Most three-phase induction motors used for...

Question 1 / 270705eccefa4bacbc34ba4d48338

Question 1 of 270705eccefa4bacbc34ba4d48338

Most three-phase induction motors used for driving engine room auxiliaries are started by what means?

Question 1 of 27070

Most three-phase induction motors used for driving engine room auxiliaries are started by what means?

🔍 Key Concepts

• Differences between across-the-line starting and reduced-voltage starting for three‑phase induction motors • Typical size and duty of engine room auxiliary motors on ships • Effects of motor starting methods on starting current and starting torque

💭 Think About

• Think about whether most engine room auxiliary motors are relatively small/medium or very large, and how that affects the acceptable inrush (starting) current. • Consider which starting method is the simplest and most common for standard three-phase induction motors when power system strength is adequate. • Ask yourself which methods listed are specifically designed to reduce starting voltage/current, and whether that is always necessary for auxiliaries.

✅ Before You Answer

• Identify which choice represents direct connection to full line voltage with no intermediate impedance. • Identify which options (resistor, impedance, reactor) are all forms of reduced-voltage starting that limit inrush current. • Match the most commonly used method for general-purpose shipboard auxiliaries, not for very large, high-power propulsion motors.

Question 1 of 27070

Most three-phase induction motors used for driving engine room auxiliaries are started by what means?

resistor starters

across-the-line starters

impedance starters

reactor starters

Question 1 / 270705eccefa4bacbc34ba4d48338

Question 1 of 270705eccefa4bacbc34ba4d48338

Most three-phase induction motors used for driving engine room auxiliaries are started by what means?

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Question 1 of 27070

Most three-phase induction motors used for driving engine room auxiliaries are started by what means?