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Electrical installation and wiring
| 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. |
| Q1 ⇒ ____ cables are used for 132 kV lines. Extra super voltage [other wrong options] [Discuss in forum] |
| Q2 ⇒ PVC stands for polyvinyl chloride [other wrong options] [Discuss in forum] |
| Q3 ⇒ In cables the charging current leads the voltage by 90° [other wrong options] [Discuss in forum] |
| Q4 ⇒ In a cable the voltage stress is maximum
at core of the conductor [other wrong options] [Discuss in forum] |
| Q5 ⇒ The insulating material should have all of the above [other wrong options] [Discuss in forum] |
| Q6 ⇒ Which of the following insulation is
used in cables ? Any of the above [other wrong options] [Discuss in forum] |
| Q7 ⇒ Conduit pipes are normally used to
protect ____ cables. unsheathed cables [other wrong options] [Discuss in forum] |
| Q8 ⇒ In the cables, the location of fault is
usually found out by comparing [other wrong options] [Discuss in forum] |
| Q9 ⇒ A certain cable has an insulation of
relative permittivity 4. If the insulation
is replaced by one of relative permittivity
2, the capacitance of the cable will
become one half [other wrong options] [Discuss in forum] |
| Q10 ⇒ Capacitance grading of cable implies use of dielectrics of different permeabilities [other wrong options] [Discuss in forum] |
| Q11 ⇒ The advantage of oil filled cables is all of the above [other wrong options] [Discuss in forum] |
| Q12 ⇒ Empire tape is varnished cambric [other wrong options] [Discuss in forum] |
| Q13 ⇒ The minimum dielectric stress in a
cable is at lead sheath [other wrong options] [Discuss in forum] |
| Q14 ⇒ In capacitance grading of cables we use
a ____ dielectric. composite [other wrong options] [Discuss in forum] |
| Q15 ⇒ If a cable of homogeneous insulation
has a maximum stress of 10 kV/mm,
then the dielectric strength of insulation
should be 10 kV/mm [other wrong options] [Discuss in forum] |
| Q16 ⇒ Underground cables are laid at sufficient
depth to minimise the effect of shocks and vibrations due to passing vehicles, etc. [other wrong options] [Discuss in forum] |
| Q17 ⇒ The disadvantage with paper as insulating
material is it is hygroscopic [other wrong options] [Discuss in forum] |
| Q18 ⇒ The thickness of the layer of insulation
on the conductor, in cables, depends
upon voltage [other wrong options] [Discuss in forum] |
| Q19 ⇒ In single core cables armouring is not
done to avoid excessive sheath losses [other wrong options] [Discuss in forum] |
| Q20 ⇒ Pressure cables are generally not used
beyond 66 kV [other wrong options] [Discuss in forum] |
| Or |