ETC Mechanical Systems & Equipment Flashcards
6 cards from real ETC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 ETC Mechanical Systems & Equipment flashcards as text
What does HVAC stand for in mechanical engineering?
Answer: Heating, Ventilation, and Air Conditioning
HVAC refers to Heating, Ventilation, and Air Conditioning systems that control thermal comfort and indoor air quality in buildings.
What is the purpose of a pressure relief valve in a pressure vessel?
Answer: To automatically release pressure when it exceeds safe limits, preventing vessel failure
A pressure relief valve automatically opens to vent excess pressure from a vessel or system, preventing overpressure failure or explosion.
What does hydraulic head represent in fluid mechanics?
Answer: The total energy per unit weight of fluid at a given point expressed as height
Hydraulic head is the total energy per unit weight of fluid, combining pressure head, velocity head, and elevation head, expressed in units of length.
What type of pump is most commonly used for moving water in building plumbing systems?
Answer: Centrifugal pump
Centrifugal pumps are the most common type for building water systems, using a rotating impeller to add energy and move fluid.
What is the function of a heat exchanger?
Answer: To transfer thermal energy between two fluid streams without mixing them
A heat exchanger transfers heat from one fluid to another through a separating wall, enabling energy recovery, heating, or cooling without fluid mixing.
What does 'friction loss' mean in pipe system design?
Answer: Pressure drop caused by fluid friction against pipe walls and fittings as fluid flows through
Friction loss is the pressure energy lost due to viscous friction between fluid and the pipe wall and fittings, requiring pumps to overcome.