Description : What are the different factors for the selection of electrical drives?
Last Answer : Steady state operation requirements Transient operation requirements Requirements related to the source Capital and running cost, maintenance needs, life Space and weight restrictions Environment and location Reliability
Description : Transmission efficiency of transmission line increases with the: a) Decrease in power factor and voltage b) Increases in power factor and voltage c) Increase in power factor and decrease in voltage d) Increase in the voltage but decrease in the power factor
Last Answer : Ans: B
Description : A three-phase electrical system is equipped with ground detecting lamps. If one of the lamp goes dark and the other two burn normally before and after the test switch is operated, this indicates _______________. ... of the three phases D. the voltage to the dark lamp is less than that of the system
Last Answer : Answer: A
Description : In a three-phase electrical system, three ground detecting lamps are provided. If all three lamps REMAIN at half-brilliance when the ground detecting test switch is operated, ______________. A. there is a ... must be replaced C. there are no grounds present D. the light bulbs are of improper voltage
Last Answer : Answer: C
Description : To remove an alternator operating in parallel with another unit from the main electrical bus, you must FIRST _________. A. adjust the power factor on both units B. set the desired voltage on ... C. open the circuit breaker on the outgoing alternator D. remove the load from the outgoing alternator
Last Answer : Answer: D
Description : A wattmeter is used to determine ____________. A. the power being consumed by electrical equipment B. partial circuit resistance C. current flowing in a circuit D. voltage existing between two points in a circuit
Description : A galvanometer is an instrument used to measure ___________. A. thickness of galvanized metal B. resistance of electrical wiring insulation C. very small amounts of current or voltage D. quantity of galvans in an electric circuit
Description : When shipboard electrical distribution circuits are connected in parallel, additional parallel circuits will cause the total circuit resistance to _____________. A. increase, causing a drop in the line current B ... an increase in the line voltage D. decrease, causing an increase in the line current
Description : Electrical insulation is classed by the _____________. A. International Association of Electrical Manufacturers B. approximate operating voltage and current expected C. U.S. Coast Guard D. temperature stability of the manufacturing material(s)
Description : A transformer in an electric circuit serves to ____________. A. generate its own electrical power B. transform electrical energy into mechanical energy C. increase or decrease circuit voltage as required D. convert AC current to DC current
Description : The electrical supply applied to the anodes shown in the illustration is _____________. EL-0090 A. low voltage, high current DC B. low voltage, high current AC C. high voltage, low current DC D. high voltage, low current AC
Description : Which of the electrical properties listed will always be the same for each component in a parallel circuit? A. Impedance B. Current C. Resistance D. Voltage
Description : A switchboard for an AC electrical system requires the use of which of the following devices? A. Frequency meter. B. Ohmmeter. C. Induction voltage regulator. D. Current transformer governor.
Description : Regarding an AC generator connected to the main electrical bus; as the electric load and power factor vary, a corresponding change is reflected in the generator armature reaction. These changes in ... . governor speed droop setting B. voltage regulator C. balance coil D. phase-balance relay
Last Answer : Answer: B
Description : What are the advantages of high voltage transmission?
Last Answer : a. Saving in conductor materials. b. Low power loss (I2 R) of transmission lines due to decrease in current. c. Better efficiency of line due to fewer losses. d. Better voltage ... section of conductor distance between the poles increases and the cost decreases and the labour cost also decreases.
Description : If sending end voltage is Vs at no-load in a transmission line then receiving end voltage is if ABCD parameters of line is given a) Vs b) Vs/A c) 0 d) Infinity
Last Answer : Ans: Vs/A
Description : The voltage at the two ends of a transmission line are 132 KV and its reactance is 40 ohm. The Capacity of the line is (A) 435.6 MW (B) 217.8 MW (C) 251.5 MW (D) 500 MW
Last Answer : (A) 435.6 MW
Description : In order to reduce the harmful effects of harmonics on the A.C. side of a high voltage D.C. transmission system ______are provided. (A) synchronous condensers (B) shunt capacitors (C) shunt filters (D) static compensators
Last Answer : Ans: C Xc= 1/ ωc
Description : The size of the feeder is determined primarily by (A) the current it is required to carry. (B) the percent variation of voltage in the feeder. (C) the voltage across the feeder. (D) the distance of transmission.
Last Answer : Ans: A Size of conductor depends upon amount of current flow.
Description : As the voltage of transmission increases, the volume of conductor (A) increases. (B) does not change. (C) decreases. (D) increases proportionately.
Last Answer : Ans: C Decreases due to skin effect.
Description : When considering fraud risk factors relating to management's characteristics, which of the following is least likely to indicate a risk of possible misstatement due to fraud? a. ... portion of management's compensation represented by bonuses based upon achieving unduly aggressive operating results.
Last Answer : Use of unusually conservative accounting practices.
Description : Explain the criteria for selection of construction materials for different civil engineering Structures on basis of their strength and durability
Last Answer : The material must be selected for their ability to support the loads imposed by the building over the whole life of the building. An appropriate structural system and correct selection of ... of the building. The construction material should have sufficient strength to carry the prescribed load.
Description : Describe the factors for selection of construction materials on the basis of strength.
Last Answer : Material must be selected for their ability to support the loads imposed by the building over the whole life of the building. An appropriate structural system and correct selection of ... replacement requirement, but the material should also be appropriate for expected life of the building.
Description : Explain the selection of lubricating oil on the basis of viscosity and service rating.
Last Answer : Selection of Lubricating Oil: 1. On the basis of Viscosity : Lubricating Oils Classify in terms of Viscosity at -180C or in cold climates. a) SAE 5W b) SAE 10W c) SAE ... stability & anti- scuff Protection c) SC, SD & SC: Meets automotive manufactures specifications.
Description : If you select a monitor in your class, which criteria will be followed by you in this selection? Options: A) On the basis of democratic(Through election) B) On the basis of physical make-up C) On the basis of superiority in the class D) On the basis of personal preference
Last Answer : A) On the basis of democratic(Through election)
Description : Which of the listed conditions occur when selection is made for 'third point hoist' on the winch shown in the illustration? EL-0102 A. Master switch contacts '5', '6', '7', '8', and '9' close. B. Contactors '2M', ' ... ' and '2A' drop out. D. Master switch contacts '3','4', '6', '8', and '9' close.
Description : The 'function generator' of the control circuit illustrated _______________. EL-0095 A. can be programmed to produce a non-linear output for a linear input depending on operating conditions B. is used for ... which or how many engines are needed for a required vessel speed D. all of the above
Description : What is the condition to be satisfied in the selection of L and C in a series inverter?
Last Answer : R2< 4LC
Description : What are the factors affecting the selection of Maximum flux density?
Last Answer : 1. Net core weight: Higher the flux density lesser net weight of core. 2.Saving in copper:Higher the flux density lesser mean turn of windings. 3.Overall economy: Higher the flux ... High Flux density results in high losses and hence efficiency decreases 8.Hence high temperature rise and noise
Description : How selection of cooling fluid in GT done?
Last Answer : a) There are 5 factors are there. b) Density c) Coefficient of thermal expansion d) Viscosity e) Specific heat f) Thermal conductivity.
Description : What are the points to be considered for MCB (miniature circuit breaker selection)?
Last Answer : I(L)x1.25=I(MAX) maximum current. Mcb specification is done on maximum current flow in circuit.
Description : In Gauss Seidel method the following factors are influenced for operation a) Acceleration factor b) Selection of slack buss c) Both d) None
Last Answer : Ans: Selection of slack buss*
Description : A transmission shaft subjected to pure bending moment should be designed on the basis of (A) Maximum principal stress theory (B) Maximum shear stress theory (C) Distortion energy theory (D) Goodman or Soderberg diagrams
Last Answer : (A) Maximum principal stress theory
Description : When a CD (Compact Disc used in audio and Video system) is seen in sunlight, rainbow like colours are seen. This can be explained on the basis of phenomenon of 1) reflection and diffraction 2) reflection and transmission 3) diffraction and transmission 4) refraction, diffraction and transmission
Last Answer : 4) refraction, diffraction and transmission
Description : On What Basis A Transmission Shaft Subjected To Bending Loads Must Be Designed?
Last Answer : Maximum shear stress theory.
Description : A transmission shaft subjected to bending loads must be designed on the basis of (a) maximum normal stress theory (b) maximum shear stress theory (c) maximum normal stress and maximum shear stress theories (d) fatigue strength
Last Answer : (a) maximum normal stress theory
Description : The basis of the technique of chromatography for separating components of a mixture is? A. the differing movement of particles of different mass in an electrical field B. the interaction of the ... infrared radiation by the components. D. the deflection of charged particles in a magnetic field.
Last Answer : the interaction of the components with a stationary and a mobile phases
Description : Compare LAN, WAN and MAN on the basis of following point: 1) Geographical area covered 2) Communication Medium used 3) Rate of data transmission 4) Example / Application
Last Answer : Comparison LAN WAN MAN Geographical area covered Covers small geographical area.(up to 1km.) Covers large locality and connects countries together. ( Area above 100km) Covers ... School, Hospital. Internet/ Country, Continent. Cable TV network / Small towns, City.
Description : What is the difference between electrical transmission and chemical transmission? -Biology
Last Answer : answer:
Description : Copper wires are generally used for electrical power transmission instead of iron wire because (1) copper is cheaper than iron (2) copper is lighter than iron (3) copper is a better conductor of electricity than iron (4) copper can take higher power than iron
Last Answer : (3) copper is a better conductor of electricity than iron Explanation: Copper is generally preferred for electrical power transmission instead of iron because of its high electrical conductivity and low resistivity.
Description : Why is the physical length of a coaxial cable transmission line shorter than its electrical length? A. Skin effect is less pronounced in the coaxial cable B. RF energy moves slower along the ... higher in the parallel feed line D. The characteristic impedance is higher in the parallel feed line
Last Answer : B. RF energy moves slower along the coaxial cable
Description : In ATM, the _____ layer defines thetransmission medium,bit transmission,encoding, and electrical-to-optical transformation. A) physical B) ATM layer C) AAL D) none of the above
Last Answer : physical
Description : The physical layer provides __________ a. mechanical specifications of electrical connectors and cables b. electrical specification of transmission line signal level c. specification for IR over optical fiber d. all of the mentioned
Last Answer : d. all of the mentioned
Description : Which transmission media provides the highest transmission speed in a network? a. coaxial cable b. twisted pair cable c. optical fiber d. electrical cable
Last Answer : c. optical fiber
Description : The physical layer provides __________ A. mechanical specifications of electrical connectors and cables B. electrical specification of transmission line signal level C. specification for IR over optical fiber D. all of the mentioned
Last Answer : D. all of the mentioned
Description : What specifications does physical layer provides __________. A. mechanical specifications of electrical connectors and cables B. electrical specification of transmission line signal level C. specification for IR over optical fiber D. all of the mentioned
Description : What kind of transmission medium is most appropriate to carry data in a computer network that is exposed to electrical interferences? a) Unshielded twisted pair b) Optical fiber c) Coaxial cable d) Microwave
Last Answer : b) Optical fiber
Description : The physical layer provides __________ a) mechanical specifications of electrical connectors and cables b) electrical specification of transmission line signal level c) specification for IR over optical fiber d) all of the mentioned
Last Answer : d) all of the mentioned
Description : Which transmission media provides the highest transmission speed in a network? a) coaxial cable b) twisted pair cable c) optical fiber d) electrical cable
Last Answer : c) optical fiber
Description : Which of the following materials is not used for transmission and distribution of electrical power ? (a) Copper (b) Aluminium (c) Steel (d) Tungsten
Last Answer : (d) Tungsten