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An HVACR service shop often has large storage cylinders of frequently used refrigerant available. These service cylinders often have valves on the bottom or are positioned upside-down so the valve appears on the bottom. What are the advantages and reasons for doing this?

After topping off an air-conditioning system that had a low refrigerant charge, you close the cylinder’s hand valve. Explain what safety procedure steps should be followed when moving this cylinder back to your service truck. Note that this refrigerant cylinder weighs over 35 lb.

Why is it useful to block off a suspected leak area from light and wind before using certain refrigerant leak detection methods?

Label the parts of the leaf cross-section . 

What is this piece of lab equipment called?  

Identify the prokaryotic shapes. 

What type of cell is this?  

You analyze an elbow plot of a k-cluster analysis based on part-worths from a conjoint. You come to the conclusion that there are 3 distinct clusters. You can only target one cluster. True/False: In that case, you should target the cluster that has the highest WTP (i.e. people in that cluster are willing to pay the most for your product).  

You are a manufacturer of a new appetite reducing drug that requires prescription. A direct competitor is increasing advertising investment in their drug, with an informative ad on how the drug works to reduce appetite. True/False: you can decrease your own advertising spending to achieve the same sales target.

A non-durable product (for example, brand A whole milk) has a price elasticity of  -0.8 at the aggregate. True/False: Increasing the price of the product by 1% will likely increase the revenues from existing customers.