Book 2: 1-08 - "Ventilation & Air Filters" Flashcards
One of the basic methods of ventilation is:
Select one:
A. Balanced draft
B. Induced draft
C. Forced draft
D. Natural draft
E. Ventilation draft
D. Natural draft
One of the mechanical ventilation systems is the:
Select one:
A. Forced air intake, natural exhaust
B. Mechanical air intake, forced exhaust
C. Forced air intake, mechanical exhaust
D. Mechanical air intake, mechanical exhaust
E. Natural air intake, forced exhaust
D. Mechanical air intake, mechanical exhaust
In larger buildings, fans or blowers are used to _____ air into and _____ air from the building.
Select one:
A. Supply stale, remove fresh
B. Supply fresh, remove fresh
C. Supply fresh, remove stale
D. Remove fresh, supply fresh
E. Remove fresh, supply stale
C. Supply fresh, remove stale
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.
Select one:
A. Heated and humidified
B. Cooled and dehumidified
C. Filtered and cooled
D. Filtered and humidified
E. Filtered and heated
E. Filtered and heated
One of the basic methods of ventilation is:
Select one:
A. Induced draft
B. Balanced draft
C. Forced draft
D. Ventilation draft
E. Mechanical draft
E. Mechanical draft
The admission of fresh air into a room should be such that:
Select one:
A. The air is spread over the ceiling area
B. The air strikes directly on the occupants
C. The air is spread over the floor area
D. Stagnant pockets of air are not created
E. Stagnant pockets of air are created
D. Stagnant pockets of air are not created
The contaminants suspended in the air include the following except:
Select one:
A. Gases like nitrogen
B. Solid particles of visible size
C. Solid particles of microscopic size
D. Liquid impurities
E. Living organisms
A. Gases like nitrogen
Living organisms that must be removed from the air are:
Select one:
A. Bacteria and pollen
B. Pollen and spores
C. Bacteria and spores
D. Insects and pollen
E. Bacteria and insects
C. Bacteria and spores
The air velocity through a viscous filter of _____ is common.
Select one:
A. 4.5 m/s (900 ft/min)
B. 4.0 m/s (800 ft/min)
C. 2.0 m/s (400 ft/min)
D. 2.5 m/s (500 ft/min)
E. 7.5 m/s (1500 ft/min)
D. 2.5 m/s (500 ft/min)
One of the mechanical ventilation systems is the:
Select one:
A. Forced air intake, natural exhaust
B. Forced air intake, mechanical exhaust
C. Forced air intake, forced exhaust
D. Natural air intake, mechanical exhaust
E. Natural air intake, forced exhaust
D. Natural air intake, mechanical exhaust
The admission of fresh air into a room should be such that:
Select one:
A. The air does not strike directly on the occupants
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. The air is spread over the floor area
A. The air does not strike directly on the occupants
The admission of fresh air into a room should be such that:
Select one:
A. The air is spread over the ceiling area
B. The air is spread over the floor area
C. The air strikes directly on the occupants
D. The air is spread evenly over the whole area
E. Stagnant pockets of air are created
D. The air is spread evenly over the whole area
Actual ventilation rates vary from:
Select one:
A. 0.1 to 2 m³/min (3.5 to 71 cfm)
B. 0.14 to 2 m³/min (5 to 71 cfm)
C. 0.1 to 1.1 m³/min (3.5 to 40 cfm)
D. 1.4 to 11 m³/min (49 to 388 cfm)
E. 0.14 to 1.1 m³/min (5 to 40 cfm)
E. 0.14 to 1.1 m³/min (5 to 40 cfm)
The filter used in a warm air heating system will trap all except _____ airborne particle.
Select one:
A. Dirt
B. Dust
C. Smoke
D. Pollen
E. Lint
C. Smoke
The process used to maintain the temperature at a reasonable level, supply fresh, clean air into the occupied areas and to remove the stale used air is called:
Select one:
A. Humidification
B. Heating
C. Ventilation
D. Filtration
E. Cooling
C. Ventilation
One of the mechanical ventilation systems is the:
Select one:
A. Forced air intake, forced exhaust
B. Mechanical air intake, forced exhaust
C. Natural air intake, forced exhaust
D. Mechanical air intake, natural exhaust
E. Forced air intake, mechanical exhaust
D. Mechanical air intake, natural exhaust
What precaution must be provided when using ultraviolet lighting for sterilizing air in ventilation systems?
Select one:
A. Used only in unoccupied areas
B. Correct supply voltage
C. Positioning the lamps so the rays cannot hit occupants
D. Sufficient number of units
E. Safety glasses
C. Positioning the lamps so the rays cannot hit occupants
To ensure proper ventilation, new building codes require that a fresh air duct be connected to the _______ side of a heating furnace.
Select one:
A. Return
B. Inlet and outlet
C. Combustion
D. Exhaust
E. Blower discharge
A. Return
In the electrostatic precipitator the dust particles are charged by passing the contaminated airflow through an ionizing zone that _____ the particle.
Select one:
A. Positively charges
B. Neutrally charges
C. Ionizes
D. Fluidizes
E. Negatively charges
A. Positively charges
Activated alumina chemisorbant is particularly suitable for the removal of:
Select one:
A. CO
B. O2
C. H2S
D. CO2
E. N2
C. H2S
