Tests/quizzes Service and Maintenance

T/F A combination cooling and heating units may include electric strips heaters or be of the heat-pump

True

T/F Electrical service for a room unit may also involve the thermostat and the power cord

True

T/F Gas equipment preventive maintenance consists of servicing the air-side components: filter, blower, belt and drive, and the burner section.

True

T/F Hydronic heat circulations are centrifugal pumps

True

T/F If a window air conditioner is installed with an inward pitch, the condensate could leak into the room.

True

T/F In a geothermal heat pump system there is a refrigerant loop and a wter (water and antifreeze) loop

True

T/F In order to prevent water contamination wells used for geothermal heat pump systems are grouted

True

T/F Numerical analysis and review of the home's energy consumption history, which will include both electrical and heating fuel bills is an important part of a residential audit.

True

T/F Oversized air conditioning equipment will cool the space faster

True

T/F Scale results in a low head pressure in the cooling mode and high suction pressure in the heating mode

True

T/F Sealing and insulating the envelope or shell of a home is often the most cost-effective way to improve energy efficiency and comfort

True

T/F Temperature quantity and cleanliness are three important factors that should be addressed when referring to water quality

True

T/F The compressor for room units is a typical hermetically sealed air-conditioning compressor

True

T/F The heat gain on a structure can be summarized as the sum of the conduction loads the internal loads the solar loads and the infiltration loads

True

T/F The more sections a boiler has the higher its capacity will be

True

T/F The temp on both sides of an exterior wall or panel is needed to help determine how much heat is entering or leaving the structure

True

T/F The terms residential energy audit and home energy audit and home energy audit are often used interchangeably

True

T/F The thermostat for room units is usually mounted with the control knob in the control center and the remote bulb in the vicinity of the return air

True

T/F The total heat loss for a structure is simply the sum of the heat losses experienced by all of the construction elements that make up a particular structure

True

T/F The two important factors that affect the U-value for the below-grade portion of the wall are the materials used to construct the wall and how far below grade the floor is.

True

T/F There are different methods to calculate the heat gain on a structure based on the type of house and the number of wall exposures it has.

True

T/F in a closed-loop system the same fluid (water or water and antifreeze) will absorb heat from the ground in the winter and reject the heat to the ground in the summer

True

T/F it is important to note that the air separator does not remove air from the system.

True

T/F making sure heating cooling refrigeration water heating and humidification systems are all working properly and efficiently greatly affect the energy usage of the residence

True

T/F one of the minor differences between troubleshooting a geothermal heat pump and an air-to-air heat pump is how to gain access to pressures and temperatures in the water or ground loop.

True

T/F since the Earth's crust is cooler than the air during the summer it can be used to accept air conditioning heat loads

True

T/F the US DOE says that 12% of a home's total energy bill usually goes toward heating water for household use

True

T/F: A microfarad rating of the run capacitor is much lower than that of the start capacitor of any given motor.

True

T/F: A motor can burn out if the supply voltage is either too high or to low.

True

T/F: A sure sign of contact failure is discoloration on the contact surfaces.

True

T/F: Auxiliary contacts are usually rated a lower amperage than the contractor's primary contacts.

True

T/F: Before Testing a run or start capacitor with an ohmmeter, the capacitor should be discharged with a 20,000-ohm 5-watt resistor.

True

T/F: Contactor contacts that are badly pitted can cause the motor to burn out.

True

T/F: In order to change the direction of rotation of a split-phase motor, the technician must change the direction of current flow through the start winding.

True

T/F: Magnetic overload devices are the most accurate type of device of electrical protection.

True

T/F: Once the start winding and the start capacitor have been removed for the circuit, the motor will continue to operate with only the run winding energized.

True

T/F: One method of a technician can employ to check a motor is to take amperage reading of a motor (both start-upand after start-up) and compare them to the motor's nameplate.

True

T/F: Pulleys must be in proper alignment or belt and bearing wear will occur.

True

T/F: The centrifugal switch mounted on the shaft of a split-phase motor has a normally closed contact.

True

T/F: The contacts in a potential type starting relay are normally closed.

True

T/F: The heavier the load on an operating motor, the greater the amount of slip.

True

T/F: The resistance of the winding in a three phase motor are all equal

True

T/F: There is a a definite relation between the speed of the motor and the speed of the blower.

True

T/F: the locked rotor amperage, LRA, of a motor is typically five time higher than the full load amperage, FLA, of the motor and can be as high as seven times the FLA.

True

T/F: A Capacitor Start Capacitor Run (CSCR) motor that is wired with a potential relay will have the start winding energized when the relay's contacts open.

Ture

T/F: Bimetal and solder pot overload devices are thermally operated

Ture

The ___ -value describes the thermal Conductivity of a material

U-Value

The ground loop configuration that is used when there is a shortage of land is the ___

Vertical

____ heat pumps utilize two coaxial heat exchangers as compared to only one on the water-to-air configuration

Water-to-Water

A(n) ____ insulation calculator tool can provides insulation levels for your new or existing home based on your zip code and other basic information about your home

Zip code

If the voltage supplied to the motor is ell below the motor rated voltage, the current draw will be __ it should be. A. lower than B. the same as C. higher than D. in reverse polarity than

C higher than

The voltage tolerance of a standard electrical is A. +5%-10% B. +10%-5% C. +10%-10% D. +15%-15%

C. +10%-10%

A column of water 1ft high exerts a pressure of A. 0.277 psig B. 0.299 psig C. 0.433 psig D. 14.696 pisg

C. 0.433 psig

When servicing an R-410A window air conditioner, adjust the airflow across the condenser until the head pressure reaches A. 360 psig B. 400 psig C. 420 psig D. 460 psig

C. 420 psig

The evaporator typically operates ___ the dew point temperature of the room air A. Much lower than B. much higher than C. Below D. above

C. Below

When the water and refrigerant in a heat exchanger flow in opposite directions, it is referred to as A. countersink B. parallel-flow C. counter-flow D. bias-flow

C. Counter-flow

___ is the force that allows air to travel into the combustion chamber of a combustion appliance and force the combustion gasses out through a vent or chimney. A. dampening B. thrust C. draft D. Force

C. Draft

The service factor of an electric motor is determined by A. National Electrical Code B. National Electrical Manufacturers Association code C. Motor reserve capacity D. the required wire size supplying power to the motor

C. Motor reserve capacity

The net wall area can be expressed mathematically as: ____. A. Gross wall=Net Wall Area - Door Area + window Area + Area of other components B. Net wall area= gross wall area + door area + window area + area of other components. C. Net wall area = gross wall area - door area - window area- area of other components D. gross wall area + net wall area = Door area - window area - area of other components

C. Net wall area = gross wall area - door area - window area- area of other components

The ___-value is typically used to rate the thermal resistance of insulation materials A. P B. T C. R D. U

C. R

Cavity insulation can be installed at levels up to __ in a 2inx4in wall A. R-5 B. R-6 C. R-15 D. R-21

C. R-15

One of the most commonly used characteristics of building construction materials is the ___-value A. P B. T C. R D. Z

C. R-valve

As the __ increases the rat of heat transfer from one side of the structure to the other will increase A. air temp B. heat differential C. temp D. temp differential

C. Temp

A current magnetic relay opens and closes its contacts based on the A. current in the start winding B. voltage across the start winding C. voltage across the run winding D. Current in the run winding

C. They are too expensive

Why are explosion-proof motors not normally used on standard equipment? A. They are too large B. They are too noisy C. They are too expensive D. They cannot be replaced

C. They are too expensive

Which of the values given below corresponds to a wall with the highest resistance to the pass of heat? A. R-value = 0.80 B. U-value = 1.50 C. U-Value= 0.80 D. R-Value= 1.00

C. U-value= 0.80

An open winding in an electric motor means that. A. the winding is making contact with the motor frame B. one winding is making contact with another winding C. a wire in a winding is broken D. the centrifugal switch to the start winding is open

C. a wire in a winding is broken

An expansion joint is a device used to A. prevent damage between boiler sections B. enlarge the expansion tank in the system C. allow for expansion and contraction of the loop piping with water temperature changes D. connect the manual vent into the system

C. allow for expansion and contraction of the loop piping with water temperature changes

When a general duty split-phase motor reaches approximately 75% of its operating speed, the start winding is de-energized by a A. Circuit board B. capacitor C. Centrifugal switch D. dual volatge switch

C. centrifugal switch

Grounding straps are required on resilient mounted motors to A. prevent rotation of the motor in the mount B. help reduce motor vibration transfer to the object on which the motor is mounted C. ground the motor in case of windng failure D. act as the position for locating the motor leads

C. ground the motor in case of winding failure

the shaded pole motor A. has little starting torque B. has excessive starting torque C. has greater efficiency than most split-phase motors D. will start against a heavy starting load

C. has greater efficiency than most split-phase motors

The evaporator of a window air conditioner should operate A. far below freezing temp B. far above freezing temp C. just above freezing temp D. at 15F

C. just above freezing temp

A slotted screw at the bottom of the bearing hosing is called a A. drain plug B. purge screw C. relief plug D. retaining crew

C. relief plug

A permanent split-capacitor motor has a A. Start and run Capacitor B. Start Capacitor only C. Run capacitor only D. Larger diameter wire than the run winding

C. run capacitor only

3-phase motors have A. 3 start and 3 run windings for each phase B. one start and one run winding for each phase C. run windings only D. a start switch in each phase circuit

C. run windings only

Start windings are placed ___ with the run windings. A. 180 degrees out of phase B. in phase C. slightly out of phase D. in series

C. slightly out of phase

The expansion tank provides a means of removing the air from the system as well as provide A. a space for excess water from the supply source B. water for the domestic hot water coil C. a space for the water expansion and contraction with water temp chagnes D. all of the above

C. space for the water expansion and contraction with water temp changes

According to the united states department of energy (US DOE) 43% of the energy used by the average home goes toward ____ A. heating water B. refrigeration C. space heating and space cooling D. lighting

C. space heating and space cooling

When referring to motors to what does the insulation class relate? A. the noise level of the motor B. the type of base on which the motor is mounted C. the normal operating temperature of the motor D. both a and b

C. the normal operating temperature of the motor

an inherent motor protector is a A. circuit breaker B. motor starter overload C. thermally activated device in the motor winding D. line fuse

C. thermally activated device in the motor winding

In a heat-pump room air conditioner in the cooling cycle, the indoor coil acts as the

Condensor

____ spaces include the areas of the residence that are heated or cooled

Conditioned

the low-water ___ valve is responsible for deenergizing the hydronic system in the event the level of water in the system drops below the desired point

Cutoff

Central air conditioning systems operate with a design evaporator saturation temperature of about

40F

T/F A domestic hot water loop is often used for heating domestic hot water from the hot discharge gas coming from the heat pump's refrigerant compressor.

False

T/F Adding insulation to the attic is fairly difficult but very cost effective.

False

T/F All 230-V power supplies use the same style plug.

False

T/F An extremely dirty air filter can cause the window air conditioner to operate at low suction pressures

False

T/F Construction materials have a minor effect on the rate of heat transfer through the structural envelope

False

T/F Expansion tanks must always be bled from the top until all of the air is removed from it.

False

T/F Furnace manufacturers use standard pressure settings for their pressure switches

False

T/F Heat exchange between the capillary tube and the suction line is typically found on window air conditioners

False

T/F In a series loop the water going through the last terminal unit will be the same temperature as the water through the first terminal unit

False

T/F The occupants of a house do not add to the heat gain of the structure

False

T/F Ventilation has little effect on moisture control

False

T/F Very little heat is lost through the room

False

T/F When it comes to sizing air conditioning and heating equipment bigger is definitely better

False

T/F diagnostic testing and evaluation of the home and it systems is perhaps the least important phase of a residential audit

False

T/F the total heat loss for the basement walls is the product of the heat losses for the below-grade and above-grade walls

False

T/F: A drip-proof motor is designed to prevent any lubricating oil form leaving any of the bearings.

False

T/F: A set of contacts are closed when the relay is energized. These contacts are classified as normally closed.

False

T/F: Belt tension will not have any affect on the wear of the bearings.

False

T/F: If a resilient-mounted motor develop a short to the frame, the technician can simply cut the ground strap wire as a permanent repair.

False

T/F: If the cost of repairing the motor is close to the cost of replacing the motor, it would definitely pay to repair the motor if the new components carries a one-year warranty and the repaired motor carries only a 90-day guarantee.

False

T/F: Open winding will not affect the resistance reading of the start winding as well as the resistance reading between the Run and Start terminals.

False

T/F: Regardless of the type of motor or application, the motor bearings require yearly lubrication.

False

T/F: The electrical components for a fully welded hermetic compressor are checked at the disconnect box for the compressor unit.

False

T/F: The magnetic fields generated in the rotor and stator of a motor causes the rotor to be pushed around the shaft.

False

Most residences with modern hydronic heating systems use ___ baseboard heat transfer for terminal heating uints

Finned tube

T/F: The contacts in a current type starting relay are normally closed.

Flase

T/F: When oiling a permanently lubricated motor, a 20-weight, non-detergent motor oil should be used.

Flase

An automatic air vent controls the airflow out of the system by means of a(n) ___ which rises and falls with the amount of air in the system

Float

A permanent split capacitor (PSC) motor that is running and up to speed will have the start winding A. energized B. de-energized C. in series with the run winding D. removed from circuit

A energized

In a closed-loop system, the plastic pipes that are buried in the earth are called A. ground loops B. thermal loops C. water loops D. both and and c

A ground loops

A sleeve bearing would typically be used in a motor that operates with a ____. A. light load and where noise is a factor B. heavy load and where noise is a factor C. heavy load in a dirty atmosphere D. heavy load in a moist atmosphere

A light load and where noise is a factor

Homeowners can cut utility bills by ___% or more by following energy audit recommendations. A. 15 B. 20 C. 25 D. 30

A. 15

A split-phase has a ___ winding and a ___ winding A. Start, Run B. Start, common C. Common run D. Run, omon

A. Start, Run

When a contactor's coil is energized, how much resistance should be measured between terminal "L1" and terminal "T1"? A. zero ohms. B. 50-3000 ohms C. 5000-6000 ohms D. infinite

A. Zero ohms

The window unit must be installed in such a manner that air can circulate across the ___ and not recirculate or high head pressures will results A. condenser B. evaporator C. compressor D. metering device

A. condenser

The condensate off off the evaporator coil in a room air conditioner is generally disposed of by A. draining to the outside soil B. piping to a storm drain C. draining to the slinger system of the fan D. draining to a holding tank

A. draining to the outside soil

The recommended way to discharge a capacitor is to A. place a screwdriver across the terminal B. assume it will discharge itself over a period of time C. use a 20,000ohm 5 watt resistor that has had insulated leads soldered to it D. use an ohmmeter

A. place a screwdriver across the terminal C. use a 20,000ohm 5 watt resistor that has had insulated leads soldered to it

Two common reasons for motor failure are improper pulled alignment and ____.

Overtight belts

____ walls are walls that separate a conditioned interior space from an unconditioned interior space

Partition

The U-valve and the ____ are inverses of each other

R-valve

The best way to repair a defective relay is by ___.

Replace it

The rotating portion of an electric motor is called the _____.

Rotor

A common practice in condensing units is to use a contactor with only one set of contacts opening only one side of the power to the unit. This is to A. reduce the cost of the contactor B. make it easier to wire the unit C. teach the service technician not to put hands in the unit with the power on D. provide off-cycle heat to the compressor

A. reduce the cost of the contactor D. provide off-cycle heat to the compressor

An advantage of a "parallel flow" configuration of ground loop is A. smaller diameter pipes B. ease of removing trapped air C. simplified flow path D. higher heat transfer per foot

A. smaller diameter pipes

If a condenser fan motor grounds out, it will usually A. trip a circuit breaker to shut off the unit B. keep running as the current is only going to ground C. run a little faster because the amperage draw will increase D. cause the evaporator to ice up

A. trip a circuit breaker to shut off the unit

How many air moving motors do cooling-only room air conditioners usually have?

one

The most common refrigerant used in older room air conditioners is A. R-12 B. R-22 C. R-410A D. R-500

B R-22

Tech A says that a shorted winding will result in an increased current flow through the winding. Tech B says that if a motor is to be replaced, a motor with a lower horsepower rating should always be used. Which of the following statements are correct? A. Tech A correct Tech B correct B. Tech A correct Tech B incorrect C. Tech A incorrect Tech B correct D. Tech A and B incorrect

B Tech A correct Tech B incorrect

Technician A says that if you take a voltage reading from terminal L1 to terminal T1 on a contactor whose coil is energized yo should read zero volts. Technician B says that contactors can only have normaly open contacts. Which of the following statements is correct? A. Tech A is correct Tech B is correct B. Tech A is correct Tech B is incorrect C. Tech A is incorrect Tech B is correct D. Tech A is incorrect Tech B is incorrect

B Tech A is correct Tech B is incorrect

The hot gas line from the heat pump's compressor can be used to A. cool down the condensor B. heat domestic water C. Keep the well water from freezing D. Both and and c

B heat domestic water

What is the temp differential between water in a water out of a heat exchagner that has transferred 50,000Btu/h? The flow rate is 10 gallons per minute. A. 5 degree B. 10 degree C. 20 degree D. 50 degree

B. 10 degree

A heat-pump style room air conditioner has all the major components of a cooling-only unit with the addition of a A. 3-way valve cycle B. 4-way valve cycle C. quarter-turn valve D. line-tap valve

B. 4-way valve cycle

When a Capacitor Start Induction Run (CSIR) motor is running and up to speed, what is the total capacitance acting on the motor? (Assume the run capacitor is 5 microfarads and the start capacitor is 20 microfarads, if present) A. 4 microfarads B. 5 microfarads C. 20 microfarads D. 25 microfarads

B. 5 Microfarads

A split-phase motor that has a current relay and a start capacitor is called an ___ motor. A. Capacitor Start, Capacitor Run (CSCR) B. Capacitor Start, Induction Run (CSIR) C. Induction Start, Induction Run (ISIR) D. Permanent Split Capacitor (PSC)

B. Capacitor Start, Induction Run (CSIR)

___ draft is taken in the vent stack between the combustion device and the draft diverter A. Over-the-fire B. chimney C. Vent D. Combustion

B. Chimney

The starting device usually used on single phase, fractional horsepower motors requiring low starting torque is the A. potential relay B. Current relay C. Centrifugal switch D. Differential relay

B. Current relay

Standards for motor overload protection are set by the A. United states department of transportation B. National Electrical Code C. Environmental Protection Agency D. American National Standards Institute

B. Environmental Protection Agency

If the resistance of the run winding decreases, the A. motor probably not start B. motor will draw too much current while it is running C. Centrifugal starting switch will not start the motor D. load on the motor is probably too great

B. Motor will draw too much current while it is running

___ streaks in a flame are dust particles burning A. Yellow B. Orange C. Blue D. Red

B. Orange

Most electrical problems with an electric motor are A. short circuited windings, closed windings, and grounded windings. B. Short circuited windings open windings and grounded windings C. All of the above D. none of the above

B. Short circuited windings. open windings and grounded windings

The wiring and connectors that carry the power to a motor must be in good condition. When a connection becomes loose, oxidation of the copper wire occurs. The oxidation A. has no effect on the electrical connection B. acts as an electrical resistance and causes the connection to heat more C. decrease the resistance D. None of the above

B. acts as an electrical resistance and causes the connection to heat more

the addition of of a window air condition of __ size may overload a circuit A. medium B. any C. small D. line-tap valve

B. any

the alignment of a motor and the driven mechanism must be done at room temp and A. after heating with a torch B. at operating temperature C. after running for one mninute D. again after several days of operation

B. at operating temperature

The term ____ is used to describe walls or portions of walls that are below ground level. A. under grade B. below grade C. level grade D. wall grade

B. below grade

the motor that should be used in a potentially wet area is an ___ motor A. enclosed B. drip proof C. explosion proof D. open

B. drip proof

Capacitors wired in series with the starting winding provide a A. longer starting time B. greater starting time C. aid in starting 3-phase motor D. more efficient operation at full load speed

B. greater starting torque

Beside maintaining pressure on the contacts for current carrying capacity, the pressure springs have a second important function. this is to A. keep the contacts in line B. help obtain equal contacts against the stationary contacts C. slow down the pull of the armature into place to reduce the noise. D. increase the power required to close the contacts

B. help obtain equal contacts against the stationary contacts

The pressure relief valve A. regulates the pressure of the water in the supply line B. is set to relieve the pressure in the boiler below its maximum design pressure C. shuts the boiler off if the water temperature gets too high D. relieves the pressure in the expansion tank

B. is set to relieve the pressure in the boiler below its maximum design pressure

Which of the following overload devices is not affected by ambient temp? A. solder pot B. Magnetic C. bimetal D. time-delay fuse

B. magnetic

The start windings have A. fewer turns than the run windings B. more turns the run windings C. the same number of turns as the run windings D. larger diameter wire than the run windings

B. more turns than the run windings

Probably the easiest way to determine what size lumber was used to frame a house is to inspect the ___

Blueprints

Pumps generally have a cast-iron body with the impeller and other moving parts made of ___ or nonferrous metals

Bronze

The ____ is nothing more than a large tank that both receives water from the condenser as well as supplying water to the condenser

Buffer Tank

A technician needs to check a single-phase compressor. He labels the three terminal A, B, and C takes resistance reading of the windings. He read 10 ohms from A-B infinity from B-C, and infinity from C-A identify the terminals A. A-Common, B-start, C-run B. cannot identify terminals: winding grounded C. A-start, B-run,C-Common D. cannot identify terminals: opening winding

D cannot identify terminals: open winding

The locked-rotor amperage is normally __ times as great as the run-load amperage. A. 2 B. 3 C. 5 D. 10

D. 10

When a Capacitor Start, Capacitor run motor initially starts, what is the total capacitance acting on the motor? (Assume the run capacitor is 5 microfarads and the start capacitor is 20 microfarads if present) A. 4 microfarads B. 5 microfarads C. 20 microfarads D. 25 microfarads

D. 25 microfarads

Air in a hydronic system can cause _____. A. reduced water circulation B. increased water concentration C. corrosion D. both A and C

D. Both A and C

Which of the following voltages are not safe for a 208-V motor to operate? A. 170 V B. 220 V C 238 V D both A and C

D. Both A and C

___ is a colorless and odorless gas which can sicken or kill persons residing in the home A. Hydrogen B. Nitrogen C. Carbon dioxide D. Carbon monoxide

D. Carbon Monoxide

The heat transfer rate through a window is found through A. Q= U-valve + TD + Area B. Q= U-valve + TD x Area C. Q=U-valve x TD + area D. Q= U-valve x TD x Area

D. Q= U-valve x TD + Area

The most common refrigerant used in newly manufactured room air conditioners is A. R-12 B. R-22 C. R-500 D. R-410A

D. R-410A

the higher the __-value the better your walls and roof will resist the transfer of heat A. S B. T C. P D. R

D. R-value

What is the best method to repair a fractional horsepower motor that has bad bearings A. Replace the bearings B. Replace the bearings and shaft C. Add a capacitor to the circuit for added torque D. Replace the entire motor

D. Replace the entire motor

If the motor hums, but does not start, there is a potential problem A. with the starting components B. with an open winding C. with insufficient supply voltage D. all of the above

D. all of the above

The most basic heat gain and heat loss calculations are based solely on the ____ of the space being conditioned A. location B. height C. circumference D. area

D. area

The reason for using zone valves on a hydronic heating system is to A. allow different areas of the structure to maintain different temperatures B. reduce the chance of a water leak C. prevent unused parts of the house from getting warm, and wasting energy D. both A and C

D. both A and C

To ensure correct direction of refrigerant flow in heat-pump-style room air conditioner __ are included in the unit A. filter drivers B. globe valves C. quarter-turn valves D. check valves

D. check valves

A direct-drive for motor overload protection are set by the A. Cradle mount B. rigid base mount C. Pulley D. coupling

D. coupling

Many coaxial heat ex changers are made of A. steel B. aluminum C. nickel D. cupronickel

D. cupronickel

The more common type of expansion tank is the ___ expansion tank A. compression B. standard C. restricted D. diaphragm-type

D. diaphragm-type

___ minimizes the interaction of the furnace with other combustion appliances A. heat venting B. pressurized venting C. Indirect venting D. direct venting

D. direct venting

The series loop system is the hydronic system that is found most often, primarily because of the A. heated water flows in the same direction in parallel pipes B. first terminal units being supplied will be a warmer than the later ones C. possibility of having individual temperature control for each area being heated D. low installation costs

D. low installation costs

A motor's speed is determined by A. size B. voltage C. amperage D. number of motor poles

D. number of motor poles

A high-limit control on a hot water boiler is needed to A. regulate the amount of water to each section of baseboard B.regulate the water in the supply line to the boiler C. balance the water flow rate in the piping system D. protect the boiler against excessive water temp

D. protect the boiler against excessive water temp

Flexible products made from mineral fibers, such as fiberglass and rock wool are known as ___ A. rigid fill insulation B. Roll-in-place insulation C. loose-fill insulation D. rolls and batts

D. rolls and batts

measuring the total air duct leakage is accomplished with a(n) ___ test

Duct fan

Geothermal heat pumps use the ___ water as heat source or a heat sink

Earth

Closed-loop or ___ systems reuse the same heat transfer fluid which is circulated in buried plastic pipes within the earth or within a lake or pond.

Earth-coupled

The walls of a structure make up a large portion of the ___ or shell of the structure

Envelope

In a heat-pump-style room air conditioner in the heating cycle the indoor coil acts as the ____

Evaporator

If the applied voltage is too high, the motor is called the ___

High Amps

One of the most cost-effective ways to make your home more comfortable year-round is to add ___

Insulation

The difference between synchronous speed and full load speed is called ___

Slip

Hydronic heating systems are systems in which water or ____ carries the heat through pipes to the areas to be heated.

Steam

the meter device in a modern air conditioner is

TXV/Cap Tube

If the resistance of the run winding is lowered, the imbalance in magnetic fields between the start and run winding will be increased, and the starting torque of the motor will actually increase.

True

Three common types of antifreeze are salts, glycols and ___

alcohol

The term used to reference the assembly of all the components that make up the air-conditioning system is A. casement B. sleeve C. chassis D. wrap-around

c. chassis

The vanes of the impellers used in circulating pumps in hot water heating systems are usually enclosed, and are referred to as ___ impellers

closed

A "dedicated geothermal well is part of a(n) ____ system

closed loop

Open-loop water-source heat pump systems involve the transfer of heat between a water source and the air or water being circulated to an ___ space

conditioned

The device that transfers the motor's energy to the driven component is called the ____

drive machine shaft

The ___ is simply the sum of the individual heat losses of the structure

envelope load

the term that is used to describe the area of a wall before any doors or windows are cut into it is ____

gross wall area

Before deciding to purchase or install an open-loop system the ____ must be evaluated first

ground/foundation

If the needle of an ohmmeter used to check a capacitor goes to the 0 ohms reading and does not move, this would indicate that the capacitor is ____________

shorted or bad

Window installation of room units are for either double-hung or ____ windows

single -pane

A(n) ____ blower is used to move the air through the air distribution system

squirrel cage