Illumination System Controls Quiz
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Questions and Answers

What is the primary function of timed switches?

  • To adjust the brightness of lights based on natural light
  • To automatically turn lights on based on occupancy
  • To turn lights off after a predetermined time interval (correct)
  • To manually turn lights off after use

    • Which of the following is a common application of photo cell controls?

  • Turning exterior lights on at sunset and off at sunrise (correct)
  • Dimming lights during the day for energy conservation
  • Regulating temperature based on sunlight levels
  • Indoor lighting adjustment based on activity

    • How do dimmers conserve electricity?

  • By turning the lights completely off
  • By removing excess bulbs from a lighting fixture
  • By adjusting electric lighting output based on natural light (correct)
  • By reducing the amount of natural light available

    • What is a potential consequence of not maintaining lighting fixtures regularly?

    <p>Reduced light quality due to dust accumulation</p> Signup and view all the answers

    Why should bulbs be replaced when they first begin to dim?

    <p>To maintain consistent illumination levels</p> Signup and view all the answers

    What is one reason that lighting systems require maintenance?

    <p>Dirt accumulation hinders light output</p> Signup and view all the answers

    What kind of lamps can dimmers be used with?

    <p>Incandescent, fluorescent, and HID lamps</p> Signup and view all the answers

    What should be done when lighting systems are over designed?

    <p>Dirt accumulation is less critical</p> Signup and view all the answers

    What procedure can be adopted to enhance the efficiency of a lighting system?

    <p>Regularly clean fixtures to prevent dust buildup</p> Signup and view all the answers

    What factor is important for the operation of a photocell?

    <p>It must be cleaned periodically</p> Signup and view all the answers

    What is the primary function of a circuit breaker?

    <p>To protect the circuit against overload</p> Signup and view all the answers

    What distinguishes the A.C. Snap Switch from the circuit breaker?

    <p>It is designed for manual 'ON-OFF' control</p> Signup and view all the answers

    Which feature allows low voltage remote control systems to be more flexible compared to A.C. Snap Switches?

    <p>Automatic control through various means</p> Signup and view all the answers

    What limitation does a time clock have regarding its operating schedule?

    <p>It is not designed for frequent schedule changes</p> Signup and view all the answers

    What is necessary for a low voltage switch to operate effectively?

    <p>A power supply transformer</p> Signup and view all the answers

    When considering installation, which factor may favor low voltage systems despite their higher equipment costs?

    <p>Lower wiring costs</p> Signup and view all the answers

    How does the A.C. Snap Switch allow electricity savings?

    <p>Through manual operation by occupants</p> Signup and view all the answers

    What is a common application of a time clock in lighting control?

    <p>To schedule automatic 'ON-OFF' times</p> Signup and view all the answers

    What characteristic of the A.C. Snap Switch makes it suitable for retrofitting?

    <p>It is a low-cost and simple device</p> Signup and view all the answers

    Which statement is true about the A.C. Snap Switch's operation and effectiveness?

    <p>Its efficiency depends on occupant awareness</p> Signup and view all the answers

    What is the primary function of lighting controls?

    <p>To switch the lighting system on or off</p> Signup and view all the answers

    When is it most beneficial to use extensive lighting controls?

    <p>In spaces where lights can be turned off at times</p> Signup and view all the answers

    What are two factors that can be varied to save energy in lighting systems?

    <p>Duration of usage and power allocation</p> Signup and view all the answers

    How often should lamps be cleaned to ensure maximum efficiency?

    <p>At regular intervals</p> Signup and view all the answers

    What consideration should be taken when selecting a control system for a space?

    <p>The intended use of the space</p> Signup and view all the answers

    Which factor necessitates more frequent cleaning of lamps?

    <p>Exposure to a dusty atmosphere</p> Signup and view all the answers

    Which control system is considered the most common for lighting?

    <p>Circuit breaker control</p> Signup and view all the answers

    What effect do light colors have on lighting efficiency compared to dark colors?

    <p>Light colors reflect more light</p> Signup and view all the answers

    Where should control devices be placed to enhance user convenience?

    <p>At each entrance of a room</p> Signup and view all the answers

    What might be a reason to turn lights off despite a minimal reduction in lamp life?

    <p>To reduce lamp replacement costs</p> Signup and view all the answers

    What is an effective color choice for walls and ceilings to improve light quality?

    <p>Bright yellow or white</p> Signup and view all the answers

    What is an advantage of switching individual work areas in large rooms separately?

    <p>It allows customized lighting for different tasks</p> Signup and view all the answers

    In what scenario can lamp removal still maintain existing light levels?

    <p>By only using brighter color schemes</p> Signup and view all the answers

    What should be done alongside repainting walls and ceilings to improve lighting efficiency?

    <p>Consider lamp removal and replacement</p> Signup and view all the answers

    Which of the following is NOT a consideration when selecting a lighting control?

    <p>Color preference of lights</p> Signup and view all the answers

    What can be concluded about the importance of controls in lighting systems?

    <p>They can significantly reduce electricity usage</p> Signup and view all the answers

    What maintenance activity should be performed frequently in rooms that use natural daylight?

    <p>Washing windows</p> Signup and view all the answers

    How much more efficient can a lighting system be in a light-colored area compared to a dark one?

    <p>It can be twice as efficient</p> Signup and view all the answers

    What is a recommended frequency for cleaning ceilings, walls, and floors?

    <p>Frequently to improve reflectivity</p> Signup and view all the answers

    Why is it advisable to use lighter colors for renovations?

    <p>They improve the light quality</p> Signup and view all the answers

    What is a limitation of timed switches in terms of their operational scheduling?

    <p>They can only be set for one specific time length.</p> Signup and view all the answers

    Which maintenance practice is crucial for ensuring the efficiency of fluorescent fixtures?

    <p>Regular dusting and cleaning.</p> Signup and view all the answers

    Which factor is NOT directly related to the operation of a photocell?

    <p>The brightness of connected lamps.</p> Signup and view all the answers

    Which statement best describes the use of dimmers in lighting systems?

    <p>Dimmers reduce electricity usage by varying illumination levels.</p> Signup and view all the answers

    What is a necessity for the proper functioning of a lighting maintenance program?

    <p>Regularly checking for dirt accumulation.</p> Signup and view all the answers

    How does the performance of a lamp change due to a lack of maintenance?

    <p>It can distribute significantly fewer lumens over time.</p> Signup and view all the answers

    In what way can a photocell enhance energy efficiency in a lighting system?

    <p>By sensing natural light and reducing electric output.</p> Signup and view all the answers

    What is the primary function of dimmers when used in conjunction with photocells?

    <p>To reduce the output of electric lighting when natural light is sufficient.</p> Signup and view all the answers

    Which of the following is a common drawback of poorly planned lighting systems?

    <p>They provide excessive illumination regardless of efficiency.</p> Signup and view all the answers

    Which color scheme is associated with improving the efficiency of lighting systems?

    <p>White or light colors</p> Signup and view all the answers

    What is the suggested cleaning frequency for lamps in a dusty environment compared to those in a clean environment?

    <p>More frequent for dusty environments</p> Signup and view all the answers

    How does the color choice for walls and ceilings impact a lighting system's efficiency?

    <p>Lighter colors can make systems twice as efficient</p> Signup and view all the answers

    What is an additional measure alongside repainting that can enhance lighting efficiency?

    <p>Removing existing lamps</p> Signup and view all the answers

    In areas utilizing natural daylight, what maintenance task is specifically recommended?

    <p>Cleaning the windows frequently</p> Signup and view all the answers

    Which aspect affects how much light is absorbed or reflected by a surface?

    <p>The color of the surface</p> Signup and view all the answers

    What may a room owner do to maintain existing light levels without increasing energy use?

    <p>Use lower wattage lamps and brighten color scheme</p> Signup and view all the answers

    Which aspect is most crucial in determining the control system for a space?

    <p>The convenience of occupants to access controls</p> Signup and view all the answers

    What is the effect of a predominantly dark area on a lighting system’s efficiency?

    <p>Reduces lighting efficiency</p> Signup and view all the answers

    Which cleaning procedure should be prioritized to improve reflective qualities in a room?

    <p>Cleaning the walls and ceilings frequently</p> Signup and view all the answers

    What is the primary benefit of controlling the length of time that power is used in lighting?

    <p>To save electricity and conserve energy</p> Signup and view all the answers

    What type of hue is effective in enhancing the light quality of a room aside from white?

    <p>Any lighter and more brilliant hue</p> Signup and view all the answers

    Which type of lighting control is most commonly used for an 'ON-OFF' function?

    <p>Circuit breaker control</p> Signup and view all the answers

    In what situation might extensive controls for lighting be least beneficial?

    <p>In a computer center operating 24 hours a day</p> Signup and view all the answers

    Which is a consequence of frequently turning lamps 'on' and 'off'?

    <p>Slightly reduced life of the lamps</p> Signup and view all the answers

    What is a key factor when establishing requirements for control devices?

    <p>Operational needs of the building</p> Signup and view all the answers

    When is it advantageous to have multiple control devices located at exits?

    <p>To facilitate easy control when leaving the area</p> Signup and view all the answers

    What must be considered in relation to lamp replacement costs in energy studies?

    <p>They have decreased relative importance in recent studies</p> Signup and view all the answers

    What typically dictates the selection of an appropriate control device?

    <p>The intended use of the space</p> Signup and view all the answers

    Which lighting control strategy may allow for energy savings in occupied large rooms?

    <p>Controlling individual work areas separately</p> Signup and view all the answers

    What is the primary purpose of a circuit breaker in a lighting system?

    <p>To protect the circuit against overload</p> Signup and view all the answers

    Which feature distinguishes the A.C. Snap Switch from the low voltage remote control?

    <p>It directly switches power to the fixture</p> Signup and view all the answers

    How does the operation of a time clock differ from manual lighting controls?

    <p>It operates lights based on predetermined schedules</p> Signup and view all the answers

    What aspect of low voltage remote control systems may offset their higher costs in existing buildings?

    <p>Reduced wiring expenses</p> Signup and view all the answers

    Why might an A.C. Snap Switch be less effective in promoting energy savings?

    <p>It relies on user initiative for operation</p> Signup and view all the answers

    What limitation does the low voltage remote control system have compared to direct switches?

    <p>Need for additional low voltage transformers</p> Signup and view all the answers

    How frequently should the time clock settings be adjusted according to its intended use?

    <p>Only as needed since frequent changes are not ideal</p> Signup and view all the answers

    What characteristic of a low voltage switch allows it to control multiple loads effectively?

    <p>It uses a relay system for indirect control</p> Signup and view all the answers

    What factor primarily limits the use of a time clock in facilities that require variable schedules?

    <p>Its reliance on preset timing rather than adjustments</p> Signup and view all the answers

    What important requirement must be met for effective use of a low voltage remote control system?

    <p>It requires a control power transformer</p> Signup and view all the answers

    Study Notes

    Illumination System Controls

    • Controls are switching devices that manually or automatically activate lighting systems. They can vary power input to meet specific needs.
    • Factors affecting energy saving include the amount of power allocated and the duration the lights are on.
    • Controls should consider the space's use. Continuous use, such as a computer center, doesn't benefit from extensive controls. Spaces with periods of inactivity could be controlled to reduce energy consumption.
    • Individual controls for work areas in large rooms allow some people to keep lights on while areas are unoccupied. This allows for more individual control over the lighting.
    • Control devices at each entrance in rooms with multiple exits encourage use (turning lights off on leaving).

    Control Systems

    • Circuit breaker controls are common on/off switches, but aren't intended for regular use as a switching mechanism; rather, it protects against circuit overload. The panel board may not allow occupants to directly control lighting.
    • AC Snap Switches are low cost manual on/off switches that operate directly at the electrical power line voltage.
    • Low Voltage Remote Control Systems require a transformer to control relays. These allow for remote, automatic, or manual control, which may offset higher equipment costs with lower wiring costs.
    • Time Clock Controls automatically turn lights on or off at scheduled times. These are useful for spaces with predictable use patterns or for exterior lighting.
    • Timed Switches turn lights on and off after a set time interval (5 minutes to 12 hours). They are useful in areas where occupants may forget to switch off lights, such as toilets or less frequently used spaces.
    • Photocell Controls turn lights on/off based on available light levels. They can automatically adjust dimmer settings and are commonly used for exterior lighting, adjusting based on sunsets and sunrises.

    Maintenance

    • Lamp maintenance, including cleaning, is essential to maintain system efficiency. Dust and other debris can significantly reduce light output.
    • Regular cleaning and maintaining reflective surfaces of ceilings and walls improve the system's efficiency.
    • Light colors reflect more light than dark colors, so walls and ceilings painted light colors can increase the overall efficient of the system.

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    Description

    Test your knowledge on the various types of illumination system controls and their energy-saving capabilities. This quiz covers switching devices, control strategies for different spaces, and the use of circuit breakers. Assess how well you understand the importance of lighting controls in energy efficiency.

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