Architecture and Design Mechanical, Electrical, and Plumbing (MEP) Systems 2

Question 1

What is the standard electrical service voltage for residential buildings in the United States?

Accepted Answer

120/240V

Answer

US residential service is single-phase 120/240V, providing 120V for standard outlets and 240V for high-demand appliances.

Question 2

Which device detects small imbalances between hot and neutral current to protect against electrical shock, and is required by code near water sources?

Accepted Answer

Ground Fault Circuit Interrupter (GFCI)

Answer

GFCIs detect milliamp-level current imbalances indicating current may be flowing through a person and trip the circuit within milliseconds.

Question 3

What primary advantage does three-phase electrical distribution offer over single-phase systems in large commercial buildings?

Accepted Answer

It provides smoother, more efficient power delivery for motors and large equipment

Answer

Three-phase power delivers continuous, balanced power across all phases, making it more efficient and ideal for running motors and large commercial loads.

Question 4

What does an electrical panel's amperage rating indicate?

Accepted Answer

The maximum current the panel can safely carry continuously

Answer

The amperage rating indicates the maximum continuous electrical current the panel's main breaker and bussing can safely handle.

Question 5

Which lighting control strategy uses photosensors to automatically reduce electric light output when sufficient daylight is available?

Accepted Answer

Daylight harvesting

Answer

Daylight harvesting systems dim or switch off electric lights proportionally as daylight increases, reducing energy consumption in perimeter zones.

Architecture and Design Practice Test

Architecture and Design Practice Test

Architecture and Design Mechanical, Electrical, and Plumbing (MEP) Systems 2