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Test

4.9 Compressor Auxillaries and Operation

TRAVIS CANNING 10 preguntas

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Preguntas del test (10)

  1. 1_______ on centrifugal air compressors are provided in order to control the amount of air flowing to the impeller and thus control the capacity of the unit.
    1. AAdjustable inlet vanes
    2. BAdjustable diffuser vanes
    3. CVariable frequency drive
    4. DMoving and fixed blades
    5. EDummy piston
  2. 2The aftercooler is used in an air compression system to cool the:
    1. AAir after the first stage of compression
    2. BLubricating oil of large axial compressors
    3. CAir after it leaves the receiver
    4. DAir after the last stage of compression
    5. EAir before being compressed
  3. 3The aftercooler is used in an air compression system to cool the:
    1. AAir after the first stage of compression
    2. BLubricating oil of large axial compressors
    3. CAir after it leaves the receiver
    4. DAir after the last stage of compression
    5. EAir before being compressed
  4. 4Positive displacement compressor types include:
    1. Sliding vane
    2. Axial flow
    3. Internal gear
    4. Volute casing
    5. Rotary screw
    6. Multi lobe
    1. A1,3,4,6
    2. B2,4,5,6
    3. C1,3,5,6
    4. D1,2,4,5
    5. E2,3,5,6
  5. 5Effective intercooling will reduce weakening of parts due to high temperatures, and reduce possibility of:
    1. ACompressor explosions
    2. BWater hammer
    3. CCompressor implosions
    4. DCompressor leaks
    5. ECorrosion
  6. 6In the variable speed control method the compressor output is regulated by:
    1. AAdjustment of clearance pockets
    2. BValve unloaders
    3. CA safety relief valve
    4. DA driver that can be throttled
  7. 7A method of unloading a reciprocating compressor is to:
    1. AHold the discharge valve closed
    2. BHold the discharge valve open
    3. CPlace a check valve in the discharge line
    4. DHold the inlet valves in the open position
    5. EUnloading a cylinder
  8. 8The flow of air from a compressor must be _______ to suit the load requirements and to maintain constant pressure in the system.
    1. AIncreased
    2. BDecreased
    3. CDampened
    4. DInterrupted
    5. ERegulated
  9. 9To prevent surging, the load on the compressor must not be allowed to fall below the:
    1. ASurge limit
    2. BMaximum volume
    3. CRelated point
    4. DRated pressure
    5. ESet point
  10. 10The ________ control method can be used when a compressor is driven by a steam engine, a turbine, or an internal combustion engine.
    1. AConstant speed
    2. BStart and stop
    3. CDual
    4. DStart and stop in conjunction with constant speed
    5. EVariable speed

Información

Descripción
power engineering 3b2 Test sobre 4.9 Compressor Auxillaries and Operation, creado por TRAVIS CANNING el 01/03/2016.
Idioma
English
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