Question: Factors on which soil resistance depends_______________?

• 1. depth of the electrode
• 2. moisture
• 3. Nacl
• 4. all the above

Question: Generally grounding is provided for:

• 1. only for the safety of the equipment
• 2. only for the safety of the operating personnel
• 3. both (A) and (B)
• 4. none of the above

Question: The size of the earth or ground wire is based on the______________?

• 1. maximum fault current carrying through the ground wire
• 2. rated current carrying capacity of the service line
• 3. depends on the soil resistance
• 4. both (A) and (C)

Question: There is a total of 800 mA of current into four parallel resistors. The currents through three of the resistors are 40 mA, 70 mA, and 200 mA. The current through the fourth resistor is______________?

• 1. 490 mA
• 2. 800 mA
• 3. 310 mA
• 4. 0 A

Question: If one of the resistors in a parallel circuit is removed, the total resistance_____________?

• 1. decreases
• 2. increases
• 3. remains the same
• 4. doubles

Question: The following currents are measured in the same direction in a three-branch parallel circuit: 200 mA, 340 mA, and 700 mA. The value of the current into the junction of these branches is____________?

• 1. 200 mA
• 2. 540 mA
• 3. 1.24 A
• 4. 900 mA

Question: Four resistors are connected in parallel. Fifteen mA flows through resistor R. If the second resistor is 2R, the third resistor 3R, and the fourth resistor 4R, the total current in the circuit is______________?

• 1. 60 mA
• 2. 15 mA
• 3. 135 mA
• 4. 31.25 mA

Question: Six resistors are in parallel. The two lowest-value resistors are both 1.2 kΩ. The total resistance______________?

• 1. is less than 6 kΩ
• 2. is greater than 1.2 kΩ
• 3. is less than 1.2 kΩ
• 4. is less than 600 Ω

Question: Six resistors are in parallel. The two lowest-value resistors are both 1.2 kΩ. The total resistance_____________?

• 1. is less than 6 kΩ
• 2. is greater than 1.2 kΩ
• 3. is less than 1.2 kΩ
• 4. is less than 600 Ω

Question: The following resistors are in parallel across a voltage source: 220Ω , 470Ω , and 560Ω . The resistor with the least current is______________?

• 1. 220 Ω
• 2. 470 Ω
• 3. 560 Ω
• 4. impossible to determine without knowing the voltage