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Quiz

1 - Building Controls

Jamie Hart 12 questions

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Questions in this quiz (12)

  1. 1A control system receives an [blank_start]input[blank_end] and [blank_start]transmits[blank_end] an [blank_start]output[blank_end].
    1. Ainput
    2. Boutput
    3. Ctransmits
  2. 2There are two types of control loop:
    - [blank_start]Basic[blank_end] [blank_start]manual[blank_end] - human adjustment
    - [blank_start]Single[blank_end] [blank_start]automatic[blank_end] - automatic adjustment
    1. ABasic
    2. Bmanual
    3. CSingle
    4. Dautomatic
  3. 3Control systems can be classified by:
    - [blank_start]Control[blank_end] [blank_start]theory[blank_end] (linear vs non-linear)
    - [blank_start]Mathematical[blank_end] [blank_start]techniques[blank_end] (frequency domain vs time domain)
    - [blank_start]Signal[blank_end] [blank_start]transmission[blank_end] (feed-forward/open loop vs feedback/closed loop)
    - [blank_start]Number[blank_end] of I/O (SIOS vs MIMO)
    1. AControl
    2. Btheory
    3. CMathematical
    4. Dtechniques
    5. ESignal
    6. Ftransmission
    7. GNumber
  4. 4Four types of components of block diagram:
    - [blank_start]Signals[blank_end]
    - [blank_start]System[blank_end]
    - [blank_start]Summing[blank_end] [blank_start]Junction[blank_end]
    - [blank_start]Pickoff[blank_end] [blank_start]Point[blank_end]
    1. ASignals
    2. BSystem
    3. CSumming
    4. DJunction
    5. EPickoff
    6. FPoint
  5. 5Main elements of a closed loop system:
    - [blank_start]Measure[blank_end] (Sensor)
    - [blank_start]Compare[blank_end] (Controller)
    - [blank_start]Compare[blank_end] (Actuators)
    - [blank_start]Correct[blank_end] (System)
    1. AMeasure
    2. BCompare
    3. CCompare
    4. DCorrect
  6. 6[blank_start]Two[blank_end] [blank_start]position[blank_end] control - FCE can either be on or off. Leads to continuous on and off switching - [blank_start]overshoot[blank_end] and [blank_start]undershoot[blank_end].
    1. ATwo
    2. Bposition
    3. Covershoot
    4. Dundershoot
  7. 7Modulating Control Modes:
    - [blank_start]Proportional[blank_end] - Output [blank_start]proportional[blank_end] to input ([blank_start]simple[blank_end], direct relationship, larger error)
    - [blank_start]Integral[blank_end] - Proportion to the [blank_start]deviation[blank_end] from the desired value ([blank_start]close[blank_end] control, removes offset, takes time, not for fast response)
    - [blank_start]Derivative[blank_end] - Proportional to the [blank_start]rate[blank_end] of [blank_start]change[blank_end] of the control variable ([blank_start]fast[blank_end] response, no long term)
    1. AProportional
    2. BIntegral
    3. CDerivative
    4. Dproportional
    5. Edeviation
    6. Frate
    7. Gchange
    8. Hfast
    9. Iclose
    10. Jsimple
  8. 8Space temp. - [blank_start]P[blank_end]
    Mixed air temp. - [blank_start]PI[blank_end]
    Coil discharge temp. - [blank_start]PI[blank_end]
    Chiller discharge temp. - [blank_start]PI[blank_end]
    Air flow. - [blank_start]PI[blank_end]
    Fan static pressure - [blank_start]PI[blank_end]
    Humidity - [blank_start]P[blank_end]
    Dewpoint - [blank_start]P[blank_end]
    1. AP
    2. BPI
    3. CPI
    4. DPI
    5. EPI
    6. FPI
    7. GP
    8. HP
  9. 9Valve authority = P1/(P1+P2)
    0 - 0.25: [blank_start]unstable[blank_end] to [blank_start]fair[blank_end]
    0.25 - 0.5: [blank_start]fair[blank_end] to [blank_start]good[blank_end]
    0.5 - 1: good
    1. Aunstable
    2. Bfair
    3. Cfair
    4. Dgood
  10. 10Valve type:
    - [blank_start]Linear[blank_end]
    - [blank_start]Equal[blank_end] percentage
    - [blank_start]Quick[blank_end] opening
    - [blank_start]Characterised[blank_end] [blank_start]V[blank_end] port
    - [blank_start]Ball[blank_end] valve
    1. ALinear
    2. BEqual
    3. CQuick
    4. DCharacterised
    5. EV
    6. FBall

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Description
Controls - Building Services
Language
English
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