____ are those in which a change may be made without requiring requalification of the procedure.

A. Essential variables
B. Nonessential variables
C. Code parameters
D. WPS parameters


Answer: B

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Technician A says that the same recovery unit can be used for R-12 and R-134a. Technician B says that the service hoses from an R-134a recovery unit must have shutoff valves within 18 inches of the end. Which technician is correct?

A) Technician A only B) Technician B only C) Both technicians D) Neither technician

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If the cooling system is low on coolant, what is a common symptom?

A) Hot air comes from the heater at all times due to an overheated engine B) The cooling system will not supply any coolant to the heater core so there will be complaint for a lack of heat C) Lack of heat from the heater, but only when the vehicle is at idle, yet plenty of heat when the engine is operating at highway speeds D) None of the above

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Of the various types of drain systems, open ditch systems are most practical and economical for use on ________

A) soils which do not freeze during the winter B) clay soils with poor drainage C) soils with a deep water table D) Vertisols E) poorly drained soils with sandy profiles

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Which of the following, along with appropriate R and C, makes for a simple astable multivibrator?

A) TTL inverter B) Schmitt inverter C) Single NAND gate D) Single flip-flop

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