COSC 325 MEP ELECTRICAL MECHANICAL EXAM ACTUAL

COSC 325 MEP ELECTRICAL & MECHANICAL EXAM (ACTUAL

QUESTIONS AND VERIFIED CORRECT ANSWERS

Answers___High-efficiency

What type of ductwork system makes it possible to keep ductwork close to building support members? - --- Answers___Trunk & Branch Ducts

What extends from the trunk to each register? - --- Answers___Branches

What kind of ductwork makes installations and retrofits much easier, especially when space is a premium? - --- Answers___Flexible ductwork

What is a disadvantage of Flexible ductwork? - --- Answers___Air pressure is lower than Rigid ductwork.

Besides easier installation, what is another advantage of Flexible ductwork? - ---Answers___Absorbs vibrations and pulsations that might cause noise.

What is a temperature-actuated electric switch that operates and controls the heating elements in a heating unit? - --- Answers___Thermostat

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What is the temperature at which the switch in a thermostat opens and closes? - ---Answers___Setpoint temperature

Where is a VFD located? - ---Answers___In the power supply between the power distribution and the fan motor.

What can a VFD do? - ---Answers___Change the fan speed from 0 rpm to maximum rpm to save energy and help ensure comfort.

What is a self-contained heating unit that is not connect to ductwork and is used a space heaters? - ---Answers___Unit heater

What kind of heater is installed in a duct and supplied with air from a remote blower device and has an air-proving limit switch? - ---Answers___Duct heater

What is an Air-proving limit switch? - ---Answers___A control device that shuts the unit off if no air is moving in the ducts.

What kind of heating unit heats by radiation only? - --- Answers___Infrared Radiant Heater

What is an Air-cooled packaged unit that is located on the roof of a building? - ---Answers___Rooftop unit (RTU)

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How many Btu's does steam carry for every pound of steam that condenses back into a liquid? - ---Answers___970 Btu

What is the steam supply system? - ---Answers___The piping and support systems that provide a path for steam flow from the boiler to the point of use.

What is the condensate return system? - ---Answers___The system used to return condensate back to the boiler after all the useful heat has been removed.

What heating system component transfers heat from hot water in a hydronic heating system to the air in building spaces? - -- -Answers___Terminal devices

Direct Drive and Belt Drive are types of what? - --- Answers___Pump drives

What is the device that is a stand-alone thermostat that can be programmed by the building occupants? - --- Answers___Programmable thermostat

What is the process of moving heat from an area where it is undesirable to an area where the heat is no objectionable? - -- -Answers___Refrigeration

What is a Refrigeration system? - ---Answers___A closed system that controls the pressure and temperature of a

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