Capacity control

capacity-control

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Question 1 of 1

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142356

600

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For a given application a particular compressor is found to have a volumetric efficiency of 72%, when operating at its designed speed of 300 rpm. If the speed is increased to 500 rpm it is most likely that the volumetric efficiency will?

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(0/0)

142357

600

none

From the following compute the rpm of a single acting compressor. If it has a stroke of 8" and the piston speed (velocity) is 360' feet per minute?

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(0/0)

142358

600

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Calculate the compressor displacement of a (2) cylinder, 6x6 compressor operating at a speed of 400 rpm?

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142359

600

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What would be the actual amount of vapor moved by the compressor in the previous question (78.5) if it had a volumetric efficiency of 88%

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142360

600

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Calculate the maximum displacement of a (6) cylinder compressor operating at 650 rpm. Each ylinder has a volume of 50 cubic inches ?

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142361

600

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If a reciprocating compressors unloaders fail in the open position which of the following will take place?

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142362

600

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Clearence pockets are equipped with a small manual valve that makes it possible to open and close the pocket. What effect does it have on the system when it has been adjusted to the open position?

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(0/0)

142363

600

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Freon compressors are sometimes equipped with magnetic cylinder bypass valves. One of the functions of these valves is to ?

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(0/0)

142364

600

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In a freon compression system, which of the following would be associated with a reduction in capacity?

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(0/0)

142365

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Freon compressors are sometimes equipped with magnetic cylinder bypass valves. One of the functions of these valves is to ?

Select the correct answer(s).

(0/0)

142366

600

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A system is equipped with (4) compressors. Each compressor can operate at 25, 50, 75 and 100 % of rated capacity. How many steps of capacity control are available in this system?

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142367

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If a reciprocating compressor is not equipped with unloaders, which of the following will be needed to control system capacity?

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(0/0)

142368

600

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Which of the following is not used to vary the capacity of a reciprocating compressor?

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(0/0)

142369

600

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Under what conditions would all of the compressors in a parallel arrangement operate simultaneously?

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(0/0)

142370

600

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A refrigeration system has two 40 ton machines. Each machine has a capacity control in steps of 25, 50, 75, 100% of rated capacity. Assuming the system maintains a perfectly uniform suction pressure and temperature throughout the range of capacity control, the minimum capacity with only one machine operating at 50% of capacity would be?

Capacity control

Question 1 of 1

Time Left

For a given application a particular compressor is found to have a volumetric efficiency of 72%, when operating at its designed speed of 300 rpm. If the speed is increased to 500 rpm it is most likely that the volumetric efficiency will?

Select the correct answer(s).

(0/0)

From the following compute the rpm of a single acting compressor. If it has a stroke of 8" and the piston speed (velocity) is 360' feet per minute?

Select the correct answer(s).

(0/0)

Calculate the compressor displacement of a (2) cylinder, 6x6 compressor operating at a speed of 400 rpm?

Select the correct answer(s).

(0/0)

What would be the actual amount of vapor moved by the compressor in the previous question (78.5) if it had a volumetric efficiency of 88%

Select the correct answer(s).

(0/0)

Calculate the maximum displacement of a (6) cylinder compressor operating at 650 rpm. Each ylinder has a volume of 50 cubic inches ?

Select the correct answer(s).

(0/0)

If a reciprocating compressors unloaders fail in the open position which of the following will take place?

Select the correct answer(s).

(0/0)

Clearence pockets are equipped with a small manual valve that makes it possible to open and close the pocket. What effect does it have on the system when it has been adjusted to the open position?

Select the correct answer(s).

(0/0)

Freon compressors are sometimes equipped with magnetic cylinder bypass valves. One of the functions of these valves is to ?

Select the correct answer(s).

(0/0)

In a freon compression system, which of the following would be associated with a reduction in capacity?

Select the correct answer(s).

(0/0)

Freon compressors are sometimes equipped with magnetic cylinder bypass valves. One of the functions of these valves is to ?

Select the correct answer(s).

(0/0)

A system is equipped with (4) compressors. Each compressor can operate at 25, 50, 75 and 100 % of rated capacity. How many steps of capacity control are available in this system?

Select the correct answer(s).

(0/0)

If a reciprocating compressor is not equipped with unloaders, which of the following will be needed to control system capacity?

Select the correct answer(s).

(0/0)

Which of the following is not used to vary the capacity of a reciprocating compressor?

Select the correct answer(s).

(0/0)

Under what conditions would all of the compressors in a parallel arrangement operate simultaneously?

Select the correct answer(s).

(0/0)

Select the correct answer(s).

(0/0)

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