A(n) ____ flip-flop is useful where only one data bit (1 or 0) is to be stored.
A. RS
B. Clocked RS
C. D
D. JK
Answer: C
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Which of the following statements about converting a system from one refrigerant to another is incorrect?
a. Synthetic and mineral oils are completely compatible. b. A new metering device may be required. c. Equipment capacity may change with the new refrigerant. d. Gaskets and O-rings may have to be changed.
In some conventional fire alarm systems using a positive alarm sequence, alarm delay is usually adjustable for a period of up to _____.
a. three minutes b. four minutes c. five minutes d. six minutes
The stretcher is laid in a vertical position with the shortest, widest side exposed at the front of the wall.
Answer the following statement true (T) or false (F)
A mechanical contractor's normal sequence in which drawings are produced in house for a construction project is _____.
a. coordination drawings, cut lists, shop drawings b. shop drawings, mechanical plans, cut lists c. cut lists, shop drawings, mechanical plan d. shop drawings, coordination drawings, cut lists