A system of foam-producing equipment that is moved by hand is a _____.

A system of foam-producing equipment that is moved by hand is a _____.

• A. Mobile system
• B. Portable system
• C. Fixed system
• D. Temporary system

Answer: (D)

The main idea is how foam-proportioning equipment is classified by permanence and how it’s deployed. If the foam-producing gear is moved by hand, it isn’t permanently fixed in place and isn’t a designed-for-easy-on-the-job relocation unit. That points to a temporary setup—installed for a specific task or event and then removed when done. A fixed system is permanently installed, which isn’t the case here. A mobile system is built to move readily, typically with wheels or some means of transport as part of its normal operation, not just carried by hand. A portable system is designed to be carried or moved with ease, but the emphasis in this scenario is on its temporary, field-set nature rather than a routinely carried unit. Therefore, the situation best fits a temporary system.

The main idea is how foam-proportioning equipment is classified by permanence and how it’s deployed. If the foam-producing gear is moved by hand, it isn’t permanently fixed in place and isn’t a designed-for-easy-on-the-job relocation unit. That points to a temporary setup—installed for a specific task or event and then removed when done.

A fixed system is permanently installed, which isn’t the case here. A mobile system is built to move readily, typically with wheels or some means of transport as part of its normal operation, not just carried by hand. A portable system is designed to be carried or moved with ease, but the emphasis in this scenario is on its temporary, field-set nature rather than a routinely carried unit. Therefore, the situation best fits a temporary system.