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1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q41 ⇒ The purpose of using a booster is to compensate for voltage drop [other wrong options] [Discuss in forum] increase current reduce current reduce voltage drop none of the above |
Q42 ⇒ Which of the following can be used for
bus-bars ? Any of the above [other wrong options] [Discuss in forum] Tubes Rods Bars |
Q43 ⇒ Conductors for high voltage transmission
lines are suspended from towers
to increase clearance from ground [other wrong options] [Discuss in forum] reduce clearance from ground take care of extension in length during summer reduce wind and snow loads none of the above |
Q44 ⇒ The electrostatic stress in underground
cables is maximum at the conductor and minimum at the sheath [other wrong options] [Discuss in forum] zero at the conductor as well as on
the sheath same at the conductor and sheath minimum at the condactor and minimum at the sheath |
Q45 ⇒ The charging current in the cables leads the voltage by 90° [other wrong options] [Discuss in forum] leads the voltage by 180° lags the voltage by 90° lags the voltage by 180° |
Q46 ⇒ The underground system cannot be
operated above 66 kV [other wrong options] [Discuss in forum] 440 V 11 kV 33 kV |
Q47 ⇒ Which of the following is the source of
heat generation in the cables ? All of the above [other wrong options] [Discuss in forum] Dielectric losses in cable insulation IR losses in the conductor Losses in the metallic sheathings and armourings |
Q48 ⇒ The distributors for residential areas
are three-phase four wire [other wrong options] [Discuss in forum] single phase three-phase three wire none of the above |
Q49 ⇒ In transmission lines the cross-arms
are made of steel [other wrong options] [Discuss in forum] copper wood R.C.C. |
Q50 ⇒ Transmitted power remaining the
same, if supply voltage of a D.C. 2-wire
feeder is increased 100 percent, saving
in copper is 50 percent [other wrong options] [Discuss in forum] 25 percent 75 percent 100 percent |
Q51 ⇒ Which of the following materials is
used for overhead transmission lines ? Any of the above [other wrong options] [Discuss in forum] Steel cored aluminium Galvanised steel Cadmium copper |
Q52 ⇒ Skin effect is proportional to (conductor diameter)2 [other wrong options] [Discuss in forum] (conductor diameter)4 (conductor diameter)3 (conductor diameter)1/2 |
Q53 ⇒ For which of the following equipment
current rating is not necessary ? Isolators [other wrong options] [Discuss in forum] Circuit breakers Load break switch Circuit breakers and load break switches |
Q54 ⇒ For aluminium, as compared to copper,
all the following factors have higher
values except electrical conductivity [other wrong options] [Discuss in forum] specific volume co-efficient of linear expansion resistance per unit length for same cross-section |
Q55 ⇒ The frequency of voltage generated, in
case of generators, can be increased by adjusting the governor [other wrong options] [Discuss in forum] using reactors increasing the load reducing the terminal voltage none of the above |
Q56 ⇒ In transmission and distribution system
the permissible voltage variation
is ± 10 percent [other wrong options] [Discuss in forum] ± 1 percent ± 20 percent ± 30 percent none of the above |
Q57 ⇒ Which of the following has least effect
on corona ? Atmospheric temperature [other wrong options] [Discuss in forum] Number of ions Size and charge per ion Mean free path |
Q58 ⇒ On which of the following does the size
of a feeder depend ? Current carrying capacity [other wrong options] [Discuss in forum] Voltage drop Voltage Frequency |
Q59 ⇒ The limit of distance of transmission
line may be increased by the use of series capacitors and shunt reactors [other wrong options] [Discuss in forum] series resistances shunt capacitors and series reactors synchronous condensers none of the above |
Q60 ⇒ Induction regulators are used for voltage
control in primary distribution [other wrong options] [Discuss in forum] alternators secondary distribution none of the above |
Or |