Name four common plumbing fixtures in an RV?

The correct choice identifies four common plumbing fixtures found in RVs: tubs, showers, sinks, and toilets.

In an RV, efficient use of space is critical, and plumbing fixtures are designed to be compact while still functional. Showers are essential for personal hygiene, and some RVs also include bathtubs, which serve a similar purpose but may take up more space. Sinks are found in kitchens and bathrooms, providing users with access to water for cooking and cleanliness. Toilets are indispensable for waste management and sanitation.

The other choices include items that are not typically categorized as plumbing fixtures. For example, refrigerators and microwaves are considered appliances, not plumbing fixtures. Dishwashers may be present in larger RVs but are not common. Similarly, dryers are not a standard part of RV plumbing systems, typically being found in residential settings rather than recreational vehicles. This careful selection reflects what RVs commonly incorporate in their plumbing designs, emphasizing their practicality and limited space considerations.