The electric motor is the smallest load used in most heating, cooling, and refrigeration systems.
Answer the following statement true (T) or false (F)
False
Rationale: The electric motor is the largest load used in most heating, cooling, and refrigeration systems.
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Which of the following is needed for a noncontact tachometer to read the speed of a blower or pulley?
a. A calculator for the relevant equation b. Near darkness c. A reflective spot or piece of tape d. An infrared receiver
Las formas para pisos y tipos similares de losas, se deben retirar _____.
a. después de 1o 2 días b. cuando así lo indique un ingeniero estructural c. cuando el concreto pueda soportar el peso de una persona promedio d. después de 7 a 14 días
El dispositivo usado para verter el concreto en formas verticales es _____.
a. la cinta transportadora b. la canaleta de caída c. el carro para concreto d. la pistola neumática
Which statement is true about fuse ratings?
A) The fuse rating should be less than the maximum current for the circuit B) The fuse rating should be higher than the normal current for the circuit C) 80% of the fuse rating should equal the current in the circuit D) Both B and C