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Book 2 PanGlobal Assessment Test > Chapter 8 Ventilation & Air Filters > Flashcards

Chapter 8 Ventilation & Air Filters Flashcards

1
Q

1.In the electronic filter dust particles are charged by passing the contaminated airflow through an ionizing zone formed by an arrangement of wires charged with _____ volts DC potential.

A. 13 000

B. 15 000

C. 10 000

D. 12 000

E. 60 000

A

A. 13 000

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2
Q
  1. In the electrostatic precipitator the positively charged dust particles are attracted to the metal _____ plates.

A. Grounded

B. Neutral

C. Collector

D. Ionizing

E. Parallel

A

C. Collector

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3
Q
  1. To ensure proper ventilation, new building codes require that a fresh air duct be connected to the _______ side of a heating furnace.

A. Exhaust

B. Blower discharge

C. Return

D. Combustion

E. Inlet and outlet

A

C. Return

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4
Q
  1. Actual ventilation rates vary from:

A. 0.14 to 2 m³/min (5 to 71 cfm)

B. 0.14 to 1.1 m³/min (5 to 40 cfm)

C. to 1.1 m³/min (3.5 to 40 cfm)

D. to 2 m³/min (3.5 to 71 cfm)

E. 1.4 to 11 m³/min (49 to 388 cfm)

A

B. 0.14 to 1.1 m³/min (5 to 40 cfm)

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5
Q
  1. The air velocity through a viscous filter of _____ is common.

A. 2.5 m/s (500 ft/min)

B. 4.0 m/s (800 ft/min)

C. 4.5 m/s (900 ft/min)

D. 2.0 m/s (400 ft/min)

E. 7.5 m/s (1500 ft/min)

A

A. 2.5 m/s (500 ft/min)

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6
Q
  1. Living organisms that must be removed from the air are:

A. Insects and pollen

B. Bacteria and spores

C. Bacteria and insects

D. Pollen and spores

E. Bacteria and pollen

A

B. Bacteria and spores

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7
Q
  1. In larger buildings, fans or blowers are used to _____ air into and _____ air from the building.

A. Supply stale, remove fresh

B. Remove fresh, supply stale

C. Supply fresh, remove fresh

D. Remove fresh, supply fresh

E. Supply fresh, remove stale

A

E. Supply fresh, remove stale

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8
Q
  1. The advantage of an all mechanical ventilation system is that the system supplies a controlled amount of _____ air and distributes it in such a way that any discomfort to the occupants is avoided.

A. Filtered and heated

B. Heated and humidified

C. Filtered and cooled

D. Cooled and dehumidified

E. Filtered and humidified

A

A. Filtered and heated

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9
Q
  1. The activated carbon will adsorb odour-causing gases up to about _____ of its own weight after which it has to be replaced.

A. 5%

B. 30%

C. 15%

D. 10%

E. 20%

A

E. 20%

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10
Q
  1. The best filters available for ventilation system lint removal are:

A. Charged-media electronic

B. Viscous impingement

C. Dry

D. Activated alumina chemisorbant

E. Air washer

A

C. Dry

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11
Q
  1. The system of mechanical air intake, natural exhaust keeps the pressure in the building slightly higher than atmospheric pressure and so prevents:

A. Ventilation

B. Humidification

C. Infiltration

D. Dehumidification

E. Drafts

A

C. Infiltration

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12
Q
  1. The admission of fresh air into a room should be such that:

A. The air is spread over the floor area

B. Stagnant pockets of air are created

C. The air strikes directly on the occupants

D. The air is spread over the ceiling area

E. Stagnant pockets of air are not created

A

E. Stagnant pockets of air are not created

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13
Q
  1. The system of mechanical air intake, natural exhaust can supply fresh air in all of the following ways except:

A. By a propeller fan mounted in the outside wall

B. By installing a fresh air supply duct in a warm air heating system

C. By unit ventilators that draw in a controlled amount of outside air

D. By an exhaust fan mounted in the outside wall

E. By use of a makeup air heater

A

D. By an exhaust fan mounted in the outside wall

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14
Q
  1. New building codes require to ensure proper ventilation with a heating furnace a fresh air duct be connected to the _____ side of the furnace.

A. Supply

B. Blower

C. Return

D. Plenum

E. Filte

A

C. Return

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15
Q
  1. The filter used in a warm air heating system will trap all except _____ airborne particle.

A. Dirt

B. Dust

C. Pollen

D. Lint

E. Smoke

A

E. Smoke

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16
Q
  1. One of the mechanical ventilation systems is the:

A. Natural air intake, mechanical exhaust

B. Natural air intake, forced exhaust

C. Forced air intake, mechanical exhaust

D. Forced air intake, natural exhaust

E. Forced air intake, forced exhaust

A

A. Natural air intake, mechanical exhaust

17
Q
  1. One of the basic methods of ventilation is:

A. Ventilation draft

B. Mechanical draft

C. Forced draft

D. Induced draft

E. Balanced draft

A

B. Mechanical draft

18
Q
  1. One of the mechanical ventilation systems is the:

A. Mechanical air intake, forced exhaust

B. Natural air intake, forced exhaust

C. Forced air intake, mechanical exhaust

D. Forced air intake, natural exhaust

E. Mechanical air intake, mechanical exhaust

A

E. Mechanical air intake, mechanical exhaust

19
Q
  1. One of the mechanical ventilation systems is the:

A. Mechanical air intake, forced exhaust

B. Natural air intake, forced exhaust

C. Forced air intake, mechanical exhaust

D. Mechanical air intake, natural exhaust

E. Forced air intake, forced exhaust

A

D. Mechanical air intake, natural exhaust

20
Q
  1. In the electrostatic precipitator the dust particles are charged by passing the contaminated airflow through an ionizing zone that _____ the particle.

A. Negatively charges

B. Positively charges

C. Neutrally charges

D. Ionizes

E. Fluidizes

A

B. Positively charges

21
Q
  1. The advantage of an all mechanical ventilation system is that the system supplies a controlled amount of _____ air and distributes it in such a way that any discomfort to the occupants is avoided.

A. Filtered and heated

B. Heated and humidified

C. Filtered and cooled

D. Cooled and dehumidified

E. Filtered and humidified

A

A. Filtered and heated

22
Q
  1. The viscous impingement filter contains filter media of tightly packed glass fibre, copper or aluminum wool, crimped metal, etc., that is coated with a _____ fluid.

A. Oily

B. Glue like

C. Vegetable oil

D. Petroleum oil

E. Viscous or sticky

A

E. Viscous or sticky

23
Q
  1. What precaution must be provided when using ultraviolet lighting for sterilizing air in ventilation systems?

A. Correct supply voltage

B. Safety glasses

C. Sufficient number of units

D. Positioning the lamps so the rays cannot hit occupants

E. Used only in unoccupied areas

A

D. Positioning the lamps so the rays cannot hit occupants

24
Q
  1. The natural air intake mechanical exhaust system of ventilation has the disadvantage that the fresh air drawn into the building through windows:

A. Is fresh air

B. Is neither filtered nor heated

C. Is natural and no power is required

D. Enters silently

E. Provides a cooling breeze

A

B. Is neither filtered nor heated

25
Q
  1. The _____ filter is the best filter available for the removal of fine dust, smoke, and fumes.

A. Electronic

B. Viscous impingement

C. Electrostatic

D. Mechanical

E. Dry

A

C. Electrostatic

Book 2 PanGlobal Assessment Test (40 decks)

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