Construction
A joint that is typically used where an addition meets an existing building to allow the two sections to move independently of one another is called a(n)
A) Control Joint
B)Construction Joint
C)Expansion Joint
D)Isolation Joint
D) Isolation Joint - typically used where an addition meets and existing building. An expansion joint also allows for the natural movement of a building but this was specific to additions on existing buildings.
Which of the following plumbing devices most affects the safety and health of a building's occupants?
A) A gate valve
B) A globe valve
C) A trap
D) An interceptor
C - The trap is the device that keeps the sewer gas from entering the building, which would be harmful to the occupants. The gate and globe valves simply regulate water flow. The interceptor keeps solid and grease out of the sewer system.
Which of the following statements in NOT true of a heat pump?
A)It works in the same manner as an air conditioner
B)It cannot deliver more heat energy than the energy required to run the pump
C)It works only between certain temperature ranges
D) it is often used in conjunction with a recirculating heat sink
B - A heat pump DOES deliver more energy than the energy required to run it. That is whole point of the system. It actually moves heat from one point to another rather than creating heat.
Which of the following terms means brightness?
A) luminance
B) Illumination
C) Glare
D) Radiation
A - luminance means brightness.
Rank the following walls in the order of their ability to stop the transmission of sound
I) A concrete wall
II) A stud wall with plaster on both faces
III) A stud wall with plaster and an extra layer of acoustical tile on both faces
A) III,II,I B) I,III,II
C) II,III,I D)III,I,II
B - Mass is the most important factor in stopping the transmission of sound.
What is the function of a catch basis?
A) It holds overflow until it can be drained
B) It collects water under a fixture (often called a sink)
C) It collects surface runoff and admits it to a storm drainage line
D) It intercepts grease and solid objects before they clog a main sewer line
C - a catch basin admits water from a swale to a storm drainage line.
Which of the following is NOT one of the purposes of a vent stack?
A) To provide a vent for sewer gases
B) To keep the water in the trap from getting siphoned out
C) To vent several different drains
D)To provide a vent for the bathroom and its odors
D - the vent stack does not vent the bathroom itself, nor the odors that may occur there.
Which of the following are included in the refrigeration cycle?
I) Freon
II) Compressor
III) Expansion Valve
A)I,II B)II,III C)I,III D) All of them
D - All three are included in a refrigeration cycle.
The intensity of a light source is measured in what units?
A) lumens
B) candlepower
C) footcandles
D) lamberts
B - candlepower!
The ability of a surface to emit heat by radiation relative to that of a black body at the same temperature is called
A) radiation
B) emissivity
C) transmissivity
D) reflectivity
B - Emissivity is the ability of a surface to emit heat by radiation relative to that of a black body at the same temperature.
Air filtration, which compromises and integral part of all HVAC systems, has as its principal purpose the elimination of
A) offensive odors
B) unpleasant mechanical noises
C) interior pollutants
D) atmospheric particles
D - The purpose of air filters is to prevent atmospheric dust, particles, and pollen from entering the HVAC system.
A stack vent is
A) the same as a vent stack
B) the air intake like for all fixtures
C) a pipe into which all the soil and waste lines empty
D) The extension of a soil stack to the outdoors above the highest branch drain
D - a stack vent is the extension of a soil stack to the outdoors above the highest branch drain.
What system removes heat from the air exhausted from a building and transfers it to the incoming fresh air?
A) fan coil system
B) heat pump system
C) Air-to-air heat exchanger
D) variable air volume system
C - air to air heat exchanger removes heat from the air and warms the incoming fresh air, often at a very high efficiency.
What type of light fixture provides the most diffuse lighting?
A) direct
B) indirect
C) semi-direct
D)semi-indirect
B - indirect!
Which of the following systems can provide heating and cooling to different zones simultaneously?
A) variable air volume with electric reheat
B) two-pipe system
C) single duct constant volume
D) none of the above
A - a variable air volume with electric reheat is an HVAC system that accommodates thermal changes by verying the flow of supply air into a conditioned space. Providing an electric reheat allows the temperature of the air to the increased when needed at each mixing box, allowing the system to either heat of cool a given zone.
In masonry walls, water is prevented from seeping back into the wall through capillary action by using
A) base flashing
B) coping
C) drips
D) weep holes
C - drips are extensions of through- wall flashing or projections below masonry units that extend beyond the primary plane of the wall. the purpose of a drip is to force water that is draining off flashing or a sill to fall down and away from the wall.
What is the likely result of excessively hard water in piping?
A) Steel pipe will corrode
B) Plastic pipe will fill with encrustations
C) Copper pipe will rust
D) Steel pipe will plug up with depositions
D - Hard water that there are minerals, typically calcium, dissolved in the water.
Which systems always has both heated air and chilled air running through it?
A) Double duct system
B) Multizone system
C) Fan coil system
D) Variable air volume system
A - a double duct system consists of two ducts, one carrying heated air and one carrying cooled air. The amount of air drawn from each duct at each room is controlled by dampers and mixed in a mixing box.
Light reflectors and refractors are designed to
A) provide a specific distribution of light
B) to reduce glare
C) to reduce veiling effect
D) to increase visibility
A!
A device through which the air moves from a duct passes before entering a room is
A) diffuser
B) grille
C) turning vane
D) damper
A - diffuser!
Which type of fire extinguisher should be provided in an electrical room?
A) class A
B) class B
C) class C
D) class D
C - class C!
Which type of pipe is typically used for sanitary lines in nonresidential buildings?
A) PVC
B) copper
C) ABS
D) cast iron
Which of the following systems can be used if each zone is to be billed separately?
I) heat pump system
II) multizone system
III) unitary system
A) I, II B) II, III C) I, III D) I, II, III
C - The heat pump and the unitary system can have a meter on each unit, thus permitting separate billing.
The recommended luminance level necessary for routine office work, such as reading and writing is
A) 30 footcandles
B) 50 footcandles
C) 70 Footcandles
D) 150 footcandles
The flow of electricity is affected by all of the following EXCEPT
A) potential
B) current
C) power
D) resistance
C - the flow of electricity is identifies by Ohm's law which states that I=V/R, where I is current, V is potential, and R is resistance.