Final answer:
The suitable replacement for a 35-microfarad, 370-volt running capacitor is option b) 35-microfarad, 390-volt capacitor because it matches the required capacitance and has a higher voltage rating.
Step-by-step explanation:
The question is about determining which capacitor can replace a 35-microfarad, 370-volt running capacitor. When replacing a capacitor, the replacement should have the same capacitance and a voltage rating that is equal to or higher than the original. Among the options given:
- a) 35 microfarad, 330 volt - This capacitor has the correct capacitance but a lower voltage rating, which is not suitable.
- b) 35 microfarad, 390 volt - This capacitor has both the correct capacitance and a higher voltage rating, making it a suitable replacement.
- c) 30 microfarad, 440 volt - This capacitor has a lower capacitance and should not be used as a replacement.
- d) 40 microfarad, 370 volt - This capacitor has a higher capacitance, which also makes it unsuitable as a replacement.
Therefore, the correct answer to which of the following capacitors could be used to replace a 35-microfarad, 370-volt running capacitor is b) 35 microfarad, 390 volt.