CBM Practice Test Questions with Correct Answers Graded A+

CBM Practice Test Questions with Correct Answers Graded A+. The most abundant gas in the atmosphere by volume is ---. This gas comprises 78% of the Earth Atmosphere by volume. A. Oxygen B. Argon C. Carbon Dioxide D. Nitrogen - Answer- D. Nitrogen The definition of a variable gas is a gas that varies significantly from time to time and place to place. The most significant variable gas by volume in the PBL is: A. Ozone B. Oxygen C. Water Vapor D. Carbon Dioxide - Answer- C. Water Vapor An isobar is a line of constant --- - Answer- Pressure Which of the following best explains how pressure decreases with height in the Earth's atmosphere? A. It decreases at a constant rate (linear) B. It decreases quickly at first then more gradually (Exponential) C. It decreases at a rate 9.8 mb/km D. It decreases in the troposphere, increases in the stratosphere, then decreases to the top of the atmosphere - Answer- B. It decreases quickly at first then more gradually (Exponential) In the vertical dimension, the upper level jet stream is located closest to which mandatory synoptic scale pressure level? A. The 850mb level (1,500 meters) B. The surface C. The 500mb level (5,500 meters) D. The 300mb level (9,500 meters) - Answer- D. The 300mb level (9,500 meters) The seasons of Spring, Summer, winter, and Fall are a direct result of which phenomenon? A. The sun's energy output and the Earth's proximity to the sun B. Shifting of ocean currents C. The 23.5° tilt of Earth from vertical D. The jet stream - Answer- C. The 23.5° tilt of Earth from vertical --- refers to the horizontal transport of air while --- is the vertical transport of air - Answer- Advection, convection Which of the following has the highest albedo and thus more reflected solar radiation? A. Fresh snow B. Grass C. Water D. Blacktop - Answer- A. Fresh snow Which of the following is NOT a primary "control: of climate? A. Altitude B. Latitude C. Daily Weather D. Ocean currents - Answer- C. Daily Weather Water has a --- heat capacity. This means a large amount of energy is needed the raise the temperature of water relative to other substances. - Answer- High A one degree temperature change on the F scale is equal to a --- degree change on the C scale - Answer- 1.8 Unsaturated air rises at the dry adiabatic lapse rate which is --- per kilometer. This is also the same numerical value as the gravitational force constant in meters per second squared. - Answer- 9.8 Which of the following processes absorbs the most latent heat? A. Melting B. Freezing C. Evaporation D. Condensation - Answer- C. Evaporation Which of the following processes will result in a greater dewpoint depression at the surface? The dewpoint depression is the difference between the temperature and the dewpoint. A. Wet-bulb cooling B. Saturating previously unsaturated air C. Radiational cooling D. Solar heating - Answer- D. Solar heating In which air mass would a rising parcel's slope at the moist adiabatic lapse rate be closest to the dry adiabatic lapse rate? The moist adiabatic lapse rate is not a constant. The most adiabatic lapse rate has a smaller slope than the dry adiabatic lapse rate if a parcel contains moisture. The amount of latent heat release depends on the temperature and moisture content of the air. A. Maritime tropical (warm and moist) B. Maritime polar (cool moist) C. Continental tropical (Hot and dry) D. Continental polar (cold and dry) - Answer- D. Continental polar (cold and dry) Which of the following generally has the smallest slope and is associated with light to moderate and widespread precipitation? This front is often found to the right of a mid-lat cyclone in North America A. Cold front B. Warm front C. Dryline D. Hurricane - Answer- B. Warm front Which of the following statements is false? A. Cloud droplets freeze once the temperature drops below 0°C B. The vapor pressure is higher over water than over ice C. The typical raindrop is about 2mm in diameter D. Salt particles make good CCN - Answer- A. Cloud droplets freeze once the temperature drops below 0°C The geostrophic wind is a balance between the PGF and ---. This balance causes air to flow nearly parallel to the height contours in the mid and upper levels of the atmosphere. - Answer- Coriolis When viewed from above the North Pole, the earth rotates --- and makes a complete turn in 24 hours. This causes low pressure to spin counterclockwise in the NH. - Answer- Counterclockwise The California current off the US West Coast is a --- ocean current while the Gulf Stream off the US East Coast is a --- ocean current. This helps lead to dry summers in California and relatively wet summers in the SE US. - Answer- Cold, Warm Which of the following is not conducive to lake effect snow: A. Continental polar air advecting over warm Great Lake waters B. Strong vertical directional and speed shear with positive LI's C. Orographic lift and frictional convergence D. Large temperature difference between lake and overriding cP air - Answer- B. Strong vertical directional and speed shear with positive LI's Where is the warm sector in reference to a developed mid-lat cyclone over the United States - Answer- To the southeast Rising motion due to vorticity and warm air advection are most commonly found to the -- - of the 500mb trough axis over the US - Answer- Right This type of fog that forms on nights with light wind, clear skies, low dew point depressions, and moist soils - Answer- Radiational fog Which of the following reasons explains why the stratosphere is absolutely stable? A. Air temperatures are too cold B. Air pressure is too low C. The absorption of radiant energy by ozone D. The wind speed is too strong - Answer- C. The absorption of radiant energy by ozone These clouds have some vertical development and are located in the upper levels of the atmosphere. The clouds have a lumpy appearance and are made of ice crystals. When viewed from the surface, each cloud element is about the size of a thumbnail - AnswerAltostratus How can virga cause the atmosphere to become increasingly unstable? A. It can release large amounts of latent heat B. It can cool the mid-levels of the atmosphere C. It can cause a warming of the PBL D. It can cause surface to 500mb CAA - Answer- B. It can cool the mid-levels of the atmosphere When the temperature is below freezing from the surface to 500mb, what precipitation type would you expect? - Answer- Snow The two weather disasters that result in the greatest loss of life are: - Answer- Floods and lightning Which of the following is true of a capping inversion? A. It can prevent thunderstorms from developing B. It can enhance thunderstorm activity due to heat and moisture buildup in the PBL C. It is a rapid temperature decrease with height above the PBL D. both a and b E. Both b and c - Answer- D. both a and b The air behind the FFD associated with strong thunderstorms consists of --- air while the RFD consists of relatively --- air - Answer- Cold/moist, warm/dry Which of the following states has the most frequent and largest hail of the four choices below? Why? A. Kansas. Many high CAPE days, freezing levels can be low B. Florida. Large number of thunderstorm days C. Michigan. High latitude, lake effect hail, many summer storms D. Oregon. Orographic lifting, many thunderstorm days, jet stream - Answer- A. Kansas. Many high CAPE days, freezing levels can be low Minimum tropical storm force wind is --- mph while the minimum hurricane force wind is --- mph. - Answer- 39, 74