Question 29

The slope of the disposal pipe must be level.

When installing a septic tank, it is essential that the slope of the disposal pipe is level to ensure proper drainage and functioning of the system.

A) the slope of the disposal pipe MUST be

This option is incomplete and does not provide a specific requirement regarding the slope of the disposal pipe, making it an insufficient answer for the question.

B) level

This option is correct as the disposal pipe must be installed level to avoid issues with drainage and to ensure that sewage flows properly through the system without causing backups or blockages.

C) no greater than 5 degrees

While a slight slope can be acceptable in certain contexts, a slope no greater than 5 degrees is not the requirement for the installation of a septic tank's disposal pipe. This does not fulfill the need for a level installation, which is critical.

D) no greater than 10 degrees

Similar to option C, a slope no greater than 10 degrees does not meet the requirement that the disposal pipe must be level. Excessive slope can lead to inefficient drainage and other potential issues.

E) no greater than 15 degrees

This option is also incorrect as it suggests a slope that is too steep for a septic tank disposal pipe. A level installation is necessary to maintain optimal functioning of the system.

Conclusion

The requirement for the slope of the disposal pipe to be level is crucial for the effective operation of a septic system. All other options either provide incomplete information or suggest slopes that could lead to operational problems, confirming that option B is the only correct choice.