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A compressed-air distribution system has one section that frequently has low pressure when demand for compressed air is high. How can you resolve the problem without increasing energy consumption?

A.

Raise the supply air pressure

B.

Install a receiver tank near the remote load experiencing low pressure

C.

Decrease the distribution pipe size to the remote load experiencing low pressure

D.

Answers B and C

A fully-loaded heat pump unit delivers 36-kW thermal heating with a power draw of 12-kW electric. What is the coefficient of performance (COP) at full load?

A.

2.0

B.

3.0

C.

4.0

D.

5.0

E.

6.0

What is the definition of lamp life for a fluorescent lamp?

A.

The time at which lamps begin to fail

B.

The time at which 50% of a large sample of lamps have failed

C.

The time at which 70% of a large sample of lamps have failed

D.

The time at which lumen output has reduced by 50%

E.

The time at which lumen output has reduced to 70% of the initial light output

A 1OO-kW packaged engine-generate combined heat and power (CHP) system has the specifications listed below. The CHP equipment operates fully loaded for 8.000 h/yr. What isthe annual fuel cost for the ChP equipment?

CMP equipment specifications: Electrical output 100kw Electrical efficiency: 25% Thermal recovery efficiency: 50*6 Total CMP efficiency: 75%

Additional information: Fuel cost: S3.S0/GJ Electricity cost S0.06/kWh Previous water heating efficiency: 8046 Mot water usage: 75,700 liters/day (21 *C temperature rise)

[The question from the previous image, which was about calculating the annual cost of heat loss through a wall, but had a discrepancy between the calculated cost and the provided answer choices]

A.

$28,900/yr

B.

$32,668/yr

C.

$43,776/yr

D.

$52,222/yr

E.

$58,300/yr

A facility replaces a natural gas heating system rated at 10,000 kJ/h and 80% efficiency with an electric heat pump rated at 10,000 kJ/h and a coefficient of performance (COP) of 2.3. Will this project also reduce the annual energy utilization index (EUI) for the facility?

A.

Yes

B.

No

A 7 bar (gauge pressure) compressed air system has 5 leaks that are 3 mm in diameter and 3 leaks that are 6 mm in diameter. The compressed-air system is pressurized 8,760 hours per year. Electricity cost is $0.10/kWh. What is the annual cost of the leaks in the compressed air system?

A.

$18,150/yr

B.

$25,220/yr

C.

$30,910/yr

D.

$48,480/yr

E.

$56,500/yr

According to the institute of Electrical and Electronic Engineers (IEEE) standard 519. "Recommended Practices and Requirements for Harmonic Control in Electrical Power Systems." the maximum total harmonic distortion (THD) for general low voltage systems less than 600 votts) should be:

SELECT THE CORRECT ANSWER

A.

Less than 20%

B.

Less than 10%

C.

Less than 5%

D.

Less than 1%

E.

Greater than 1%

What type of heat transfer is reduced by adding insulation to the inside surface of a wall?

A.

Convection

B.

Conduction

C.

Radiation

When should commissioning be included in the design and construction of a facility?

A.

When the planning process begins

B.

When the design is finalized

C.

When installation of the energy systems begins

D.

When construction is finalized

E.

When the occupancy permit is accepted