ETC ETC Mechanical Systems & Equipment

Question 1

What does HVAC stand for in mechanical engineering?

Accepted Answer

Heating, Ventilation, and Air Conditioning

Answer

HVAC refers to Heating, Ventilation, and Air Conditioning systems that control thermal comfort and indoor air quality in buildings.

Question 2

What is the purpose of a pressure relief valve in a pressure vessel?

Accepted Answer

To automatically release pressure when it exceeds safe limits, preventing vessel failure

Answer

A pressure relief valve automatically opens to vent excess pressure from a vessel or system, preventing overpressure failure or explosion.

Question 3

What does hydraulic head represent in fluid mechanics?

Accepted Answer

The total energy per unit weight of fluid at a given point expressed as height

Answer

Hydraulic head is the total energy per unit weight of fluid, combining pressure head, velocity head, and elevation head, expressed in units of length.

Question 4

What type of pump is most commonly used for moving water in building plumbing systems?

Accepted Answer

Centrifugal pump

Answer

Centrifugal pumps are the most common type for building water systems, using a rotating impeller to add energy and move fluid.

Question 5

What is the function of a heat exchanger?

Accepted Answer

To transfer thermal energy between two fluid streams without mixing them

Answer

A heat exchanger transfers heat from one fluid to another through a separating wall, enabling energy recovery, heating, or cooling without fluid mixing.

(ETC) Engineering Technician Certification Practice Test

(ETC) Engineering Technician Certification Practice Test

ETC ETC Mechanical Systems & Equipment