CHAPTER 6 MECHANICAL AND ELECTRICAL SYSTEMS QUESTIONS AND ANSWERS
| EXAM PREP 2026/2027
The prefix "M" indicates _____. - ANS ✔✔mechanical prints
The _____ elevation is the inside elevation at the bottom of the inside flow line of a pipe. - ANS
✔✔invert
An electrical cable line with no slash marks on a plan view indicates a cable containing _____
conductors. - ANS ✔✔two
In areas prone to freezing, a(n) _____ pipe sprinkler system is required. - ANS ✔✔dry
_____ is free from impurities that could cause disease or harmful physiological effects. - ANS
✔✔Potable water
_____ valves are used where throttling of fluid flow is required. - ANS ✔✔Globe
For _____ fire protection systems, two separate events must occur for the sprinkler system to
activate. - ANS ✔✔preaction
A 25' length run of plumbing waste pipe with a 1% slope changes elevation a total of _____". -
ANS ✔✔3"
A _____ pipe circulates water from a boiler to a terminal unit. - ANS ✔✔hot water supply
| EXAM PREP 2026/2027
The prefix "M" indicates _____. - ANS ✔✔mechanical prints
The _____ elevation is the inside elevation at the bottom of the inside flow line of a pipe. - ANS
✔✔invert
An electrical cable line with no slash marks on a plan view indicates a cable containing _____
conductors. - ANS ✔✔two
In areas prone to freezing, a(n) _____ pipe sprinkler system is required. - ANS ✔✔dry
_____ is free from impurities that could cause disease or harmful physiological effects. - ANS
✔✔Potable water
_____ valves are used where throttling of fluid flow is required. - ANS ✔✔Globe
For _____ fire protection systems, two separate events must occur for the sprinkler system to
activate. - ANS ✔✔preaction
A 25' length run of plumbing waste pipe with a 1% slope changes elevation a total of _____". -
ANS ✔✔3"
A _____ pipe circulates water from a boiler to a terminal unit. - ANS ✔✔hot water supply
