Which of the following is not a revenue model?

A. Product sales
B. Transaction fee revenue
C. Advertising revenue
D. Freemium revenue


Answer: D

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All control systems can be subdivided into ____, no matter how many controls there are.

A. throttle loops B. control loops C. control segments D. sensor segments

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In poultry, feed particles move from the mouth into the esophagus, then into a temporary storage structure termed the:

A. proventriculus B. gizzard C. crop

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Which of the four types of refrigeration systems cools the air without removing any heat from the air?

A) Thermoelectric systems B) Evaporative systems C) Mechanical refrigeration systems D) Absorption refrigeration systems

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The safety valve reduces pressure at ____ psi.

a. 150 b. 50 c. 100

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