HVAC 1 Final Exam Review Correct 100%(RATED A+)

Spiral wound gaskets are primarily used on - ANSWER high temperature high pressure systems lip type seals are used primarily - ANSWER on rotating shafts The side force applied at right angles to a bearing and shaft such as that applied from a pulley is called a - ANSWER radial load A type of anti-friction bearing is a - ANSWER ball bearing If there is darkened, yet still oily grease present on a failed bearing, a likely cause of failure is - ANSWER high loads or contaminants The viscosity of oil refers to the - ANSWER ability of the oil to flow at a specific temperature Grease often has some type of mineral or metal added to it such as - ANSWER lithium Some grease fittings use a safety vent to prevent seal damage due to - ANSWER over-pressurization A 5V750 belt has a width of - ANSWER 5/8" According to the RMA, belts up to 63" in length can be considered as matched if their compared length is within a tolerance of - ANSWER 0.150 inches A V-belt is marked as an AX42. The X means that it is a - ANSWER cogged belt After changing the pitch of a variable-pitch drive pulley, always - ANSWER check the current of the drive motor Which of the following illnesses result from a fungus that is found in soils throughout the world? - ANSWER Histoplasmosis The most current manifold gas pressure for LP gas burners is - ANSWER 11 in. w.c. The two conditions that can result in excessive pressure drop readings across the indoor coil are - ANSWER excessive air volume and a clogged coil The most durable hot surface igniters are made with - ANSWER silicon nitride The ignition device used in the system depicted in figure 3 is a - ANSWER hot-surface igniter natural draft furnace are no longer available for new installations because they are - ANSWER not energy efficient the ignition device used in they system depicted in figure 5 - ANSWER spark igniter