Hvac Exam All Answers Correct

Hvac Exam All Answers Correct Sealing up even small openings in a building conserves energy because... it stops the infiltration of outside air or ex-filtration of comfortable conditioned inside air by way of convection currents Heat is easily transferred through windows and chimneys and not easily through insulation True Which of the following items would not be a part of a gas furnace forced air perimeter heating system? Boiler In a forced air heating system, a(n)... is a system of ducts that brings cold air back to the furnace from various rooms of the building Air return Select all the types of material that are satisfactory for duct work in a warm air perimeter system Sheet Metal Vitrified tile concrete pipe plastic pipe A manifold, found in many hydronic heating systems, is used only if... the building has zoned heating In an air cooling system, there are two coils through which refrigerant is circulated. One, called a ___(1)___ , absorbs heat from the warm air passing over it. The heated refrigerant is then pumped through another coil called a ___(2)___, where the refrigerant passes its collected heat to the atmosphere. 1. evaporator 2. condenser Testing has shown that in a modern home, indoor air should be exchanged with fresh outdoor air... every two to three hours A voluntary labeling program called ______ Star offered marketing advantages to manufacturers while alerting consumers to what products could save them money in operating costs. Energy (BAH) The author recommends that you do which of the following. Engage your HVAC subcontractor early in the design process. Make sure your design includes a central spot for the air-handling equipment Make sure there is plenty of room to run ducts. Even the best windows create conduction losses more than ____ times higher than walls. 10 The _____ furnace costs more, but you can use one over a crawl space or where ducts run under the slab. down-flow Selects the statements that are true about a horizontal furnace. Used primarily for attic and crawl space applications A larger and more efficient unit is required to offset energy losses that come with placing your furnace in an unconditioned space. Today, most residential cooling is supplied by a "_________" which consists of an outdoor condensing coil and compressor connected to an indoor evaporative coil with refrigerant tubing. split system Although heat pumps cost a few hundred dollars more than a standard air conditioner, they can save money when used in ______ climates. temperate Which of the following is (are) included in a package unit? Compressor Blower Coils Heater Which of the following is (are) included in heating calculations? Heat transferred through walls Heat transferred through windows Heat transferred through doors Heat transferred through ceilings Heat transferred through foundation You don't need to provide extra humidity during winter months because improved air-sealing techniques preserve indoor humidity. True Select the true statement about registers. Supply registers control the direction and throw of air into a room. What is the preferred material for supply ducts in conditioned spaces? Sheet metal A _____ system has a spiderweb-like distribution network of supply ducts running straight from the furnace to each outlet. This provides a direct method of air delivery that maintains balanced pressure throughout the system. radial It is both illegal and unwise to conceal ductwork in a bulkhead or chase. False Returns can work either actively or passively True _______-room returns generally run more quietly and afford more privacy. Multiple