Compressor Control Methods Quiz

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Questions and Answers

What is the purpose of the start and stop control method for a compressor?

  • To maintain a constant pressure in the system (correct)
  • To control the compressor output based on load requirements
  • To reduce the wear and tear on the electric motor
  • To increase the efficiency of the compressor

Why is it important to install a sufficiently large receiver in a compressor system using start and stop control?

  • To decrease the wear on the unloader valve
  • To increase the speed of the compressor
  • To reduce the overall size of the compressor unit
  • To prevent the compressor from starting and stopping continuously (correct)

How does the unloader protect the motor from overloading during compressor startup?

  • By increasing the pressure in the receiver
  • By reducing the speed of the compressor
  • By unloading the compressor automatically (correct)
  • By shutting down the compressor completely

Why is a suitable unloader needed for a compressor using start and stop control?

<p>To load and unload the compressor automatically (B)</p> Signup and view all the answers

What is the function of the unloader valve in a compressor system?

<p>To release trapped compressed air (A)</p> Signup and view all the answers

Why is dual control not used in electric motor-driven compressors?

<p>It is unnecessary for these compressors (D)</p> Signup and view all the answers

What is the purpose of the unloader valve in a reciprocating compressor?

<p>To reduce pressure in the discharge pipe to atmospheric pressure (C)</p> Signup and view all the answers

How does the pilot type unloader differ from the load/unload control system?

<p>It allows for variable output based on air demand (D)</p> Signup and view all the answers

Which of the following statements is true about the inlet valve unloader?

<p>It is ineffective when unloaded (D)</p> Signup and view all the answers

What is the purpose of a variable speed control method in a compressor system?

<p>To match compressor speed with system demand (C)</p> Signup and view all the answers

How does dual capacity control differ from load/unload control?

<p>It involves shutting down when running without loading for a set time (B)</p> Signup and view all the answers

In what situation would a pilot valve in an inlet valve unloader lift off its seat?

<p>When the system demand for air decreases (D)</p> Signup and view all the answers

What happens to the electric motor in a load/unload control system during operation?

<p>The electric motor starts frequently (D)</p> Signup and view all the answers

Which component ensures that air receiver pressure is maintained in a reciprocating compressor system?

<p>The check valve in the line (D)</p> Signup and view all the answers

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