Generally, an evaluation is _____.
a. used to measure staff awareness regarding policies
b. formative and specific to targeted craft workers
c. a judgment based on measuring performance or conditions
d. focused on measuring company construction processes
c. a judgment based on measuring performance or conditions
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Answer the following statements true (T) or false (F)
1 Burner flame impingement or poor flame distribution can cause overheating and failure of the tubes. 2 Poor control of excess air and poor draft control can lead to lost production time. 3 If atomization is not uniform, the burner tips on the atomization gun or burner require replacement. 4 When putting a vessel into service, the pressure should be increased quickly to operating pressure. 5 Accurate vessel wall thickness measurements may be made while the vessel is empty and clean.
A tenth of an hour is the same as ________ minutes
A) 3 B) 6 C) 12 D) 10
Industry and Federal guidelines require that the vacuum level in an evacuated air conditioning system be measured in __________.
A. inches of mercury B. cfm C. microns D. psig
Consider a full-wave, single-phase controlled rectifier, similar to that shown in Figure 12.2, that is used to drive a DC motor instead of the resistive load Ro. Assume that the motor is rated at 4 kW and 110Vrms and that the AC supply is 80Vrms 60 Hz. Also assume that the motor inductance is very large such that the motor current is ripple-free and that the motor constant is 0.055 V/rpm. If the motor runs at 1,000 rpm at rated current:
Find:
a) Determine the firing angle of the converter.
b) Determine the rms value of the supply current.
