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a. water

A chiller is a part of a building cooling system and is used to directly cool ___. Select one: a. water b. air c. oil

c. shedding

A company monitors its energy consumption. As a predetermined upper threshold of electrical usage is approched, the company removes certain loads. This is known as load ___. Select one: a. reduction process b. reconstruction c. shedding d. removal

b.

A customer wants his outside light to turn ON at dusk and to turn OFF at midnight. Additionally, during his daylight business hours, 5 a.m. to 12 a.m., he wants the lights to turn ON should it get dark outside due to weather conditions. You will set the trippers on the time clock (TC) to turn it ON at 5 a.m. and OFF at 12 a.m. (midnight). Using a TC and a photocell (PC), which of these ladder diagrams will operate the outside light as the customer wishes? TC terminal markings are as follows. Terminal A = clock motor neutral Terminal B = clock motor "hot" Terminal 1 = SPST switch contact Terminal 2 = SPST switch contact

d. 3

A mechanically held lighting contactor, as shown in Figure 414-17, will be used to turn two 277-volt lighting circuits ON and OFF. A two-button pushbutton station with momentary NO contacts will be used in the control circuit. The coil rating on the contactor is 120 volts. The PB station will not be located in the electrical room. The lighting contactor will be located in an enclosure between the 277-volt panelboard and the 120-volt panelboard. Both panels are located in the electrical room. The fewest number of wires you can run between the contactor enclosure and the remote PB station is ___. Select one: a. 6 b. 2 c. 4 d. 3 e. 5

a. is not

A totally closed building that excludes the entrance of outside air ___ healthy. Select one: a. is not b. is

d. building automation system

A(n) ___ can be set to control loads according to the building's schedule on any load changes. Select one: a. attenuating lighting arrester b. light-emitting system c. harvesting system d. building automation system

a. open-loop

A(n) ___ daylight harvesting system measures only the incoming daylight without regard to the contribution from the electric lighting. Select one: a. open-loop b. closed-loop

a. closed-loop

A(n) ___ daylight harvesting system measures the combined contribution to light level from both daylight and the electric lighting system. Select one: a. closed-loop b. hybrid-energy c. electrolytic-conservation d. open-loop

b. mechanically

A(n) ___ held lighting contactor should be used where quiet, energy-efficient operation is required. Select one: a. electrically b. mechanically

d. any of these

An EMCS can become inefficient when ___. Select one: a. filters are not cleaned or replaced when dirty or clogged b. original sensor and actuator calibrations are not maintained c. sensor settings are manually overridden d. any of these

c. either I or II

An existing installation consists of a single-pole switch controlling a 2-pole, electrically held lighting contactor. 12-2 AC cable was installed between the lighting contactor enclosure and the remotely located switch. The customer now wants to replace the lighting contactor with a mechanically held type as shown in Figure 414-17. The new contactor will fit into the existing contactor enclosure. I. Replace the SPST with an SPDT switch, replace the 12-2 with 12-3 cable, and connect the circuit as shown at the right. II. Use the existing SPST switch and the 12-2 cable and add a SPDT control relay to the circuit as shown at the right. Which of the options shown above will operate the new contactor? Select one: a. I only b. II only c. either I or II d. neither I nor II

d. dehumidifying

By ___ the air, a thermostat could be set at 78 degrees on hot and muggy days and still remain comfortable. Select one: a. recirculating b. cooling c. pressurizing d. dehumidifying

c. both a and b

By utilizing an ice storage system, ___ can be saved when chiller or cooling tower loads are shed during peak billing periods. Select one: a. money b. energy c. both a and b d. neither a nor b

a. bacteria growth

Cooling towers must be thoroughly cleaned on a regular basis to minimize ___. Select one: a. bacteria growth b. capillary plugging c. temperature saturation d. power loss

a. 60

Daylight harvesting is a control strategy that can generate an energy savings of up to ___%. Select one: a. 60 b. 40 c. 20 d. 70

b. higher

Electric utilities have ___ billing rates per kW-h during periods of peak usage. Select one: a. lower b. higher

e. all of these

Energy management systems can be used to control ___. Select one: a. fire suppression systems b. automatic window blinds c. heating and cooling equipment d. indoor air quality e. all of these f. none of these

a. output

Equipment such as VFDs, solenoid valves, fans, lighting contactors, relays, switches, and dampers are connected to the ___ terminals of a building management system. Select one: a. output b. input

c. 70

In the United States, about ___% of the electric energy used in the manufacturing sector is by motors. Select one: a. 60 b. 40 c. 70 d. 20

b. wind and solar

Many DER generation sites utilize both ___ power. Select one: a. wind and coal b. wind and solar c. wind and nuclear d. coal and solar

d. all of these

Some building management systems are capable of ___. Select one: a. closing smoke dampers when a smoke alarm is activated b. sending emails and text messages c. controlling the lighting within the building d. all of these e. none of these

b. thermostats

Some energy management control systems have key functions of monitoring and optimizing temperature, pressure, dampers, mixing boxes, and ___. Select one: a. batteries b. thermostats c. fire control d. pressures

a. True

The contacts of a mechanically held contactor can be closed when the coil is deenergized. Select one: a. True b. False

a. time clock

The earliest forms of energy management involved simple ___ and thermostat-based systems. Select one: a. time clock b. photocell c. limit switch d. EMSS systems

b. load shedding

The process of removing loads from a system during peak periods to reduce electricity costs is referred to as ___. Select one: a. daylight harvesting b. load shedding c. DER d. cogeneration

d. keep building air healthy

The purpose for an air handler to mix outside air with inside building air is to reduce the amount of chilled or heated water and to ___. Select one: a. maintain a balanced airflow b. thin out harmful vapors of the unit c. keep the unit cooler d. keep building air healthy

b. high initial cost

The usual problem with a distributed generator is its ___. Select one: a. low production b. high initial cost c. uniform windings d. poor return on investment

a. when one is producing peak power the other is producing minimal power

Typically, wind turbines and solar cells are complementary because ___. Select one: a. when one is producing peak power the other is producing minimal power b. both produce peak power at the same time

a. latches in

Unlike electrically held contactors, the two-wire latching contactor ___ and the coil is removed from the circuit. Select one: a. latches in b. powers up slowly c. discharges quickly d. turn on the circuit

boiler b. amount of cool or warm air flowing into an area within a building

VAV boxes contain dampers which are used to control the ___. Select one: a. amount of warm water supplied by a boiler b. amount of cool or warm air flowing into an area within a building c. amount of water flowing into a chiller

b. NC

When 2-wire control modules are installed on the contactor shown in Figure 414-18, a contact block(s) must also be installed on the contactor so that its contacts are ___. Select one: a. NO b. NC c. both a and b d. neither a nor b

c. both a and b

When 3-wire control modules are installed on the contactor shown in Figure 414-18, a contact block(s) must also be installed on the contactor so that its contacts are ___. Select one: a. NO b. NC c. both a and b d. neither a nor b

b. photosensor

When daylight harvesting is used, the light output of a luminaire(s) is adjusted based on input from a ___. Select one: a. lighting contactor b. photosensor c. PLC d. any of these

b. 2- or 3-wire

When maintained control circuit contacts are to be used as inputs to a contactor, ___ control modules are attached to the contactor. Select one: a. high-current b. 2- or 3-wire c. flush-mounted d. side-mounted

a. I & III only

Which of the following are characteristics of solar cells? I. They have a 20- to 25-year life span. II. They contain no harmful materials and can be disposed of in a landfill without posing any hazard. III. They have a low duty cycle and produce peak power at noon each day. Select one: a. I & III only b. I only c. I, II & III d. II only e. III only

d. Dampers

___ add resistance to airflow and build pressure in HVAC systems. Select one: a. Pressure Amplifiers b. Resistors c. Fins and Flutes d. Dampers

c. Lead-lag

___ is a method used to ensure that redundant equipment ages uniformly. Select one: a. Load shedding b. Daylighting c. Lead-lag d. O&M e. Cogeneration

c. Cogeneration

___ utilizes the heat by-product of electricity generation. Select one: a. Load shedding b. Daylight harvesting c. Cogeneration d. A distributed energy resource system

c. Either a or b

___-pole power poles can be installed on the contactor shown in Figure 414-18. Select one: a. One-pole b. Two-pole c. Either a or b d. Neither a nor b