Environmental Control Systems MCQs

Environmental Control Systems MCQs

Try to answer these 100+ Environmental Control Systems MCQs and check your understanding of the Environmental Control Systems subject.
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1: What is the definition of microclimate?

A.   A small climate

B.   The average weather conditions in an area

C.   Environmental conditions within a small area that differs significantly from the climate of the surrounding area

D.   Study of the world's climate

2: What is solar angle?

A.   The time of day when the Sun is highest in the sky

B.   The angle at which light from the Sun strikes the surface of Earth

C.   The name of a constellation

D.   The temperature of the Sun's surface

3: What is the angle in the horizontal plane between the north-south line and the vertical plane called?

A.   Right Ascension

B.   Altitude

C.   Azimuth

D.   Declination

4: Relative humidity is defined as the percentage of water vapor in the air compared to what?

A.   The maximum amount of water vapor that air can contain at a particular temperature

B.   The minimum amount of water vapor that air can contain at a particular temperature

C.   The average amount of water vapor in the air

D.   The amount of water vapor needed to saturate the air

5: What is a psychometric chart?

A.   A method of diagnosing mental illness

B.   A type of therapy

C.   A powerful graphic representation of temperature and relative humidity.

D.   A device that measures psychological attributes

6: What is the dry bulb temperature?

A.   The amount of heat needed to raise the temperature of one unit of dry air by one degree Celsius.

B.   The air temperature measured by the dry-bulb thermometer of a psychrometer.

C.   The air temperature measured by the wet-bulb thermometer of a psychrometer.

D.   The maximum amount of heat that air can hold at a particular temperature.

7: Which of the following is true about the wet-bulb temperature?

A.   The air temperature measured by the wet-bulb thermometer of a psychrometer.

B.   It is apsychrometric measurement.

C.   It is the humidity of the air.

D.   It is the same as the air temperature.

8: What is the DewPoint?

A.   The highest temperature at which dew can form.

B.   The temperature at which water vapour in the air becomes saturated and condensation begins.

C.   The lowest temperature at which dew can form.

D.   A unit of measure for humidity.

9: What is Thermal Radiation?

A.   The process of making something hot

B.   The process of making something cold

C.   Transfer of heat by the movement of molecules

D.   Heat transfer in the form of electromagnetic waves, including light

10: What is heat?

A.   A measure of the amount of work that can be done by a system

B.   A state of matter

C.   Energy that is transferred from one object to another

D.   Energy that flows from a point at one temperature to another point at a lower temperature

11: What is Latent Heat?

A.   The energy released or absorbed by a substance during a change of state that results in no change in temperature.

B.   The energy required for phase changes

C.   The energy released or absorbed by a system as the process of change occurs.

D.   None of the above.

12: What is enthalpy?

A.   The product of the sensible and latent heat of a substance

B.   The sum of the sensible and latent heat of a substance

C.   The sum of the solid and liquid heat of a substance

D.   The difference between the sensible and latent heat of a substance

13: What is the process whereby molecular excitation spreads through a substance or from one substance to another by direct contact called?

A.   Radiation

B.   Absorption

C.   Conduction

D.   Convection

14: What is the definition of resistance?

A.   The ability of a material to conduct electricity.

B.   A material's opposition to the flow of electric current.

C.   A material's opposition to the flow of electric charges.

D.   The physical force that opposes the flow of electrons in an electric circuit.

15: What is a thermal bridge?

A.   A device that is used to measure the thermal conductivity of a material

B.   A material that has a low thermal conductivity and is used to insulate

C.   A material that has a high thermal conductivity and is used to transfer heat

D.   A thermally conductive material that bypasses an insulation system, such as a metal fastener or stud.

16: What is the capacity of a material to store heat called?

A.   Fossil fuels

B.   Electricity

C.   Solar energy

D.   Thermal Mass

17: What is the definition of ventilation?

A.   The bringing in of fresh air to a building and the expelling of inside gasses.

B.   The art of breathing

C.   The study of air quality

D.   The regulation of temperature

18: What is the process by which water on the ground surface enters the soil?

A.   Condensation

B.   Precipitation

C.   Infiltration

D.   Evaporation

19: What is the thermal load?

A.   A unit of measurement for heat

B.   A factor used in calculating heating load

C.   The study of heat transfer

D.   Heat transferred from walls, doors, ceilings, etc.

20: Heat loss occurs from a building through which of the following?

A.   Convection, conduction, radiation

B.   Advection, abrasion, attrition

C.   Both of these

D.   None of these

21: What is the opposite of Heat Gain?

A.   Heat Receipt

B.   Cooling

C.   Heat Storage

D.   Heat Loss

22: What is the sum of the accumulation of heat from all sources called?

A.   Heat Gain

B.   Heat Loss

C.   Heat Transfer

D.   Heat

23: What is the definition of a passive system?

A.   A system that uses energy to create work

B.   Utilizing natural phenomena to change the climate of a building.

C.   A machine that produces energy

D.   Something that protects you from the sun

24: What is the name given to the solar energy being introduced directly into the space through ordinary fenestration?

A.   Direct Gain

B.   Solar Energy Through Fenestration

C.   Gain Through Fenestration

D.   Indirect Gain

25: What is a roof pond?

A.   A pond consisting of water contained within large plastic bags located on the roof of a building.

B.   A large body of water

C.   A small body of water

D.   A type of construction material

26: What is HVAC?

A.   Heating, Ventilation, Air Cooling

B.   Heating, Ventilation and Air Conditioning

C.   High Volume Air Conditioning

D.   Heavy Ventilation and Air Conditioning

27: What is the central location of a building's HVAC system called?

A.   Air handler

B.   Plant

C.   Central control unit

D.   HVAC system

28: What is a boiler?

A.   Equipment that provides hot water or steam for various uses (plumbing, heating, etc)

B.   A device for cooking food

C.   A device that generates electricity

D.   A device used to measure pressure

29: What is the name of the process that transfers heat from one location to another?

A.   Radiation

B.   Boiling

C.   Conduction

D.   Vapor Compression Refrigeration Cycle

30: What is a heat exchanger?

A.   A device that creates heat.

B.   A device that transfers energy from one substance to another.

C.   A device that transfers heat from one object to another.

D.   A device that transfers heat from one substance to another.

31: What is the purpose of a Distribution System?

A.   To clean the air

B.   To regulate temperature

C.   To recirculate treated air to the building

D.   To provide fresh air

32: What is a hydronic system?

A.   A system that uses electricity to transfer heat

B.   A heating/cooling system that uses water to transfer heat

C.   A system that uses solar panels to transfer heat

D.   A dry cleaning system

33: What is a duct?

A.   A tube or channel for conducting electricity.

B.   A tube or channel for conducting food.

C.   A tube or channel for conducting water.

D.   A tube or channel for conducting air.

34: What does HVAC stand for?

A.   High Volume Air Conditioning

B.   Home Ventilation and Air Conditioning

C.   Heating, Ventilating, and Air Conditioning

D.   Hawaii Vacation and Air Conditioning

35: What is a delivery system?

A.   A device that delivers water to a space.

B.   A device that delivers heat or cooling to the conditioned space.

C.   A device that delivers food to a space.

D.   A device that delivers air to a space.

36: What is a Multi-Zone?

A.   A country

B.   A central air-handling unit capable of serving 8 zones simultaneously

C.   A city

D.   A type of building

37: What type of system is a Unitary System?

A.   AHU and cooling compressor contained within a compact enclosure

B.   A manufacturing company that produces only one product

C.   A control system with one final control element per process variable

D.   A company that organizes its work force into departments based on processes

38: What is the degree day?

A.   The highest temperature

B.   The lowest temperature.

C.   The difference between the daily average temperature and a given temperature base.

D.   The average temperature

39: How is Payback Period calculated?

A.   By dividing expected yearly savings by the initial investment

B.   By multiplying initial investment by expected yearly savings

C.   By dividing initial investment by expected yearly savings

D.   By taking the square root of the initial investment by expected yearly savings

40: What is the definition of Adaption?

A.   Ability to adjust to various levels of light, see brightness of space in adaption level.

B.   The act of modifying something to suit a particular purpose.

C.   The process of acclimatization

D.   The process of becoming accustomed to a new climate

41: What are brightness patterns?

A.   Patterns of light and sound

B.   Patterns of light and movement

C.   Patterns of darkness and light

D.   Patterns of light and shadow

42: What is brightness?

A.   Percieved light amanting from an object

B.   The feeling of happiness and positivity

C.   A measure of how well light reflects off an object

D.   The distance from which an object is seen

43: Which of the following is not a characteristic of a Fluorescent lamp?

A.   Switching

B.   Efficacy

C.   Lamp Life

D.   Lumen Maintenance

44: What is the purpose of task lighting?

A.   To provide general lighting

B.   To provide light in specific areas for decoration

C.   To provide light in specific areas for tasks

D.   To provide light in specific areas for safety

45: What is the ratio of interior illuminance to available outdoor illuminance called?

A.   Available Outdoor Illuminance

B.   Daylighting Factor

C.   LED

D.   Interior Illuminance

46: What is diffuse reflection?

A.   Regular reflection of light

B.   Reflection of light from a smooth surface

C.   Mirrored reflection of light

D.   Reflection of light from a rough surface in many directions

47: What is the main purpose of using direct concentrated down lights?

A.   To reduce glare

B.   For more energy-efficient lighting

C.   For better lighting

D.   For privacy and dramatic effect

48: What is the cause of Direct Glare?

A.   Wind

B.   Light sources

C.   Objects in the way

D.   The sun

49: What is the main characteristic of direct lighting?

A.   High reflectance

B.   High efficiency

C.   Low energy

D.   Adjustable

50: What is disability glare?

A.   Something that impairs your vision if you have a disability

B.   A type of specialneeds glasses

C.   Luminance so intense that it impairs the vision.

D.   When someone with a disability becomes angry