Final answer:
option a,Fixtures having concealed slip-joint connections require the use of gaskets to create a watertight seal.
Step-by-step explanation:
Fixtures that have concealed slip-joint connections require the use of gaskets. Slip-joint connections involve the use of two mating pieces, one sliding into the other. Concealed slip-joint connections are commonly used in plumbing for fixtures such as sinks or tubs, where the connection is hidden behind a wall or under a countertop.
The purpose of gaskets in slip-joint connections is to create a watertight seal between the two mating pieces. They prevent leaks and ensure that no water escapes through the connection.
Locknuts are also used in plumbing, but they are not specifically related to slip-joint connections. Locknuts are typically used to secure pipes or other fittings and prevent them from loosening over time.
The student has asked about what should be provided for fixtures that have concealed slip-joint connections. The correct answer is A. Gaskets. Gaskets are used to ensure a tight seal in plumbing fixtures with concealed slip-joint connections, preventing leaks and helping in maintaining the integrity of the plumbing system. Unlike adhesives and welds, gaskets allow for some movement within the plumbing joint due to thermal expansion and contraction, and unlike locknuts, they are specifically designed to seal rather than primarily to secure components in place. Therefore, gaskets are the appropriate choice for this application in plumbing systems.