Atsc 113 Exam Review Questions and A+ Level pass rate
solutions; Latest 2025/2026
What is the simplest stability and what does it depend on? - correct answer Static
Stability. It depends only on the temperature layering in the atmosphere, not on the
wind.
Https://www.eoas.ubc.ca/courses/atsc113/flying/met_concepts/03-met_concepts/03b-
static-stability/
What does it mean to have a positive S, a negative S, or a zero S? - correct answer If
S is positive, then it is statically stable, and the air becomes non-turbulent (if no wind
shear exists)
If S is zero, then it is statically neutral (neither stable nor unstable)
If S is negative, then it is statically unstable, and the air becomes turbulent
What are the conditions required for stable, unstable, and neutral conditions? - correct
answer https://www.eoas.ubc.ca/courses/atsc113/flying/met_concepts/03-
met_concepts/03b-static-stability/
What are two measures of thunderstorms? - correct answer CAPE and K index
Https://www.eoas.ubc.ca/courses/atsc113/flying/met_concepts/03-met_concepts/03b-
static-stability/
What is a sounding? - correct answer Measure of weather conditions (temperature,
wind, etc.) At many different heights
Https://www.eoas.ubc.ca/courses/atsc113/flying/met_concepts/03-met_concepts/03b-
static-stability/
,What is a dry line? - correct answer The boundary between dry and humid air of
virtually the same temperature
Https://www.eoas.ubc.ca/courses/atsc113/flying/met_concepts/03-met_concepts/03h-
frontal_hazards/
What is a squall line? - correct answer Line of thunderstorms not along a front.
Https://www.eoas.ubc.ca/courses/atsc113/flying/met_concepts/03-met_concepts/03h-
frontal_hazards/
What are the two flavours of occluded fronts? - correct answer Warm occlusions and
cold occlusions.
Above Ground Level (AGL) - correct answer lowest cloud base that is below 20 000ft
that is covering more than half the sky (broken or overcast)
Broken Coverage - correct answer 6-9 oktas
Ceiling - correct answer the altitude of cloud base for the lowest cloud with coverage ≥
5 oktas (i.e. Lowest broken or overcast clouds) is considered the ceiling, If a layer of
clouds covers more than half the sky
WMO - correct answer World Meteorological Organization
IFR - correct answer Instrument Flight Rules. Rules governing the procedures for
conducting instrument flight.
Cloud Base is less than 1000ft AGL and visibility is less than 3SM
Oktas - correct answer A measure of cloud cover.
Overcast - correct answer covered with clouds 8oktas
, Vertical Visibility - correct answer there are such poor visibilities at ground level that a
ground-based weather observer cannot see whether there are any clouds or not, then
ceiling is reported as the vertical visibilitywm
VFR - correct answer Visual Flight Rules. Rules that govern the procedures for
conducting flight under visual conditions.
Cloud base is more than 3000ft and visibility is more than 5SM
Cirrostratus clouds - correct answer clouds that form a high, transparent veil
Horizontal Visibility - correct answer is a measure of how far away you can see a black
object during daytime, or how far away you can see a bright light at night. It is measured
as a distance
Runway Visual Range (RVR) - correct answer the horizontal distance a pilot will see
down the runway from the approach end
What happens when VFR pilots fly into clouds? - correct answer they are not able to
determine if the aircraft is rightside up
They lose track of where they are
They panic
Marginal VFR - correct answer Conditions for which VFR is allowed, but for which
visibility is poor and/or cloud-base is low
Cloud base is between 1000ft and 3000ft AGL
Visibility is between 3 and 5 SM
Atmospheric Stability - correct answer refers to whether the air will stay or become
turbulant.
solutions; Latest 2025/2026
What is the simplest stability and what does it depend on? - correct answer Static
Stability. It depends only on the temperature layering in the atmosphere, not on the
wind.
Https://www.eoas.ubc.ca/courses/atsc113/flying/met_concepts/03-met_concepts/03b-
static-stability/
What does it mean to have a positive S, a negative S, or a zero S? - correct answer If
S is positive, then it is statically stable, and the air becomes non-turbulent (if no wind
shear exists)
If S is zero, then it is statically neutral (neither stable nor unstable)
If S is negative, then it is statically unstable, and the air becomes turbulent
What are the conditions required for stable, unstable, and neutral conditions? - correct
answer https://www.eoas.ubc.ca/courses/atsc113/flying/met_concepts/03-
met_concepts/03b-static-stability/
What are two measures of thunderstorms? - correct answer CAPE and K index
Https://www.eoas.ubc.ca/courses/atsc113/flying/met_concepts/03-met_concepts/03b-
static-stability/
What is a sounding? - correct answer Measure of weather conditions (temperature,
wind, etc.) At many different heights
Https://www.eoas.ubc.ca/courses/atsc113/flying/met_concepts/03-met_concepts/03b-
static-stability/
,What is a dry line? - correct answer The boundary between dry and humid air of
virtually the same temperature
Https://www.eoas.ubc.ca/courses/atsc113/flying/met_concepts/03-met_concepts/03h-
frontal_hazards/
What is a squall line? - correct answer Line of thunderstorms not along a front.
Https://www.eoas.ubc.ca/courses/atsc113/flying/met_concepts/03-met_concepts/03h-
frontal_hazards/
What are the two flavours of occluded fronts? - correct answer Warm occlusions and
cold occlusions.
Above Ground Level (AGL) - correct answer lowest cloud base that is below 20 000ft
that is covering more than half the sky (broken or overcast)
Broken Coverage - correct answer 6-9 oktas
Ceiling - correct answer the altitude of cloud base for the lowest cloud with coverage ≥
5 oktas (i.e. Lowest broken or overcast clouds) is considered the ceiling, If a layer of
clouds covers more than half the sky
WMO - correct answer World Meteorological Organization
IFR - correct answer Instrument Flight Rules. Rules governing the procedures for
conducting instrument flight.
Cloud Base is less than 1000ft AGL and visibility is less than 3SM
Oktas - correct answer A measure of cloud cover.
Overcast - correct answer covered with clouds 8oktas
, Vertical Visibility - correct answer there are such poor visibilities at ground level that a
ground-based weather observer cannot see whether there are any clouds or not, then
ceiling is reported as the vertical visibilitywm
VFR - correct answer Visual Flight Rules. Rules that govern the procedures for
conducting flight under visual conditions.
Cloud base is more than 3000ft and visibility is more than 5SM
Cirrostratus clouds - correct answer clouds that form a high, transparent veil
Horizontal Visibility - correct answer is a measure of how far away you can see a black
object during daytime, or how far away you can see a bright light at night. It is measured
as a distance
Runway Visual Range (RVR) - correct answer the horizontal distance a pilot will see
down the runway from the approach end
What happens when VFR pilots fly into clouds? - correct answer they are not able to
determine if the aircraft is rightside up
They lose track of where they are
They panic
Marginal VFR - correct answer Conditions for which VFR is allowed, but for which
visibility is poor and/or cloud-base is low
Cloud base is between 1000ft and 3000ft AGL
Visibility is between 3 and 5 SM
Atmospheric Stability - correct answer refers to whether the air will stay or become
turbulant.
