Polyethylene has very poor dielectric and ageing properties.

Related MCQs

• If a cable of homogeneous insulation has a maximum stress of 10 kV/mm, then the dielectric strength of insulation should be
• The minimum dielectric stress in a cable is at
• Dielectric strength of rubber is around
• In capacitance grading of cables we use a ______ dielectric.
• In capacitance grading a homogeneous dielectric is used.
• Two generators A and B have 6-poles each. Generator A has wave wound armature while generator B has lap wound armature. The ratio of the induced e.m.f. is generator A and B will be
• A D.C. welding generator has
• A shunt generator running at 1000 r.p.m. has generated e.m.f. as 200 V. If the speed increases to 1200 r.p.m., the generated e.m.f. will be nearly
• 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 cable carrying alternating current has