Which of the following is a sign that the engine might be overheating?

• A. A sudden drop in fuel efficiency
• B. A rising temperature gauge and steam from the hood
• C. A smooth idling sound
• D. A steady speed while driving

Answer: (B)

The indication that the engine might be overheating is the combination of a rising temperature gauge and steam from the hood. The temperature gauge provides crucial feedback on the engine's operating temperature; if it rises significantly beyond the normal range, it suggests that the engine is running hotter than it should. Additionally, steam from under the hood is a clear visual signal that the coolant may be boiling, which typically occurs when the engine is overheating.

Recognizing these signs is essential for preventing engine damage or failure. Addressing an overheating engine promptly helps avoid severe issues like a blown head gasket or warped engine components, highlighting the importance of being attentive to these indicators. Other choices, such as a sudden drop in fuel efficiency, a smooth idling sound, and a steady speed while driving, do not specifically indicate engine overheating. Instead, they hint at different mechanical or performance issues that would require further investigation but are not direct signs of an overheating engine.