MEEN 406 Exam 1

What level of detail would an ASHRAE Level 2 Energy Audit include? (check all that apply) - Detailed building energy simulation - Break-down of all energy end uses - Specific implementation cost and and savings analysis for a broad range of energy efficiency measures - Specific evaluation of the impact of proposed energy efficiency measures on building/plant operations - Rough cost-savings calculations of no-cost or low-cost energy efficiency measures - Investment-grade, detailed financial analysis of energy efficiency measures

- Break-down of all energy end uses - Specific implementation cost and and savings analysis for a broad range of energy efficiency measures - Specific evaluation of the impact of proposed energy efficiency measures on building/plant operations

The majority of the natural gas used in the United States is produced in which two countries/areas? - Africa - Canada - South America - Mexico - Russia - China - Middle East - United States

- Canada - United States

Which of the following are inappropriate uses of compressed air? (check all that apply) - Cooling of personnel - Pneumatic Control Valves - Conveying materials - Cleaning of equipment - Pneumatic Hand Tools - Aspirating - Vacuum generation

- Cooling of personnel - Conveying materials - Cleaning of equipment - Aspirating - Vacuum generation

Which of the following parts of the electrical utility industry has been deregulated in Texas? (check all that apply) - Generation - Transmission and Distribution - Retail Electric Providers (i.e. sales to end-user)

- Generation - Retail Electric Providers (i.e. sales to end-user)

What equipment typically causes low power factor? (check all that apply) - LED Lights - Induction Heating - Magnetic Lighting Ballasts - Sintering Oven - Paint Booth - Electric Motors

- Induction Heating - Magnetic Lighting Ballasts - Electric Motors

What information is normally included on the motor nameplate? (check all that apply) - Temperature Rating - Service Factor - Nominal Efficiency - Enclosure Type - Electrical Power Requirements - Estimated Motor Lifetime - Horsepower - Power Factor - VFD Compatability

- Temperature Rating - Service Factor - Nominal Efficiency - Enclosure Type - Electrical Power Requirements - Horsepower - Power Factor

If a 400W Metal Halide is to be replaced by T5 fluorescent bulbs, what should be included in the replacement costs? (check all that apply) - The cost of a replacement fixture. - The labor cost to change the lamp only. - The labor cost to change the lamp and fixture. - The cost of the replacement lamps.

- The cost of a replacement fixture. - The labor cost to change the lamp and fixture. - The cost of the replacement lamps.

What should be considered when calculating the payback period of installing occupancy based lighting controls? (check all that apply) - The percent time the area is occupied. - The number and type of lights in the area. - The total operational hours of the facility. - The number of occupancy sensors required to cover the area. - The capital cost and labor costs of installing the occupancy sensors.

- The percent time the area is occupied. - The number and type of lights in the area. - The total operational hours of the facility. - The number of occupancy sensors required to cover the area. - The capital cost and labor costs of installing the occupancy sensors.

Which of the following electrical utility charges are based on electrical demand? (check all that apply) - Energy Charge - Fuel Charges - Transmission System Charge - System Benefit Fund - Distribution Charge

- Transmission System Charge - Distribution Charge

What are possible uses of the waste heat from air compressors? (check all that apply) - water heating - steam generation - steam turbine for electricity generation - space heating

- water heating - space heating

A typical ballast factor for a T8 lamp with an electronic ballast is:

Between 0.89 and 0.91

What is the minimum desired level of Power Factor for most locations served by ERCOT?

Between 0.949 and 0.951

A typical ballast factor for High Pressure Sodium lamps is:

Between 1.24 and 1.26

Industrial manufacturers typically require a simple payback period less than _____ years to implement an energy efficiency project?

Between 1.9 and 2.1

It is common practice for air compressors to utilize motors that have a _____% continuous service factor?

Between 14.9 and 15.1

What is the most common type of air dryer for compressed air systems? a. Refrigerant Dryer b. Regenerative Dryer c. Membrane Dryer

a. Refrigerant Dryer

Determining the actual Load Factor of a motor requires measurements to be taken in both the load and unloaded condition. a. True B. False

a. True

Electric motors are a primary source of poor power factor in most industrial facilities. a. True B. False

a. True

Energy efficient (notched) belts are more expensive than standard V-belts. a. True B. False

a. True

If the compressed air storage tank is located after the air dryer, water and moisture will not collect at the bottom of the receiver tank. a. True B. False

b. False

For air compressors, would you expect the actual full-load horsepower to be higher, or lower, than the motor nameplate horsepower? a. Lower b. Higher

b. Higher

Increasing the efficiency of a motor (e.g. by using synthetic lubricants) reduces energy usage. If the motor operates with a duty factor of 10%, should the estimated cost savings include both consumption savings and peak demand savings? a. Yes b. No

b. No

When calculating cost savings due to the installation of occupancy sensors to control the lighting, should you include savings due to lower electrical demand? a. Yes b. No

b. No

What results in the greater net energy savings, a 10% increase in compressor efficiency, or a 10% increase in the efficiency of pneumatic tools? a. Air compressor b. Pneumatic Tools

b. Pneumatic Tools

Which location of power factor correction (i.e. capacitors) will reduce the current load in the facility wiring? a. Power Factor correction installed at the main power motor b. Power Factor correction installed near individual equipment

b. Power Factor correction installed near individual equipment

Which of the following instruments should be used to measure the temperature of a pipe to calculate the energy lost due to lack of insulation? a. Infrared Camera b. Thermocouple Probe c. Ultrasonic Sensor d. Ballast Discriminator

b. Thermocouple Probe

The majority of electrical energy entering a compressor is: a. used to increase the air density b. converted to heat c. used to overcome friction d. used to increase the velocity of the air

b. converted to heat

When replacing a lamp with a different technology, the energy engineer should select a replacement lamp(s) with approximately the same total value of _______ a. ballast factor b. lumens c. efficacy d. watts e. lifetime

b. lumens

Which direction should a light level meter be pointed in order to determine if there is sufficient light in a warehouse? a. Downwards, toward the work area b. Upwards, toward the light fixture c. Horizontally

c. Horizontally

Under which level of ASHRAE Energy Audit would the following task (at the specified level of detail) be included? DETAILED BUILDING ENERGY SIMULATION a. Level 1 Audit b. Preliminary Energy-use Analysis c. Level 3 Audit d. Level 2 Audit

c. Level 3 Audit

Natural gas in primarily composed of which hydrocarbon? a. Pentene b. Butane c. Methane d. Sugar e. Propane f. Ethane

c. Methane

When implementing a preventative maintenance program for electric motors, which of the following effects results in the greatest cost savings? a. Reduced energy use b. Reduced motor repair costs c. Reduced production downtime

c. Reduced production downtime

What type of fluorescent bulb is most likely to use a magnetic ballast? a. T8 b. LED c. T12 d. T5

c. T12

If two of the ten exterior lamps are on during daylight hours, what is the most likely explanation of this inefficient practice? a. The exterior lights are motion activated, and someone recently walked by the two lights that are on. b. The lights are controlled by switches, and one switch has been left on. c. The lights are controlled by photocells, and some of the photocells are dirty.

c. The lights are controlled by photocells, and some of the photocells are dirty.

What are the units used to measure True Power? a. kVA b. kVAC c. kW d. kVAR

c. kW

Lamp efficacy is typically rated in terms of ______ a. lumen-hours per year b. % c. lumens per watt d. $ per kW

c. lumens per watt

What is the recommended control strategy for reciprocating compressors? a. load/unload control b. variable speed c. on-off d. modulating

c. on-off

What are the units used to measure Imaginary Power? a. kVAC b. kVA c. kW d. kVAR

d. kVAR

If a client operates their facility 16 hours a day, 7 days a week, and their Production Load Factor (PLF) is 1.3, what is the most likely explanation? a. The facility uses equipment with high inductive loads (motors, magnetic ballasts, etc.) b. The PLF was calculated incorrectly. c. The facility has a peak electrical demand much higher than their average demand. d. The facility heavily uses back-up generators, battery storage, or thermal storage technologies to reduce their peak electrical demand. e. Facility equipment remains powered during non-production hours.

e. Facility equipment remains powered during non-production hours.

What is the most common type of compressor for applications where a small unit (less than 10hp) is needed? a. Screw b. Scroll c. Centrifugal d. Sliding Vane e. Reciprocating f. Axial

e. Reciprocating