ETC ETC Mechanical Systems & Equipment

Question 1

What does HVAC stand for in mechanical engineering?

Accepted Answer

Heating, Ventilation, and Air Conditioning

Answer

High Voltage Automated Controls

Answer

Hydraulic Valve and Actuator Circuit

Answer

Horizontal Vent and Cooling Assembly

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

To control the flow rate of fluid through the system

Answer

To measure the operating pressure in the system

Answer

To reduce incoming supply pressure to operating pressure

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

The physical height of a pump above the fluid source

Answer

The diameter of a hydraulic cylinder piston

Answer

The pressure drop across a hydraulic filter

Question 4

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

Accepted Answer

Centrifugal pump

Answer

Positive displacement pump

Answer

Peristaltic pump

Answer

Gear pump

Question 5

What is the function of a heat exchanger?

Accepted Answer

To transfer thermal energy between two fluid streams without mixing them

Answer

To convert electrical energy into heat for a building

Answer

To measure temperature differential in an HVAC system

Answer

To store thermal energy for later use

Question 6

What does 'friction loss' mean in pipe system design?

Accepted Answer

Pressure drop caused by fluid friction against pipe walls and fittings as fluid flows through

Answer

Energy lost due to mechanical wear on pump impellers

Answer

The force required to overcome static friction to start pump rotation

Answer

Heat generated by compressor friction in a chiller