A. steel tape
B. galvanised steel wire
C. any of the above
D. none of the above
Related Mcqs:
- 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 power cable and a communication cable are to run parallel the minimum distance between the two, to avoid interference, should be______________?
A. 2 cm
B. 10 cm
C. 50 cm
D. 400 cm - 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 - The insulating material for a cable should have__________?
A. low cost
B. high dielectric strength
C. high mechanical strength
D. all of the above - Which of the following protects a cable against mechanical injury___________?
A. Bedding
B. Sheath
C. Armouring
D. None of the above - In a cable immediately above metallic sheath ______ is provided
A. earthing connection
B. bedding
C. armouring
D. none of the above - In case of three core flexible cable the colour of the neutral is_________?
A. blue
B. black
C. brown
D. none of the above - A cable carrying alternating current has__________?
A. hysteresis losses only
B. hysteresis and leakage losses only
C. hysteresis, leakage and copper losses only
D. hysteresis, leakage, copper and friction losses - 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 - Capacitance grading of cable implies__________?
A. use of dielectrics of different permeabilities
B. grading according to capacitance of cables per km length
C. cables using single dielectric in different concentrations
D. capacitance required to be introduced at different lengths to counter the effect of inductance
E. none of the above
