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ENGINEERING > flumach > Flashcards

flumach Flashcards

1
Q

Heat exchangers for cooling air or gas discharged from compressors. They
provide the most effective means of removing moisture from compressed air and gases.

A

Aftercooler

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2
Q

Are machines cooled by atmospheric air circulated around the
cylinders or casings.

A

Air-Cooled Compressors

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3
Q

A device that removes moisture from compressed air. Typically accomplished by
cooling the air through a refrigerator or desiccant bed.

A

Air Dryer

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4
Q

automatic control instrumentation designed to prevent compressors from
operating at or near pressure and flow conditions that result in surge.

A

Anti-surge

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5
Q

A metallic structure on which a compressor or other machine is mounted.

A

Base Plate

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6
Q

The actual power input required by a compressor.

A

Brake Power

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7
Q

a hand-held or foot-controlled flexible bag that produces a concentrated blast of air
ideal for achieving higher temperature in furnaces.

A

Bellows

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8
Q

The pressure containing stationary element that encloses the rotor and associated
internal components of a compressor. Includes integral inlet and discharge corrections
(nozzles).

A

Casing

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9
Q

A valve that permits flow in one direction only.

A

Check valve

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10
Q

The maximum cylinder volume on a working side of the piston minus the piston
displacement volume per stroke. It is usually expressed as a percentage of the displaced
volume.

A

Clearance

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11
Q

A specific type of filter that not only works to remove dust and particulates
from the air, but also oil from the air lines.

A

Coalescing filter

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12
Q

The full rated volume flow of gas compressed and delivered by the
compressor at conditions prevailing at the compressor inlet. It sometimes means actual flow
rate expressed in ft3/min or m3/min.

A

Compressor Capacity

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13
Q

The part of a reciprocating compressor that connects the piston to the
crankshaft.

A

Connecting Rod

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14
Q

The part of a reciprocating compressor that encloses the piston.

A

Cylinder

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15
Q

A device that promotes separation of liquids from gases.

A

Demister

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16
Q

A material having a large proportion of surface pores, capable of attracting and
removing water vapor from the air.

A

Desiccant

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17
Q

Dries the air in the compressor tank, reducing the amount of moisture collected

A

Dryer

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18
Q

A stationary passage surrounding an impeller, in which velocity pressure imparted
to the flowing medium by the impeller is converted into static pressure.

A

Diffuser

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19
Q

Air pressure produced at the discharge flange of the compressor.

A

Discharge Pressure

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20
Q

The temperature at the discharge flange of the compressor.

A

Discharge Temperature

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21
Q

A ______ works to remove excess liquid from the compressor. These include
manual, float and electronic types of drain valves.

A

Drain Valve

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22
Q

an easy-to-replace, low-leakage type of seal consisting of a series of carbon
rings that can be arranged with a buffer gas to prevent the process gas from escaping.

A

Dry carbon ring

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23
Q

Any reference to efficiency of a dynamic type compressor must be accompanied
by a qualifying statement which identifies the efficiency under consideration, as in the
following definitions.

A

Efficiency

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24
Q

are devices for separating and removing dust and dirt from air before it enters a
compress.
Cmp – 1

A

Filters

25
Q

The ______ (inlet or discharge) is a means of connecting the
casing to the inlet or discharge piping by means of bolted rims (flanges).

A

Flange Connection

26
Q

Air at atmospheric conditions at any specific location. Because the altitude,
barometer, and temperature may vary at different localities and at different times, it follows
that this term does not mean air under identical or standard conditions.

A

Free Air

27
Q

The pressure determined by most instruments and gauges, usually
expressed in bars.

A

Gauge Pressure

28
Q

The part of a dynamic compressor that impacts energy to the flowing medium by
means of centrifugal force. It consists of a number of blades mounted so as to rotate with
the shaft.

A

Impeller

29
Q

A pressure volume diagram for a compressor or engine cylinder produced by
direct measurement made by the use of a device called an indicator.

A

Indicator Card

30
Q

Heat exchangers for removing the heat of compression between stages of a
compressor. They usually condense and remove a considerable amount of moisture as well.

A

Intercoolers

31
Q

The removal of heat from the air or gas between stages or stage groups.

A
  1. Intercooling -
32
Q

a shaft seal designed to restrict flow by requiring the fluid to pass through a
series of ridges and intricate paths.

A

Labyrinth Seal

33
Q

a close fitting bushing in which oil and water are injected in order to
seal the process from the atmosphere.

A

Liquid Buffered Seal

34
Q

a system that circulates and cools sealing and lubricating oils.

A

Lubrication System

34
Q

a rotary compressor that uses an impeller with vanes to transmit
centrifugal force into a sealing fluid, such as water, driving it against the wall of a cylindrical
casing.

A

Liquid Ring Compressor

35
Q

The total pressure measured from absolute zero, (i.e., from an absolute
vacuum).

A

Absolute Pressure

36
Q

The limiting value of saturation pressure as the saturation temperature
approaches the critical temperature.

A

Critical Pressure

37
Q

Loss of pressure in a compressed air system or component due to friction or
restriction.

A

Pressure Drop

38
Q

The total absolute pressure at the inlet flange of a compressor.

A

Intake Pressure

39
Q

the pressure point setting where the pressure switch stops the compressor
from increasing the pressure in the tank above this point, also referred to as cut- out pressure.

A

Kick-out Pressure

40
Q

the pressure point setting where the pressure switch starts the compressor
once the pressure in the tank goes below this point, also referred to as cut-in pressure.

A

Kick-in Pressure

41
Q

The gas tight disc inside the cylinder of a reciprocating compressor responsible for
gas compression.

A

Piston

42
Q

the difference between cut-in and cut-out pressure.

A

Pressure Band or Pressure Differential

43
Q

The difference between the discharge pressure and the intake pressure.

A

Pressure Rise

44
Q

The pressure measured in a flowing stream (liquid or gas) in such a manner
that no effect on the measurement is produced by the velocity of the stream.

A

Static Pressure

45
Q

a device that turns on or shuts off the electric motor running the
compressor. It is designed to react on the cut –out and cut-in pressure settings of the system.

A

Pressure Switch

46
Q

The elimination of undesired gas or liquid from a system.

A

Purging

47
Q

devices designed to prevent the process gas from leaking from the compressor
shaft.

A

Seal System

48
Q

a device used to physically separate two or more components from a mixture.

A

Separator

49
Q

device designed to compress the gas a single time before
discharging the gas.

A

Single-stage Compressor

50
Q

is the measure of the fluid slip in the impeller of a centrifugal compressor.

A

Slip Factor

51
Q

the fixed blades that are mounted equally along the casing of an axial flow
compressor.

A

Stator Blades

52
Q

the intermittent flow of pressure through a compressor that occurs when the
discharge pressure is too high, resulting in flow reversal within a compressor.

A

Surging

53
Q

The power required to compress a gas adiabatically without any provision
for lost energy.

A

Theoretical Power

54
Q

A compressor that operates with an intake pressure below atmospheric
pressure.

A

Vacuum Pump

55
Q

Devices with passages for directing flow into alternate paths or to prevent flow.

A

Valves

56
Q

The ratio of the actual quantity of air delivered to the actual capacity
of the compressor.

A

Volumetric Efficiency

57
Q

The curved funnel that increases in area as it approaches the
discharge port of the compressor. The divergent shape of the volute converts the velocity of
the gas into static pressure.

A

Volute or Scroll Casing

58
Q

These are machines cooled by water circulated through jackets
surrounding the cylinders or casings.

A

Water-Cooled Compressors

ENGINEERING (5 decks)

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