Question: A cable carrying alternating current has__________?

• 1. hysteresis losses only
• 2. hysteresis and leakage losses only
• 3. hysteresis, leakage and copper losses only
• 4. hysteresis, leakage, copper and friction losses

Question: Capacitance grading of cable implies__________?

• 1. use of dielectrics of different permeabilities
• 2. grading according to capacitance of cables per km length
• 3. cables using single dielectric in different concentrations
• 4. capacitance required to be introduced at different lengths to counter the effect of inductance

Question: The advantage of cables over overhead transmission lines is___________?

• 1. easy maintenance
• 2. low cost
• 3. can be used in congested areas
• 4. can be used in high voltage circuits

Question: Is a cable is to be designed for use on 1000 kV, which insulation would you prefer ____________?

• 1. Polyvinyle chloride
• 2. Vulcanised rubber
• 3. Impregnated paper
• 4. Compressed SFe gas

Question: The insulation of the cable decreases with__________?

• 1. the increase in length of the insulation
• 2. the decrease in the length of the insulation
• 3. either A or B
• 4. none of the above

Question: The e.m.f. of an Edison cell, when fully charged, is nearly______________?

• 1. 1.4 V
• 2. 1 V
• 3. 0.9 V
• 4. 0.8 V

Question: The internal resistance of an alkali cell is nearly _________ times that of the lead-acid cell.

• 1. two
• 2. three
• 3. four
• 4. five

Question: The capacity of a lead-acid cell depends on:

• 1. rate of discharge
• 2. temperature
• 3. density of electrolyte
• 4. all above

Question: The ampere-hour efficiency of a lead acid cell is normally between_________?

• 1. 20 to 30%
• 2. 40 to 50%
• 3. 60 to 70%
• 4. 90 to 95%

Question: When the lead-acid cell is fully charged, the electrolyte assumes _______ appearance.

• 1. dull
• 2. reddish
• 3. bright
• 4. milky