A. reactive power
B. power factor
C. voltage
D. current carrying capacity
Related Mcqs:
- Which of the following insulation is used in cables ?
A. Varnished cambric
B. Rubber
C. Paper
D. Any of the above - 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_____________?
A. one half
B. double
C. four times
D. none of the above - If a cable of homogeneous insulation has a maximum stress of 10 kV/mm, then the dielectric strength of insulation should be_______________?
A. 5 kV/mm
B. 10 kV/mm
A. 15 kV/mm
D. 30 kV/mm - Rubber is most commonly used insulation in cables
A. Yes
B. No - Copper as conductor for cables is used as________?
A. annealed
B. hardened and tempered
C. hard drawn
D. alloy with chromium - The thickness of metallic shielding on cables is usually_______________?
A. 0.04 mm
B. 0.2 to 0.4 mm
E. 3 to 5 mm
D. 40 to 60 mm - In single core cables armouring is not done to________?
A. avoid excessive sheath losses
B. make it flexible
C. either of the above
D. none of the above - In cables the charging current__________?
A. lags the voltage by 90°
B. leads the voltage by 90°
C. lags the voltage by 180°
D. leads the voltage by 180° - In congested areas where excavation is expensive and inconvenient ‘draw in system’ of laying of underground cables is often adopted
A. Yes
B. No - Underground cables are laid at sufficient depth___________?
A. to minimise temperature stresses
B. to avoid being unearthed easily due to removal of soil
C. to minimize the effect of shocks and vibrations due to gassing vehicles, etc
D. for all of the above reasons
