Question 39Refrigeration/AC - Assistant Engineer70% to pass
In addition to the drive belt itself, a V-belt that is tensioned too tight will cause excessive wear to what other drive component?
AI Explanation
The correct answer is B) motor shaft and compressor main bearings.
When a V-belt is tensioned too tightly, it can put excessive stress and wear on the motor shaft and the main bearings of the compressor. This is because the excessive tension in the belt transmits high loads through the shaft and into the bearings, causing them to wear out prematurely.
The other answer choices are incorrect because: A) the compressor drive pulley is not a component that would be excessively worn by a tight V-belt; C) the shaft of the prime mover (typically an electric motor) can also be damaged by the tight belt tension, but is not the main component that experiences the excessive wear; and D) the prime mover drive pulley, similar to the compressor pulley, is not the primary component affected by the tight belt tension.
Related Questions
#37 If the discharge reed valves used in a refrigeration compressor are leaking badly, what statement is true? #38 When one belt of a multiple V-belt drive requires replacing, what will be required? #40 On a modern refrigerated container unit employing suction modulation for the purposes of capacity control and capacity limitation, what happens when the applied voltage and current draw associated with the normally open (NO) suction modulation valve located in the suction line both increase? #41 To prevent motor overload during start-up of a hermetically sealed centrifugal refrigeration system, what is true concerning the compressor suction gas variable inlet guide vanes? #42 The fluid used as a source of actuating power against the underside of the unloader power element piston of the refrigeration compressor capacity control mechanism illustrated is obtained from where? Illustration GS-RA-13