TEST 4

The four stages of a fire are

incipient, smoldering, flame, heat

"Romex" is a type of

nonmetalic sheathed cable (typically used in small buildings)

A CLO is a unit that measures the insulating value of clothing. A single CLO is equivalent to which of the following:

A business suit

Under normal comfort conditions, the body experiences ______________ of heat loss through evaporation.

15%

Which of the following system voltages is most likely to be used as the primary distribution system in a large commercial or institutional building

277 / 480 volt, 3-phase, 4-wire

Single-axis tracking can increase insolation by ______ throughout the year

35% to 50%

Voltage drop in a feeder or branch circuit should generally be limited to

5% or so

Electricity in Europe and much of Asia is typically

50hz

Electricity in the US is typically

60hz

Typical efficiencies for today's commercial photo voltaic cells is around

8% - 12%

The primary components of a compressive refrigeration cycle include:

Evaporator, condenser, compressor, expansion valve

"Heat pump" is a term used to describe equipment that:

Can provide either heating or cooling (heating-cooling)

An increase in occupancy can directly result in an increase in:

Carbon Dioxide (CO2)

The design process generally flows from:

Conceptual design, to schematic design, to design development

Which (one or more) of the following ratios are actually reasonably important to appropriate performance of passive cooling?

Cross ventilation, Direct gain solar heat gain, Day lighting

Which (one or more) of the following ratios are actually reasonably important to appropriate performance of active cooling?

Cross ventilation, Direct gain solar heating, and Conventional cooling.

The psychometric chart shows the relationship of:

Dry-bulb temperature, wet-bulb temperature, RH

____ is the most prevalent form of E used in modern buildings

Electricity

Electrical loads in buildings generally include

HVAC equipment, lighting, kitchen equipment, plumbing/piping equipment, vertical transport equipment

Problems with poor indoor air quality in buildings seem to be increasing because:

More aggressive indoor pollutants have developed due to global warming

Control of the following air properties is critical when designing for comfort (Choose three):

Motion, relative humidity (RH), and particulate content (pollution)

NFPA stands for

National Fire Protection Association

Mechanical combustion results from all of the following EXCEPT

electric lighting

Which of the following best describes the sources of pollutants normally found in buildings?

Processes, equipment, occupants, finishes, and furnishings

The primary difference between sensible and latent heat is:

Sensible heat affects dry-bulb temperature, whereas latent heat affects moisture content

The concept of "distribution tree" is used to describe:

The means by which cooling and heating are delivered from a central system to conditioned space

Efficacy of a light source is best defined as:

The ratio of lumens provided to energy used

"Hydronic" refers to a system that uses:

Water for distribution of heat

At 100% relative humidity:

Wet-bulb temperature is equal to DB temperature

The difference between a cable and a wire is

a cable is a large wire or an assembly of wires

An electric closet is generally

a fairly small room used to house electric equipment and distribute power to branches

Materials utilized as fire barriers within buildings may also be useful for

acoustic isolation of airborne sound

Transformers may require a protective vault because

an oil-filled transformer is a potential fire hazard

A cable tray is best described as

an open support system for cables

deluge

areas with very high fire hazards

Fuses and circuit breakers

have similar uses but different construction and operation

switches and contactors

have similar uses but slightly different construction

Dry-type electrical transformers

can be installed virtually anywhere in the building

Reliability of a building electrical system is

dependent upon both the buildings electrical system and the utility service

all of the follwing are advantages to underground electric service except

ease of repair

wet pipe

everyday building occupancies

the following smoke control strategy is particularly useful in large atrium spaces

exhaust

Which of the follwing subsystems is less likely than the others to be controlled by a "building automation system (BAS)"

fire suppression

The 3 elements of the fire triangle of needs are

fuel, high temperature, and oxygen

The NEC provides regulations that define

fundamental safety measures for the use of electrical equipment and systems

The National Electric Code

is very specific about acceptable wiring materials and capacities

The purpose of a service switch is to

isolate items of electrical equipment for maintenance and repair

When a conventional automatic sprinkler system operates during a fire

only a very few sprinkler heads go off

Energy used is the product of

power and time

Computer grade power refers to

power that is generally free of power quality problems

An ionization type fire detector will be used to sense

products of combustion generated in the early stages of a fire

The overriding design objective for any electric power distribution system is

safety

portable fire extinguishers would normally be

selected and specified by the architect

When considering property protection, the designer must address _______ very early in the schematic design process

site access for fire fighting equipment

Most fire related deaths are a result of

smoke inhilation

A standby power system is intended to meet loads that will cause inconvenience of some sort if power supply fails; an emergency power system is intended to meet loads

that will endanger occupant safety if power fails

The most common motor in building applications is

the AC squirrel-cage motor

"insolation" can best be defined as

the amount of solar Energy received by a given area; representing a time-averaged value

The difference between a conventional and an addressanle fire alarm system is

the conventional only transmit signals when a condition is detected, the addressable transmits signals on a regular basis

To maximize the total annual isolation for a stationary solar array, the tilt angle should be approximately equal to

the latitude of the site

Current is the electrical term used to describe

the magnitude of the flow of electrons through a circuit

Conductor "ampacity" is determined by

the maximum safe operating temperature of the installation used on the conductor

Power factor represents

the phase difference between voltage and current

Standpipe and hose systems are classified primarily according to

the type of person expected to use the system

The angle, measured from the horizontal, at which a flat-plate collector is mounted is known as the

tilt angle

The objective of an electrical demand control system is

to reduce peak building energy consumption

Ventilation is generally required for indoor transformer installations because

transformers generate a great deal of heat during operation

Which means of service delivery is typically more expensive to install

underground service

A VVF or VFD control system is used to

vary speed of a motor

Ohm's Law establishes the relationship between

voltage, current, and resistance

Underfloor duct distribution systems will typically be used

where flexibility is critical and other systems are not applicable or appropriate