CITB Electrical and Mechanical Services Flashcards
6 cards from real CITB practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 CITB Electrical and Mechanical Services flashcards as text
What is the purpose of a lockout/tagout (LOTO) procedure in construction electrical work?
Answer: To prevent accidental energization of equipment during maintenance
LOTO procedures ensure energy sources are isolated and cannot be re-energized while workers perform maintenance.
What British thermal unit (BTU) rating indicates the heating or cooling capacity of HVAC equipment?
Answer: BTU/hr
BTU per hour (BTU/hr) is the standard US measurement of heating or cooling output for HVAC equipment.
Which type of electrical conduit provides the best mechanical protection in exposed construction areas?
Answer: Rigid metal conduit (RMC)
Rigid metal conduit (RMC) offers the highest mechanical protection and is used in areas subject to physical damage.
What is the minimum ampacity required for a 20-amp branch circuit conductor under NEC rules?
Answer: 20 amps
Conductors for a 20-amp branch circuit must be rated at least 20 amps under NEC Article 210.
In plumbing, what is the function of a P-trap?
Answer: To hold a water seal preventing sewer gas entry
A P-trap maintains a water seal in the drain line that blocks sewer gases from entering the building.
Which test is performed on a new plumbing rough-in before walls are closed to verify no leaks exist?
Answer: Pressure test
A hydrostatic (water) pressure test pressurizes the system to check for leaks before walls are enclosed.