Question

QUESTION 69 If you want to provide both heating and cooling all year round and maybe...

QUESTION 69

If you want to provide both heating and cooling all year round and maybe change from heating to cooling in one day throughout the building using fan coil units in each room, what type of piping system would you install?

Four-pipe

Three pipe

Two-pipe

one-pipe

1 points   

QUESTION 70

A Variable Air Volume (VAV) box installed in HVAC ductwork includes which of the following?

Valve

Air volume control damper

Filter

Fan

1 points   

QUESTION 71

Which of the following wire sizes is capable of carrying the most amount of current?

10

12

14

They can all carry the same amount of current

1 points   

QUESTION 72

What is the the type of energy present in water stored behind a hydroelectric dam?

Mechanical Energy

Kinetic Energy

Potential Energy

Nuclear Energy

1 points   

QUESTION 73

Air flow through a duct is controlled (increased/decreased) using which of the following?

Diffuser

Filter

Grill

Damper

1 points   

QUESTION 74

Which of the following units represents the flow rate of electrons?

Voltage

Inductance

Resistance

Current

1 points   

QUESTION 75

When a sprinkler head breaks in a building which of the following devices goes into alarm?

Pull station

Smoke detector

Water flow switch

Duct smoke detector

1 points   

QUESTION 76

From a controls system perspective which of the following is not true?

Significant energy savings can be had by the use of correctly designed control systems

Commissioning of controls operation of mechanical system is critical to achieve efficient system performance

Fewer than 10% of buildings have control system issues

Control systems are the "brains" of mechanical system operations

1 points   

QUESTION 77

The sizing of a roof drain is based on what factor of design?

a.
Type of pipe

b.
Height of building

c.
Area of roof being drained

d.
Type of roofing material

1 points   

QUESTION 78

Adding insulation to a wall results in ________ through the wall than before the changes.

The same heat flow rate

A lower heat flow rate

A higher heat flow rate

No heat flow through the wall

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