What controls the operation of a pulse-wiper system?
A) Transistor
B) Resistor that controls current flow to the wiper motor
C) Solid-state (electronic) module
D) Variable speed gem set
C
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What advantage does a successive-approximation ADC have over the counter ADC?
A) It uses less costly components. B) It uses fewer components. C) It has faster conversion times. D) All of the above are correct.
Why is a check valve installed in the suction line of the lowest-temperature coil in a multiple-evaporator system?
A) To allow the service technician to check the operation of the system B) To ensure that the refrigerant is completely vaporized before leaving the evaporator C) To prevent refrigerant migration from the higher-temperature-and-pressure coil to the lower-temperature and-pressure coil D) To allow the coil to be isolated from other evaporator coils when checking the operating of the evaporator pressure regulator
___________________ are used in water circuits to remove particles that may be in suspension and circulating.
Fill in the blank(s) with the appropriate word(s).
As a leader of the African-American community, Booker T. Washington
A. helped to found the National Association for the Advancement of Colored People. B. believed developing the economic and educational resources of the black community was secondary to achieving political equality. C. discovered hundreds of uses for the peanut. D. promoted black self-help but did not challenge segregation directly. E. shared a similar political philosophy with W.E.B. Du Bois.