Question 151
Which American Wire Gauge (AWG) conductor size has the largest diameter?
Question 152
When tightening terminal screws on a receptacle, how should the conductor be wrapped around the screw?
Question 153
A motor nameplate shows full-load current of 8 A at 240 V, single-phase. If the motor is started and the breaker trips immediately, which is the best first step in troubleshooting?
Question 154
During troubleshooting in an industrial facility, an electrician finds that a VFD-fed motor will not start and the drive shows an under-voltage fault. Line measurements at the drive input are normal. Which issue is most likely inside the drive or motor circuit?
Question 155
In a control panel, a 24 V DC power supply feeds several PLC input modules and field devices. Random input faults occur when a solenoid valve is energized. Which mitigation is most effective for reducing electrical noise and voltage dips on the control power supply?
Question 156
When planning the service for a commercial building, which load is typically considered in determining the minimum service size?
Question 157
A motor starter coil is rated 120 V, but the motor will not start when the start button is pressed. Measurement shows only 80 V at the coil terminals when the button is pressed. Which is the most likely cause?
Question 158
You are reviewing a one-line diagram to lock out a feeder before working on a downstream panel. What is the best way to identify the correct disconnecting means?
Question 159
When terminating a 14 AWG copper conductor on a duplex receptacle, what is the BEST practice for stripping insulation?
Question 160
What is the primary advantage of a 'soft starter' compared to a direct-on-line starter?
Question 161
Which motor starter type provides the simplest and least expensive method of starting a 3-phase motor?
Question 162
Which type of motor starter connects the motor directly to the line voltage, providing maximum starting torque but high inrush current?
Question 163
What is the main benefit of a 'soft starter' compared to an 'across-the-line' starter?