To select a buck-and-boost transformer, use _____.
a. tables listed in the NEC®
b. standard electrical calculations
c. system measurements
d. charts provided by the manufacturer
d. charts provided by the manufacturer
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1.5 kg of air is initially at 25°C. The enthalpy of the air is increased by 850 kJ. Considering the variability of the specific heats, determine the final temperature of the air.
Given: m = 1.5 kg; T1 = 25°C; ?H = 850 kJ What will be an ideal response?
One of the advantages of electric heat is that _____.
a. it is less expensive than other types of fuels b. only one thermostat is needed for the whole system c. system maintenance is only required once a year d. initial installation costs are less than other types of heating systems
What two manual resets do all oil burners have?
A) The integrated furnace circuit breaker and the high fuel pressure reset B) The primary control reset and the secondary control reset C) The high limit manual reset and the smoke sensor manual reset D) The primary control reset and the oil burner motor overload manual reset
An engineering department employs 296 drafters in departments X and Z. Each engineer is assigned four drafters. Department X has 44 engineers. How many engineers are in department Z?
What will be an ideal response?