Building Utilities - Refresher Course
Learn
Practice Test
Spaced Repetition
Match
Flashcards1/174
Earn XP
Description and Tags
Best learn in https://quizlet.com/802050560/refresher-course-mechanical-design-equipment-and-acoustics-flash-cards/?i=1ip57m&x=1jqt Cus Cuz it has choices
Name | Mastery | Learn | Test | Matching | Spaced |
|---|
No study sessions yet.
175 Terms
Which of the following HVAC systems would have the highest operating cost for a large office building?
Double duct constant air volume
3 MULTIPLE CHOICE OPTIONS
The objective of having a larger radius of curvature for concave surfaces within the room is to___.
Avoid creating hotspots
3 MULTIPLE CHOICE OPTIONS
For rooms with similar ceiling height but different volumes, when given a choice between ceiling and wall to put materials with higher sound absorption coefficient, it is always advisable to____.
Treat walls for rooms with larger volumes and ceiling for small volume rooms.
3 MULTIPLE CHOICE OPTIONS
Control of which thermal comfort determinant can usually not be accomplished (in many climates) without mechanical assistance?
Relative humidity
3 MULTIPLE CHOICE OPTIONS
The following are disadvantages of a local HVAC system:
- noise with the potential to disturb space activities
- air quality is more difficult to maintain than in a central system
- there is little opportunity to reuse equipment waste heat
2 MULTIPLE CHOICE OPTIONS
The procedure for sizing cooling equipment is more complicated than for heating equipment because:
latent as well as sensible heat must be considered for cooling equipment
3 MULTIPLE CHOICE OPTIONS
Which type of HVAC system makes the most sense for an interior zone of a large- floor-plate building?
single-duct VAV (variable air volume)
3 MULTIPLE CHOICE OPTIONS
Which of the all-air HVAC systems has the smallest distribution tree?
single-duct
3 MULTIPLE CHOICE OPTIONS
Which HVAC system functions by mixing incoming supply air with room air by way of high-pressure jets or nozzles rather than fans?
induction systems
3 MULTIPLE CHOICE OPTIONS
Which HVAC system would be the most appropriate choice for hospital?
Fan coil with supplementary air exhaust.
3 MULTIPLE CHOICE OPTIONS
The term used to define a material's sound absorption characteristic is:
coefficient of absorption
3 MULTIPLE CHOICE OPTIONS
Reverberation is the persistence of sound after a sound source has ceased. Such persistence of sound is a result of:
repeated reflections
3 MULTIPLE CHOICE OPTIONS
The critical frequency range for human speech communication is:
300 to 4000 Hz
3 MULTIPLE CHOICE OPTIONS
The decibel is best defined as the following:
a numerical scale devised to conveniently describe sound magnitude
3 MULTIPLE CHOICE OPTIONS
The optimum reverberation time in seconds, for speech, can be approximated using a formula based on the _____ of the space.
spatial volume
3 MULTIPLE CHOICE OPTIONS
In the Philippines, most commercial buildings are equipped with:
automatic sprinkler system
3 MULTIPLE CHOICE OPTIONS
Which of the following building features inhibit fire protection efforts?
escalators & atriums
3 MULTIPLE CHOICE OPTIONS
Which of the following fire types should be counteracted with a Class C fire extinguisher?
live electrical fires
3 MULTIPLE CHOICE OPTIONS
Which of the following is correct about step down electrical transformers?
has a greater number of turns in its primary coil than its secondary coil
3 MULTIPLE CHOICE OPTIONS
Oil-insulated transformers can be expensive to install indoors because:
they must be placed in a fire-resistant vault
3 MULTIPLE CHOICE OPTIONS
PCB or polychlorinated biphenyl is a nonflammable liquid coolants that has largely been used in transformers. Why PCB coolants are now banned in transformer applications?
the coolants contain PCBs, are highly toxic causes auto-immune disease.
3 MULTIPLE CHOICE OPTIONS
The current rating of an electrical service item is determined by:
the maximum temperature at which its components can operate at full load
3 MULTIPLE CHOICE OPTIONS
A 120/240V single-phase, three-wire system would be used primarily to serve:
a single family residence or small commercial building
3 MULTIPLE CHOICE OPTIONS
Elevators can account for as much as ___ of a mid-rise (25-story) building's construction cost.
10%
3 MULTIPLE CHOICE OPTIONS
An elevator's counterweight should be equal to the weight of:
an empty car plus 40% of the rated live load
3 MULTIPLE CHOICE OPTIONS
Gearless traction machines are usually used for passenger service, with car capacities between:
2000 lb (907 kg) and 4000 lb (1814 kg)
3 MULTIPLE CHOICE OPTIONS
Which of the following contributors to indoor air quality can be controlled by HVAC system?
Air change effectiveness, Carbon dioxide level, Humidity & Humidity
3 MULTIPLE CHOICE OPTIONS
Which of the following have significant effect on heat gain?
Sunlight
3 MULTIPLE CHOICE OPTIONS
Which of the following statement is Incorrect?
Relative humidity is the best measure of thermal comfort
3 MULTIPLE CHOICE OPTIONS
A start up developer is planning to build a small shopping center for rental. A one-story mall will consist of 4000 sqm rentable area surrounding a small courtyard. Existing utilities adjacent to the site includes water, sanitary, storm sewer, and electricity. Which of the following factors would be important in the selection and design of HVAC system? (Choose two that applies)
Climatic zone & Building scale.
3 MULTIPLE CHOICE OPTIONS
An architect is designing a geriatric/nursing home with 150 beds. The patients have varying levels of mobility and independence. The building manager request an HVAC system that permits each patient to control the temperature in his own room. That is quiet and requires minimal maintenance. Which type of system is most appropriate?
Fan coil unit Variable Refrigerant Flow (VRF)
3 MULTIPLE CHOICE OPTIONS
Weather stripping affects
Infiltration
1 MULTIPLE CHOICE OPTION
Which of the following statements regarding escalator is true?
Escalators are installed at an angle 30 degrees from the horizontal
3 MULTIPLE CHOICE OPTIONS
Which of the following are expected results of a properly designed and implemented building commissioning plan? Choose 4 that apply
Increased in energy efficiency, A comprehensive training for maintenance, Operation and maintenance manual delivered to the owner in useful and organized format, & Record drawings for all HVAC and electrical components
2 MULTIPLE CHOICE OPTIONS
Which type of HVAC system would be best choice for large buildings where a need of simultaneous heating and cooling is expected?
Dual duct
3 MULTIPLE CHOICE OPTIONS
Which of the following would not be appropriate for the fire protection in hotelsuites?
Photoelectric detector
3 MULTIPLE CHOICE OPTIONS
Buildings more than meter high must have an automatic sprinkler system throughout the building.
16
3 MULTIPLE CHOICE OPTIONS
The available fire extinguisher can only be used for a duration of
30-40secs
3 MULTIPLE CHOICE OPTIONS
Fire dampers installed in HVAC ducts to prevent the spread of fire from one compartmentto another is triggered to activate by .
Heat detector
3 MULTIPLE CHOICE OPTIONS
Under NBC, the clearance between the underside of the car and the bottom of the pit shall not be less than .
600mm
3 MULTIPLE CHOICE OPTIONS
The criteria in the selection of an elevator other than interval and average waiting time
Round trip time
3 MULTIPLE CHOICE OPTIONS
This lift is most frequently found in public and institutional buildings because it is particularly applicable to short rise, heavy load, frequent-duty applications, and requires minimal maintenance.
Geared traction
3 MULTIPLE CHOICE OPTIONS
An architect is designing an art school at a major university. Which combination of daylighting and electric lighting would be the most appropriate choice?
North facing window, transom window and lighting fixtures of high CRI fluorescent
3 MULTIPLE CHOICE OPTIONS
What combination of lighting would be most appropriate in women's boutique and apparel store?
Limited daylight, warm-white fluorescent for general lighting and tungsten halogen for accent lighting.
3 MULTIPLE CHOICE OPTIONS
Which of the following is a requirement of electrical receptacles to be installed in a residential bathroom?
Use receptacles with ground fault circuit interrupter protection
3 MULTIPLE CHOICE OPTIONS
Which of the following can be used and applied to AC ducting to effectively to limit low-frequency sounds in an HVAC system?
Duct lining/insulation & Resonator
3 MULTIPLE CHOICE OPTIONS
In the drawing below of a refrigeration system for a large building, what is the term for E ?
Cooling Tower
3 MULTIPLE CHOICE OPTIONS
When a jurisdiction is governed by national, state, and local building codes, and provisions in at least two of these codes conflict, which code takes precedence?
Most restrictive code
3 MULTIPLE CHOICE OPTIONS
The diagram above indicates the use of which of the following devices to control lighting from two locations?
Two single-pole, double-throw switches
3 MULTIPLE CHOICE OPTIONS
A four-pipe fan-coil system functions as which of the following?
Heating and cooling system
3 MULTIPLE CHOICE OPTIONS
In contrast to wet-pipe sprinkler systems, dry-pipe sprinkler systems are used because they
Will not freeze in unheated space.
3 MULTIPLE CHOICE OPTIONS
What is the term for Z in the drawing below?
Vibration isolator
3 MULTIPLE CHOICE OPTIONS
The psychrometric chart plots which of the following factors? Check the three that apply.
Relative humidity, Air temperature, & Dew point
3 MULTIPLE CHOICE OPTIONS
The highest rate of heat gain or loss in a building today is usually a result of:
outside air infiltration.
3 MULTIPLE CHOICE OPTIONS
From irregular surfaces some sound will get reflected whereas some will get diffused because ____.
Variations in wavelength can happen; low-frequency sound gets reflected and the high-frequency sound gets diffused.
3 MULTIPLE CHOICE OPTIONS
The random incident sound absorption coefficient is the average value of the sound absorption coefficient for ___.
Different angles of incident for a specific sound frequency.
3 MULTIPLE CHOICE OPTIONS
The acoustical purpose of adopting a false ceiling in a space may be attributed to the following reason except for_____.
Reduce the length of travel of reflected sound.
3 MULTIPLE CHOICE OPTIONS
The suitability of application of anechoic wedges is in the case except
Achieved maximum sound reflection
3 MULTIPLE CHOICE OPTIONS
What is the advantage of maintaining a low reflective ceiling in a conference room?
To help sound to move from end to the other table as early reflections
3 MULTIPLE CHOICE OPTIONS
The acoustical purpose of raking the floor of an auditorium is
Better visibility and sound attenuation
3 MULTIPLE CHOICE OPTIONS
Which of the following statements are true for auditorium ceilings? Multiple flat reflective surfaces at different angles are preferred over a single flat surface because___.
Reflected sound travels a lesser distance at different angles than flat ceiling thus minimizing long-delayed reflections
3 MULTIPLE CHOICE OPTIONS
What is the single number often used to evaluate the acoustic qualities of partition assembly?
Sound transmission class
3 MULTIPLE CHOICE OPTIONS
Leandro Locsin's thin shell dome for UP Parish of the Holy Sacrifice is an example of what type of acoustical defects may be observed? Check three that applies.
Sound shadow, Sound concentration, & Sound creep
3 MULTIPLE CHOICE OPTIONS
What is the term for the minimum intensity capable of evoking an auditory sensation in the ear?
Threshold of audibility
3 MULTIPLE CHOICE OPTIONS
The following statements are true with regards to sound except ___.
that sound travels in a vacuum
3 MULTIPLE CHOICE OPTIONS
What type of sound absorbent is best for lower band frequency?
Panel absorber
3 MULTIPLE CHOICE OPTIONS
Among are statements that defines architectural acoustics except_______?
Sound Amplification System and Sound reproduction are the subdisciplines of architectural acoustics.
3 MULTIPLE CHOICE OPTIONS
Sound diffusion occurs when sound waves are dispersed equally in a room. The uniform distribution of sound in a room creates a homogeneous field. Which of the following methods least likely creates sound diffusion?
Providing flat and smooth surface panel near the sound source.
3 MULTIPLE CHOICE OPTIONS
In designing an auditorium, one objective is to provide adequate loudness in every part of the auditorium, particularly in the remote seats. Thereby architects should consider in the design parameters how to reduce sound energy loss. Among are methods and techniques in maintaining adequate loudness in an auditorium except for__________.
The sound source should be closely and abundantly surrounded with sound absorptive finishes surfaces
3 MULTIPLE CHOICE OPTIONS
Of all architectural building/space type, which among the following are much complex and requires much of acoustical attention and noise control?
Recording studio
3 MULTIPLE CHOICE OPTIONS
Which of the following statement does not exemplify noise and noise control?
Structure-borne sound is a fraction of the original sound.
3 MULTIPLE CHOICE OPTIONS
The noise reduction (NR) between two spaces separated by a barrier is defined as:
the difference between the reverberance in the two rooms
3 MULTIPLE CHOICE OPTIONS
Which of the following statements are false?
Most healthy young people can hear sounds in range 15HZ to 25,000Hz
3 MULTIPLE CHOICE OPTIONS
One ton of cooling capacity is equivalent to:
The useful cooling effect of one ton (12,000 Btu/h [3.5 kW]) of ice
3 MULTIPLE CHOICE OPTIONS
What is a disadvantage of using refrigerants that contain no chlorofluorocarbons and thus constitute a low threat to the environment?
all of the above
3 MULTIPLE CHOICE OPTIONS
The absorption refrigeration cycle needs about ___ times the heatrejection capacity of the vapor compression refrigeration cycle.
2
3 MULTIPLE CHOICE OPTIONS
Even though no change in total heat content occurs, evaporative cooling is accompanied by:
an increase in relative humidity
3 MULTIPLE CHOICE OPTIONS
Which of the following materials has the highest emittance?
white granular-surface bitumen
3 MULTIPLE CHOICE OPTIONS
A central HVAC system with the following classification would require the largest distribution tree:
All air system
3 MULTIPLE CHOICE OPTIONS
The two primary acoustical characteristics of an enclosed space are:
absorption and reverberation
3 MULTIPLE CHOICE OPTIONS
The goal of architectural acoustics is as follows:
design spaces to meet hearing needs
3 MULTIPLE CHOICE OPTIONS
Human beings can hear sounds with frequencies ranging from:
20 to 20,000 Hz
3 MULTIPLE CHOICE OPTIONS
In architectural acoustics, frequency is sometimes referred to as:
pitch
3 MULTIPLE CHOICE OPTIONS
Which of the following terms does not relate to sound magnitude:
sound frequency
3 MULTIPLE CHOICE OPTIONS
Sound intensity level changes by 3 dB with every doubling or halving of power and changes by ____ dB with every doubling or halving of the distance from a point source.
6
3 MULTIPLE CHOICE OPTIONS
The following is not a definition of noise:
sound outside of the normative frequency ranges
3 MULTIPLE CHOICE OPTIONS
Which of the following is not a correct conclusion regarding annoyance as a result of noise. Annoyance is:
greater for nonsense noise (foreign language) than information-bearing noise (a neighbor's radio)
3 MULTIPLE CHOICE OPTIONS
The converse of reverberation is articulation. An articulate environment keeps each sound event separate rather than running them together. Spaces for speech activities should be:
more articulate, less reverberant
3 MULTIPLE CHOICE OPTIONS
Most indoor spaces contains the following sound fields:
a near field, a reverberant field, and a free field
3 MULTIPLE CHOICE OPTIONS
Noise reduction Coefficient (NRC) is:
an arithmetic average of absorption coefficients at four frequencies
3 MULTIPLE CHOICE OPTIONS
Concave domes, vaults, or walls will lead reflected sound into certain areas of a room. This is called:
concentration
3 MULTIPLE CHOICE OPTIONS
_______ is a design procedure for analyzing the reflected sound distribution throughout a hall using the first reflection only.
Ray diagramming
3 MULTIPLE CHOICE OPTIONS
Fan-shaped are preferred for auditorium theaters and opera halls over rectangular shape because____.
It brings a greater audience closer to the speaker or sound source.It provides a large sitting capacity
2 MULTIPLE CHOICE OPTIONS
The implementation of standards of fire protection in the Philippines are governed by
Bureau of Fire Protection
3 MULTIPLE CHOICE OPTIONS
Evacuation and fire protection in high-rise buildings can be problematic because firefighting equipment cannot usually reach higher than:
75 ft (22 m)
3 MULTIPLE CHOICE OPTIONS
Exterior fire escapes are generally no longer permitted because:
smoke plumes rising from windows can render these devices unusable early in a fire
3 MULTIPLE CHOICE OPTIONS
The advantage of using inerting gas and clean-agent fire-suppression chemicals over water is that:
they can protect a building's contents, not just the structure
3 MULTIPLE CHOICE OPTIONS
for an electrical transformer, ___ remains constant
power capacity
3 MULTIPLE CHOICE OPTIONS
The most economical form of exterior transformer installation for individual buildings is:
mounted on a pole
3 MULTIPLE CHOICE OPTIONS
Dry type transformers shall be fitted with enclosures to protect from specific environmental challenges and degree of protection to person against access to hazardous parts. These enclosures are rated by NEMA relative to its use and purpose. What type of dry transformers are suited for outdoor applications?
Type 3 & 4
3 MULTIPLE CHOICE OPTIONS