The Enlightenment Test Revised Questions and Answers / Sure A+

Nate Heat Pump Revised Questions and Answers / Sure A + A 24 -V transformer with a 40 -VA rating can operate safely with a current of _____. a. 6.0 mA. b. 960.0 mA. c. 0.6 A. d. 1.67 A. - ✔✔1.67 A A cooling anticipator in the control circuit is connected in ____ with the ____ switch of the thermostat. a. Parallel, cooling b. Parallel, heating c. Series, cooling d. Series, heating - ✔✔Parallel, cooling A cooling load calculation estimates the sensible heat gain of a structure. The maximum sensible capacity of a cooling -only system should be within ______% of the calculated value. a. ± 10% b. + 10% c. + 15% d. + 30 % - ✔✔+ 15% A good fuse will yield a reading of ___ on an ohm meter. a. 0 Ω b. Less than 1 Ω c. Infinity d. A value that rises quickly to 0 Ω before falling slowly toward infinity - ✔✔0 Ω A resistance reading of 0 Ω across a coil indicates that the coil is ____ a. Good. b. Grounded. c. Open. d. Shorted. - ✔✔Shorted A resistance reading of infinity between the "R" terminal and the "S" terminal of the compressor motor indicates a(n) ____ a. Grounded motor winding. b. Open motor winding. c. Shorted motor winding. d. Tripped internal overload. - ✔✔Open motor winding A small voltage reading across a closed set of contacts in an energized circuit indicates that the ____ a. Contacts are in good condition. b. Contacts are pitted. c. Motor capacitor is defective. d. Wrong voltage is supplied to the unit. - ✔✔Contacts are pitted A system should be operated for at least ____ before heat measurements are taken. a. 20 minutes b. 30 minutes c. 45 minutes d. 1 hour - ✔✔20 minutes According to Ohms Law, what will happen if the voltage to the heater element is increased by 10%? a. The Btu output will increase by 5%. b. The current draw will decrease by 10%. c. The current draw will increase by 10%. d. The heater will overheat. - ✔✔The current draw will increase by 10% All safety switches must be ____. a. Connected in parallel with the control switch b. Connected in series with the control switch c. Normally closed limit switches d. Open at the same time in order to protect the load - ✔✔Connected in series with the control switch An acceptable capacitance reading for a run capacitor is ____ the microfarad rating printed on the capacitor. a. Equal to or up to 10% more than b. Equal to or up to 20% more than c. Plus or minus 10% of d. Plus or minus 20% of - ✔✔Plus or minus 10% of An auto -ranging meter automatically finds the best measurement range to display the quantity of ____ being measured. a. Amperes or ohms b. Amperes or volts c. Ohms or volts d. Amperes, ohms or volts - ✔✔Amperes, ohms or volts Any individual load in a 24 -V control circuit should draw a measurable current of ____