Hello,
1. In a low-voltage remote-control wiring system, the switch used is approximately the size of a standard single-pole switch, which is about one-fourth the size. So the correct answer is b. one-fourth.
2. The amount of short-circuit current from a motor is approximately equal to the current for each motor during the locked-rotor condition. So the correct answer is b. locked-rotor.
3. In a low-voltage remote-control system, the switch used is approximately the size of a standard single-pole switch, which is about one-fourth the size. So the correct answer is b. one-fourth.