Which of the following describes the consequence of noncondensable gases collecting in the condenser and the resulting increases in refrigerant temperature and pressure?
A) The corrosion of metals throughout the system
B) A freeze-up at the expansion valve or metering device
C) A reduction of system capacity and an increase in energy usage
D) An increase in the efficiency of the refrigeration system
C
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Determine Leq at terminals a-b of the circuit in Fig. 6.73.
 FIGURE 1.png)
The sliding gear shifter levers on the quick change gear box are used for:
A) Selecting feeds or threads per inch B) Quickly change speeds C) Changing the ratio between the longitudinal feed and the cross feed D) Quickly changing feeds during a cut to get a varied finish
A synchronous MOD-64 counter has tpd = 14 ns for each flip-flop and tpd = 12 ns for each AND gate. What is the maximum safe frequency for this counter?
A) 71.43 MHz B) 38.45 MHz C) 500 MHz D) 83.33 MHz
If a system that operates at 1000 baud has four signal levels then the system can transfer ___________________ bits per second
a. 1000 b. 2000 c. 3000 d. 4000