A vacuum pump is used by a technician to:
A. Remove air from the system after repairs have been performed
B. Remove moisture from the system after repairs have been performed
C. Remove refrigerant from the air conditioning system
D. Both A and B are correct
Answer: D
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What type of reactor can be used for both batch and continuous reaction processes?
A. Tubular reactor B. Fixed bed reactor C. Stirred tank reactor D. Fluidized bed reactor
The amount of radiant heat energy given off per unit of time from an object depends on the temperature of the radiating body and the _____.
a. barometric pressure b. temperature difference c. humidity of the surrounding air d. object’s color and surface type
The two energy compounds used in the carbon-fixation reactions are:
a. CO2 and H2O c. PGA and ATP b. ATP and NADPH d. C3 and RuBP
Recent research with annual crops such as wheat, sunflower and sorghum in the Great Plains region suggests that, compared to continuous cropping, soil quality, crop productivity and farm profitability are likely to be greater when crops are grown in a field only every second year with the soil kept free of weeds in the non-crop year by repeated cultivation of herbicide application
Indicate whether the statement is true or false