questions & Answers
4. In order that two alternators be put in parallel, which of the following factors should be identical for both ?
Synchronous Generator Questions & Answers
6. In the above figure, the characteristic for unity power factor is represented by the curve maked
Synchronous Motor Questions and Answers
1. A synchronous motor working on leading power factor and not driving any mechanical, is known
Synchronous Motor Questions and Answers
2. Which motor can conveniently operate on lagging as well as leading power factor ?
Synchronous Motor Questions and Answers
3. The back emf in the stator of a synchronous motor depends on
Synchronous Motor Questions and Answers
4. Which of the following motors is non-self starling ?
Synchronous Motor Questions and Answers
5. In case of a synchronous motor we have
I. Load
II. Speed
III. DC excitation
The magnitude of stator back emf depends on
Single Phase Motor Questions and Answers
1. The capacitance of a small single phase motor will be of the order of
Single Phase Motor Questions and Answers
2. In case of split phase motors the phase shift is usually limited to
Single Phase Motor Questions and Answers
3. For ceiling fans generally the single phase motor used is
Single Phase Motor Questions and Answers
4. In portable tools the speed of the driven shaft is reduced by
Single Phase Motor Questions and Answers
5. Which of the following applications make use of a universal motor ?
Electric Power Generation Questions and Answers
1. In regenerative cycle, bled steam is
Electric Power Generation Questions and Answers
2. Most of the generators in thermal power plants run at
Electric Power Generation Questions and Answers
3. Which of the following is not the voltage at which power is usually transmitted
Electric Power Generation Questions and Answers
4. Overall thermal efficiency of a steam power station is in the range
Electric Power Generation Questions and Answers
5. What is the maximum size of steam turbine usually being installed, for thermal power plants ?
Power Generation Economics Questions and Answers
1. Capital cost per MWh is highest in case of
Power Generation Economics Questions and Answers
2. Fuel transportation cost is least in
Power Generation Economics Questions and Answers
3. In an interconnected system consisting of a nuclear power stations, steam station and diesel generating station, which plant can be used as base load plant ?
Power Generation Economics Questions and Answers
4. Five consumers having peak demands of A, B, C, D, and E have individual load factors of 0.5. It can be concluded that
Power Generation Economics Questions and Answers
5. In a power plant a reserve generating capacity which is in operation but not in services known as
Electric Transmission and Distribution Questions and Answers
1. The inductance of a single phase two wire line is given by (D is the distance between conductors and 2v is the diameter of conductor)
Electric Transmission and Distribution Questions and Answers
2. Between two supports, due to sag the conductor takes the form of
Electric Transmission and Distribution Questions and Answers
3. Presence of ozone as a result of corona is harmful because
Electric Transmission and Distribution Questions and Answers
4. The current drawn by the line due to corona losses is
Electric Transmission and Distribution Questions and Answers
5. Corona effect can be detected by
Circuit Breakers Questions & Answers
1. In a circuit breaker the active recovery voltage depends upon
Circuit Breakers Questions & Answers
2. The transient voltage that appears across the contacts at the instant of arc extinction is called
Circuit Breakers Questions & Answers
3. The normal frequency rms voltage that appears across the breaker poles after final arc extinction has occurred, is
Circuit Breakers Questions & Answers
4. If a circuit breaker does not operate on electrical compound, the probable reason could be
Circuit Breakers Questions & Answers
5. In a circuit breaker if the insulation resistance between phase terminal and earthed frame is less than the specified limit, the probable cause could be
High Voltage Engineering Questions & Answers
1. Corona results in
High Voltage Engineering Questions & Answers
2. All of the following are the preferred properties of a dielectric gas EXCEPT
High Voltage Engineering Questions & Answers
3. Surge voltage originate in power systems due to
High Voltage Engineering Questions & Answers
4. Electro-mechanical breakdown of solid insulating materials occurs due to
High Voltage Engineering Questions & Answers
5. Liquids are generally used as insulating materials up to voltage stresses of about
Rectifiers and Converters Questions & Answers
1. The average life of the glass bulb rectifier is
Rectifiers and Converters Questions & Answers
2. In mercury arc rectifier, voltage drop at anode is due to
Rectifiers and Converters Questions & Answers
3. In a mercury arc rectifier the cathode voltage drop is due to
Rectifiers and Converters Questions & Answers
4. Least undulating current will be delivered by which mercury arc rectifier
Rectifiers and Converters Questions & Answers
5. Ionization potential of mercury is approximately
Electric Illumination Questions & Answers
1. Melting temperature of tungsten is
Electric Illumination Questions & Answers
2. A zero watt lamp consumes
Electric Illumination Questions & Answers
3. The output of a tungsten filament lamp depends on
Electric Illumination Questions & Answers
4. Which bulb operates on lowest power ?
Electric Illumination Questions & Answers
5. Which gas is sometimes used in filament lamps ?
Electric Traction Questions & Answers
1. If the specific energy consumption for suburban services is 50 to 75 watts hours per tonne km, which of the following could be a representative figure for energy consumption on main line service
Electric Traction Questions & Answers
2. The specific energy consumption for suburban services is usually
Electric Traction Questions & Answers
3. Speed of locomotive is controlled by
Electric Traction Questions & Answers
4. A schedule speed of 45 km, per hour is required between two stops 1.5 km apart. The duration of stop is 20 seconds. The acceleration is 2.4 km phps and retardation is 3.2 km phps. For a simplified
trapezoidal curve the maximum speed over the mil will be
Electric Traction Questions & Answers
5. When the speed of the train is estimated taking into account the time of stop at a station in addition to the actual running time between stops, is known as
Electric Machine Design Questions & Answers
1. In large bulky materials, the uni-axial anisotropy can be induced by
Electric Machine Design Questions & Answers
2. Hysteresis loss varies with maximum flux density (B) as
Electric Machine Design Questions & Answers
3. Hysteresis loss varies with frequency (f) as
Electric Machine Design Questions & Answers
4. Which of the following can be worked with higher flux densities ?
Electric Machine Design Questions & Answers
5. By adding silicon to ferromagnetic , materials
Industrial Drives Questions & Answers
1. The .......motors, because of their inherent characteristics, are best suited for the rolling mills
Industrial Drives Questions & Answers
2. Motors preferred for rolling mill drive is
Industrial Drives Questions & Answers
3. The range of horse power of electric motor drives for rolling mills is of the order of
Industrial Drives Questions & Answers
4. For handing fragile articles in a crane
Industrial Drives Questions & Answers
5. A pole changing type squirrel cage motor used in derricks has four, eight and twenty four poles. In this the lowest speed is used for
Computation Questions & Answers
1. In a circular linked list organization, insertion of a record involves modification of
Computation Questions & Answers
2. A operator precedence parser is a
Computation Questions & Answers
3. FORTRAN is a
Computation Questions & Answers
4. Using longer identifiers in a program will necessarily lead to
Computation Questions & Answers
5. A critical region is
