🔍 Key Concepts

• Electric motor preservation when not in use for long periods • Effects of moisture and condensation on insulation resistance and windings • Purpose of space heaters or anti-condensation heaters in deck machinery motors

💭 Think About

• Which option specifically prevents damage during long idle periods rather than testing or reacting to a problem? • What is the main risk to electric motors sitting unused in a marine environment: mechanical wear, electrical shock, salt buildup, or moisture inside the motor? • Which choice reflects a continuous protective measure rather than a one-time test or preparation step?

✅ Before You Answer

• Identify which choice is aimed at prevention, not just testing or cleanup • Consider what shipboard practice is used to keep motor insulation dry when machinery is idle • Eliminate any options that could actually increase risk (for example, introducing water into electrical equipment)