What type of resistor could be used as variable voltage-divider?
A) potentiometer B) thermistor
C) rheostat D) any one of the above
A
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The retail value of a gallon of milk (fat free) is $4.19. Dairy farmers receive roughly $1.64 for this gallon of milk. What is the dairy farmer's share of the retail food dollar?
A) 42% B) 34% C) 39% D) 33%
The average soil mixture contains what percentage of air, water, minerals, and organic materials?
A) 45% air, 5% water, 25% mineral matter, and 25% organic material B) 50% air, 15% water, 10% mineral matter, and 25% organic material C) 5% air, 10% water, 50% mineral matter, and 35% organic material D) 25% air, 25% water, 45% mineral matter, and 5% organic material
What enabled Pizarro and his small and under-equipped force to conquer the vast Inca Empire?
a. famine and disease b. disease and civil war among the Inca c. civil war among the Spanish and the assistance of many Native American allies d. the discovery of silver mines in Inca territory and civil war among the Inca
Technician A says that if a relay is normally open, it must be energized in order to complete the controlled circuit. Technician B says that if a solenoid-operated valve is normally closed, it must be energized in order to allow flow through it.Who is correct?
A. Technician A only B. Technician B only C. Both technicians D. Neither technician