Answer the following statement(s) true (T) or false (F)
1. Within the hydronics industry, the terms pump and circulator are used interchangeably.
2. The fluid’s mechanical energy content is increased as it is accelerated toward the inner edge of the impeller.
3. The motor of a wet rotor circulator is totally cooled and lubricated by the system’s fluid.
4. Most circulators used in smaller hydronic systems are designed to be installed with their shafts in a vertical position.
5. Always install the circulator so that its inlet is close to the connection point of the system’s expansion tank.
1. True
2. False
3. True
4. False
5. True
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A good analogy of the ____ control is a stack of pennies. This tolerance would control how round each penny is but not the straightness of the whole stack.
A. cylindricity B. concentric C. circularity D. flatness
All of the following statements are true EXCEPT:
A. cylinders are deglazed for use with new rings only if they have excessive bore taper. B. damaged cylinders or cylinders with too much taper should be rebored and honed by a machine shop to fit new oversized pistons. C. the top of an oversize piston is stamped with the amount of oversize. D. pistons of 0.030" oversize are most commonly used.
The United States produces over ____________________ of the world's supply of soybeans
Fill in the blank(s) with correct word
Commercial and industrial refrigeration systems:
A) Are only used in production facilities. B) Refer to retail food and cold-storage equipment and facilities. C) Are used only in supermarkets. D) Use three-phase equipment only.