The three basic types of condensers used with HVACR systems are:
A) Condensing, noncondensing, and static. B) Standard, metric, and transitional.
C) Air cooled, water cooled, and evaporative. D) External, internal, and cross-charged.
C
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A header truss is a single-pitched truss used to form a shed roof, or used in conjunction with hip trusses to form the external portion of the hip roof.
Answer the following statement true (T) or false (F)
El método de instalación mediante deslizamiento se refiere:
a. al deslizamiento de aislamiento de espuma flexible sobre una tubería recubierta con adhesivo. b. al aislamiento de válvulas con bridas. c. al aislamiento de conductos cerrados. d. a empujar la espuma flexible sobre tuberías con extremos abiertos.
Answer the following statement(s) true (T) or false (F)
A. The “gamma” refers to the activity coefficient in the liquid phase, while the “phi” refers to the mixture fugacity coefficient in the vapor phase. B. The approach is most beneficial for systems that behave as ideal solutions, such as benzene + toluene. C. The approach has value for systems when the system pressure is high. D. The approach is more complicated than Raoult’s Law or Modified Raoult’s Law, since the vapor-phase composition is a variable in the calculation of the mixture fugacity coefficients. E. None of the above are false.
For the AFD operating frequency range shown in Figure 4, the range of AFD output frequencies over which the ratio of volts to hertz remains constant is identified in the figure as _____.
a. A to C
b. D
c. A to D
d. A to B