ABSA 4B POWER ENGINEERING EXAM QUESTIONS WITH CORRECT VERIFIED ANSWERS | 100% PASS (A+ CERTIFIED

ABSA 4B POWER ENGINEERING EXAM QUESTIONS WITH CORRECT VERIFIED ANSWERS | 100% PASS (A+ CERTIFIEDIn a warm air heating system the cold air return registers are located a) in exterior walls b) in interior locations c) under windows d) in floors e) in ceilings Answer B The major disadvantage of an electric resistance coil furnace for warm air heating is a) the high cost of electricity b) the danger from electric shock c) the high cost of maintenance d) the large size of the furnace e) the location of electrical wiring Answer A Lowboy furnaces are just over a) 1.0 m in height b) 0.8 m in height c) 1.4 m in height d) 1.6 m in height e) 1.2 m in height Answer E The advantage of having duct furnaces instead of a large central furnace is a) less initial cost b) easier installation c) better control of heat in each zone of the building d) that they require less space e) lower maintenance costs Answer C The power supply for an electric resistance coil furnace is a) 60 V b) 120 V c) 240 V d) 220 V e) 480 V Answer C In a fin-coil heat exchanger the primary source of heat for the exchanger is a) steam or hot water b) gas c) oil d) solar e) radiant Answer A A type of directly fired space heater is a) a unit heater b) a floor furnace c) a wall furnace d) all of the above e) none of the above Answer D High efficiency furnaces and heaters range in annual fuel utilization efficiency (AFUE) from a) 94 - 98% b) 80 - 95% c) 70 - 75% d) 60 - 70% e) 50 - 60% Answer B In high efficiency furnaces if the temperature of the flue gas drops below 65 degrees C the a) flue gas will condense b) water vapour will condense c) furnace burner will shut down d) furnace burner will start up e) furnace vent will close Answer B In a pulse combination furnace the stated efficiency is a) 94 - 98% b) 80 - 95% c) 70 - 75% d) 60 - 70% e) 50 - 60% Warm Air Furnace Components and Maintenance Answer A Heat exchangers in gas fired furnaces are made of a) brass b) copper c) aluminum d) steel e) cast iron Answer D Air filters can be divided into two groups a) mechanical and rotating drum b) electronic and steam c) dry and wet d) steam and rotating drum e) mechanical and electronic Answer E