NATE AC CORE MAIN EXAMINATION SET
QUESTIONS AND ANSWERS SURE A+
✔✔The higher the MERV rating of a filter-drier, the
A: More efficient the drier at absorbing moisture
B: Less efficient the drier at absorbing moisture
C: Smaller the particles the filter can entrap
D: MERV does not apply to filter-driers - ✔✔D: MERV does not apply to filter-driers
Minimum Efficiency Reporting Value - MERV ratings are used to rate the ability of an air
conditioning filter to remove dust from the air as it passes through the filter. MERV is a
standard used to measure the overall efficiency of a filter. Higher MERV ratings mean
fewer dust particles and other airborne contaminants pass through the filter. Filters with
a merv rating of 9 to 12 are used in commercial and industrial applications and will stop
particles in the 1 to 3 micron range. These filters are a great choice for home owners
who want the best dust control possible. When using filters with Merv 9 ratings and
above it is important to clean or replace them when recommended by the manufacturer
because they will have a negative effect on air flow when they become dirty. This can
lead to performance problems and decreased operating efficiency. The most efficient
, filters have merv ratings of 13 to 16 and will stop particles as small as .3 microns. These
filters are used in hospitals and other super clean environments.
✔✔Zeolite is used with
A: Refrigerant filter-driers
B: HEPA filters
C: Pipe threads
D: Solder - ✔✔A: Refrigerant filter-driers
✔✔Vacuum pressures are measured in
A: Microns
B: Millimeters of mercury
C: Inches of mercury
D: All of the above - ✔✔D: All of the above
✔✔The number 25,400 relates to
A: Microns/inch
B: Btu/ton
C: Cfm/hp
D: Cfm/ton - ✔✔A: Microns/inch
✔✔The general rule of thumb for airflow is
A: 400 cfm/ton
B: 400 cfm/hp
C: 6 cfm/sq
D: 144 cfm/cu - ✔✔A: 400 cfm/ton
✔✔A double suction riser is used to
QUESTIONS AND ANSWERS SURE A+
✔✔The higher the MERV rating of a filter-drier, the
A: More efficient the drier at absorbing moisture
B: Less efficient the drier at absorbing moisture
C: Smaller the particles the filter can entrap
D: MERV does not apply to filter-driers - ✔✔D: MERV does not apply to filter-driers
Minimum Efficiency Reporting Value - MERV ratings are used to rate the ability of an air
conditioning filter to remove dust from the air as it passes through the filter. MERV is a
standard used to measure the overall efficiency of a filter. Higher MERV ratings mean
fewer dust particles and other airborne contaminants pass through the filter. Filters with
a merv rating of 9 to 12 are used in commercial and industrial applications and will stop
particles in the 1 to 3 micron range. These filters are a great choice for home owners
who want the best dust control possible. When using filters with Merv 9 ratings and
above it is important to clean or replace them when recommended by the manufacturer
because they will have a negative effect on air flow when they become dirty. This can
lead to performance problems and decreased operating efficiency. The most efficient
, filters have merv ratings of 13 to 16 and will stop particles as small as .3 microns. These
filters are used in hospitals and other super clean environments.
✔✔Zeolite is used with
A: Refrigerant filter-driers
B: HEPA filters
C: Pipe threads
D: Solder - ✔✔A: Refrigerant filter-driers
✔✔Vacuum pressures are measured in
A: Microns
B: Millimeters of mercury
C: Inches of mercury
D: All of the above - ✔✔D: All of the above
✔✔The number 25,400 relates to
A: Microns/inch
B: Btu/ton
C: Cfm/hp
D: Cfm/ton - ✔✔A: Microns/inch
✔✔The general rule of thumb for airflow is
A: 400 cfm/ton
B: 400 cfm/hp
C: 6 cfm/sq
D: 144 cfm/cu - ✔✔A: 400 cfm/ton
✔✔A double suction riser is used to
