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building services and environmental science

revision

building services and environmental science
60問 • 2年前revision
  • Alex Skipp
    • 通報

    問題一覧

  • 1

    Hot water from the condenser is cooled by

    Cooling tower

  • 2

    The change of state from liquid to a gas is called

    Evaporation

  • 3

    An air-conditioning system supplies full control of...

    Humidity /Air temperature

  • 4

    ___________ of heat transfer takes place in waveforms

    Radiation

  • 5

    The most likely comfortable range of relative humidity given below is

    45-65% RH

  • 6

    What factors restrict the use of natural ventilation

    Location, pollution, noise

  • 7

    Which of the following is NOT a result of inadequate or extreme ventilation

    Infiltration

  • 8

    Infiltration is a deliberate process aiming to assist ventilation

    False

  • 9

    At what point does water condense on surfaces

    Dew point

  • 10

    According to British Standards, which RH is regard as the upper limit of acceptable

    70%

  • 11

    Do occupants within a dwelling affect condensation levels

    Yes

  • 12

    Increasing temperature causes molecules to vibrate at _________ rate

    a faster

  • 13

    Reducing the temperature causes molecules to vibrate at a ________ rate

    Slower

  • 14

    Which answer below are the three basic modes of heat transfer

    Conduction, convection, radiation

  • 15

    What is the specific heat capacity of Cast Iron in SHC (J/kgK)

    460

  • 16

    What is the specific heat capacity of Carbon Steel in SHC (J/kgK)?

    490

  • 17

    Molecules stop vibrating at .

    -273.16 C

  • 18

    Psychometrics is the study of________and________of air and water mixtures

    Properties, behaviours

  • 19

    Human comfort has 2 main components which are

    Temperature and relative humidity

  • 20

    As the air temperature increases the amount of moisture___.

    Stays constant

  • 21

    Which one is not a dilution of pollutants?

    Nitrogen

  • 22

    Ventilation is a combination of____and_____.

    Infiltration, purpose ventilation.

  • 23

    Which of the below is Internal air temperature not directly dependent on

    Moisture content of the external air

  • 24

    Which of the below is Mean Internal Temperature (MIT) not dependant on

    External moisture content

  • 25

    What is the temperature in degrees Celsius of low temperature hot water

    70-100 C

  • 26

    What is the temperature in degrees Celsius of high temperature hot water

    120-150 C

  • 27

    Air-conditioning system provides full control of_____,______, and_______.

    Air temperature, humidity, cleanliness

  • 28

    What are the types of air-conditioning systems

    Centralised air, partially centralised and local systems

  • 29

    Increasing ventilation rate (from a poorly ventilated area) will normally:

    Reduce internal temperature

  • 30

    Condensation occurs at an RH of;

    100%

  • 31

    As air (db) temperature increases

    Ability to retain moisture increases

  • 32

    All new boilers in the UK are...

    Condensing boilers

  • 33

    How many KJ of energy is required to increase 1KG of water by 1 degree (Celsius)

    4.2KJ

  • 34

    What are the most common pollutants

    All of them

  • 35

    In a mixture of gases (like air) each different gas exerts its own pressure, this is known as its partial pressure. Is this statement true ?

    Yes

  • 36

    Ventilation is required for:

    All of them

  • 37

    Greater levels of thermal insulation lead to higher mean internal temperatures and lower internal relative humidity.

    True

  • 38

    Which one of the statements about sensible and latent heat is true.

    In the summer there are sensible and latent gains in a room.

  • 39

    Which factor isn’t a disadvantage in relation to air conditioning:

    Comfort

  • 40

    What is the specific heat capacity of water?

    4.2 kJ/kgK

  • 41

    Generally, increasing the ventilation rate from low levels…?

    reduces internal RH to an optimum level

  • 42

    The temperature at which condensation occurs is called the?

    Dew point

  • 43

    Which of the following types of air conditioning system is not a centralised air conditioning system?

    Split unit

  • 44

    The total volume flow rate to a space is calculated by?

    fresh air supplied + recirculated air

  • 45

    What is NOT a type of ventilation:

    Suction ventilation

  • 46

    The average VP of the internal air is NOT dependent upon what

    Internal temperature

  • 47

    Natural gas is mainly

    Ethane

  • 48

    Temperature is the measure of hotness or coldness of matter

    true

  • 49

    The kelvin scale is based upon absolute zero and is based upon sound scientific principles

    true

  • 50

    Heat is the energy flow between two objects at different temperatures

    true

  • 51

    what is convection

    The transfer of heat by the bodily movement of particles

  • 52

    Convection is what allows "the stack effect" the take place

    True

  • 53

    What is the quantity of Heat?

    Joule (j)

  • 54

    What is sensible heat?

    the input which is needed to rise temperature through conduction, convection or radiation

  • 55

    What is latent heat?

    When energy is supplied to a body at its melting or boiling point but there is no temperature change

  • 56

    What is relative humidity?

    the amount of water vapour content in the air

  • 57

    Which factor do Comfort cooling systems not control?

    Humidity

  • 58

    Which of the Following is true about Mechanical ventilation?

    Mechanical ventilation is controllable and can be localised or centralised with ducted distribution.

  • 59

    The ‘’thermal model’’ is used to predict the……………in a building.

    Mean Internal Temperature.

  • 60

    The above diagram 1 shows a Central plant system. What is the name of the part labelled 26?

    Cooling tower

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    問題一覧

  • 1

    Hot water from the condenser is cooled by

    Cooling tower

  • 2

    The change of state from liquid to a gas is called

    Evaporation

  • 3

    An air-conditioning system supplies full control of...

    Humidity /Air temperature

  • 4

    ___________ of heat transfer takes place in waveforms

    Radiation

  • 5

    The most likely comfortable range of relative humidity given below is

    45-65% RH

  • 6

    What factors restrict the use of natural ventilation

    Location, pollution, noise

  • 7

    Which of the following is NOT a result of inadequate or extreme ventilation

    Infiltration

  • 8

    Infiltration is a deliberate process aiming to assist ventilation

    False

  • 9

    At what point does water condense on surfaces

    Dew point

  • 10

    According to British Standards, which RH is regard as the upper limit of acceptable

    70%

  • 11

    Do occupants within a dwelling affect condensation levels

    Yes

  • 12

    Increasing temperature causes molecules to vibrate at _________ rate

    a faster

  • 13

    Reducing the temperature causes molecules to vibrate at a ________ rate

    Slower

  • 14

    Which answer below are the three basic modes of heat transfer

    Conduction, convection, radiation

  • 15

    What is the specific heat capacity of Cast Iron in SHC (J/kgK)

    460

  • 16

    What is the specific heat capacity of Carbon Steel in SHC (J/kgK)?

    490

  • 17

    Molecules stop vibrating at .

    -273.16 C

  • 18

    Psychometrics is the study of________and________of air and water mixtures

    Properties, behaviours

  • 19

    Human comfort has 2 main components which are

    Temperature and relative humidity

  • 20

    As the air temperature increases the amount of moisture___.

    Stays constant

  • 21

    Which one is not a dilution of pollutants?

    Nitrogen

  • 22

    Ventilation is a combination of____and_____.

    Infiltration, purpose ventilation.

  • 23

    Which of the below is Internal air temperature not directly dependent on

    Moisture content of the external air

  • 24

    Which of the below is Mean Internal Temperature (MIT) not dependant on

    External moisture content

  • 25

    What is the temperature in degrees Celsius of low temperature hot water

    70-100 C

  • 26

    What is the temperature in degrees Celsius of high temperature hot water

    120-150 C

  • 27

    Air-conditioning system provides full control of_____,______, and_______.

    Air temperature, humidity, cleanliness

  • 28

    What are the types of air-conditioning systems

    Centralised air, partially centralised and local systems

  • 29

    Increasing ventilation rate (from a poorly ventilated area) will normally:

    Reduce internal temperature

  • 30

    Condensation occurs at an RH of;

    100%

  • 31

    As air (db) temperature increases

    Ability to retain moisture increases

  • 32

    All new boilers in the UK are...

    Condensing boilers

  • 33

    How many KJ of energy is required to increase 1KG of water by 1 degree (Celsius)

    4.2KJ

  • 34

    What are the most common pollutants

    All of them

  • 35

    In a mixture of gases (like air) each different gas exerts its own pressure, this is known as its partial pressure. Is this statement true ?

    Yes

  • 36

    Ventilation is required for:

    All of them

  • 37

    Greater levels of thermal insulation lead to higher mean internal temperatures and lower internal relative humidity.

    True

  • 38

    Which one of the statements about sensible and latent heat is true.

    In the summer there are sensible and latent gains in a room.

  • 39

    Which factor isn’t a disadvantage in relation to air conditioning:

    Comfort

  • 40

    What is the specific heat capacity of water?

    4.2 kJ/kgK

  • 41

    Generally, increasing the ventilation rate from low levels…?

    reduces internal RH to an optimum level

  • 42

    The temperature at which condensation occurs is called the?

    Dew point

  • 43

    Which of the following types of air conditioning system is not a centralised air conditioning system?

    Split unit

  • 44

    The total volume flow rate to a space is calculated by?

    fresh air supplied + recirculated air

  • 45

    What is NOT a type of ventilation:

    Suction ventilation

  • 46

    The average VP of the internal air is NOT dependent upon what

    Internal temperature

  • 47

    Natural gas is mainly

    Ethane

  • 48

    Temperature is the measure of hotness or coldness of matter

    true

  • 49

    The kelvin scale is based upon absolute zero and is based upon sound scientific principles

    true

  • 50

    Heat is the energy flow between two objects at different temperatures

    true

  • 51

    what is convection

    The transfer of heat by the bodily movement of particles

  • 52

    Convection is what allows "the stack effect" the take place

    True

  • 53

    What is the quantity of Heat?

    Joule (j)

  • 54

    What is sensible heat?

    the input which is needed to rise temperature through conduction, convection or radiation

  • 55

    What is latent heat?

    When energy is supplied to a body at its melting or boiling point but there is no temperature change

  • 56

    What is relative humidity?

    the amount of water vapour content in the air

  • 57

    Which factor do Comfort cooling systems not control?

    Humidity

  • 58

    Which of the Following is true about Mechanical ventilation?

    Mechanical ventilation is controllable and can be localised or centralised with ducted distribution.

  • 59

    The ‘’thermal model’’ is used to predict the……………in a building.

    Mean Internal Temperature.

  • 60

    The above diagram 1 shows a Central plant system. What is the name of the part labelled 26?

    Cooling tower