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A set of multiple-choice questions and answers related to the tcfp driver operator exam. It covers topics such as fire apparatus, water properties, pressure principles, friction loss, and nozzle types. Useful for individuals preparing for the tcfp driver operator exam.
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Compared to full-size pumpers, initial attack fire apparatus have? a. Larger Chassis b. smaller chassis c. larger agent tank size d. the same chassis and agent tank size - ✔✔b When water converts to a gas, water vapor, or steam, the water: a. immediately dissipates so it is rarely visible b. changes to droplets that will fall back to the surface c. only become visible if the ambient air temp is above 40 degrees d. only becomes visible as it rises away from the surface of the liquid and it begins to condense. - ✔✔d Water may be used to smother fires in a combustible liquid a. when the liquid;s specific gravity is higher than 1 b. when the liquids specific gravity is less than 1 c. when the ambient air temp is below 32 d. when the ambient air temp is above 32 - ✔✔a Which statement about water curtains is MOST accurate a. radiant heat does not pass through water, so water curtains are very effective b. radiant heat easily passes through water, rendering water curtains in effective
c. radiant heat passes through water but with difficulty, so the effectiveness of water is difficult to determine d. Radiant heat passes through cold water but not warm water, so the effectiveness of water curtains depends on temp - ✔✔b The fourth principle of pressure states that the pressure of a liquid in an open vessel is a. proportional to its depth b. independent of its depth c. dependent upon the length of time in the vessel d. variable even when vessels remain the same. - ✔✔a The fifth principle of pressure states that the pressure of a liquid in an open vessel is a. variable for similar liquids b. independent of the shape of the vessel c. greater toward the outside the outside of the vessel d. proportional to the density of the liquid - ✔✔d The sixth principle of pressure states that the pressure of a liquid at the bottom of the vessel a. greater at the center b. independent of the shape of the vessel c. greater toward the outside of the vessel d. dependent upon the shape of the vessel - ✔✔b Why does the third principle of friction loss demonstrate the advantage of larger size hose a. for the same discharge, friction loss varies inversely as the second power of diameter of hose
a. cellar nozzle c. broken nozzle c. piercing nozzle d. chimney nozzle - ✔✔c When two hoselines of equal length are siamesed to supply a fire stream, friction loss is approximately a. the same as that of a single hoseline at the same nozzle pressure b. 25 percent less than that of a single hoseline at the same nozzle pressure c. 10 percent more than that of a single hoseline at the same nozzle pressure d. 50 percent less than that of s single hoseline at the same nozzle pressure - ✔✔b Which statement about adding unequal lengths of hose to an established wyed hose layout is MOST accurate a. friction loss must be determined for each attack line b. friction loss can be assumed to be the same for all attack lines c. friction loss only needs to be determined for the initial attack line d. friction loss in a wyed layout does not need to be considered - ✔✔a For which of the following is a nozzle pressure of 50 or 75 psi (350 or 525 kPa) a safe and efficient nozzle pressure a. fog nozzle b. low pressure fog nozzle c. Solid stream nozzle (handline) d. Solid stream nozzle (master stream) - ✔✔b When a pumper is being supplied by another pumper, net pump discharge pressure is the difference between pump discharge pressure and
a. outgoing pressure from supply source b. incoming pressure from a supply source c. average total pressure of both pumpers d. combined total pressure of both pumpers - ✔✔b Which statement about pump charts is MOST accurate a. they contain info that must be updated at least monthly for accuracy - ✔✔