¿Qué tipo de carga de velocidad ajustable tiene la característica de que la velocidad y el torque son inversamente proporcionales entre sí (a medida que la velocidad aumenta, el torque disminuye, y viceversa)?
a. De potencia constante
b. De torque variable
c. De torque constante
d. De potencia variable
a. De potencia constante
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Which of these is not an important consideration in refrigerant piping design?
A) Friction losses, which reduce compressor capacity. B) Height of compressor with respect to cooling coils. C) Velocity to move oil in the suction line. D) Thermal expansion of the hot gas line.
The set of a piping offset that has a travel of 10 inches and an angle of 30 degrees is _____ inch(es). (Refer to the figure above.)
a. 1.00 b. 2.59 c. 5 d. 7
The process of coating with zinc is called ____________________
Fill in the blank(s) with the appropriate word(s).
The absorption of hydrogen into the weld pool is the primary cause of _____
a. undercut b. excessive reinforcement c. porosity d. solidification cracks