4678750
Descripción
Test por TRAVIS CANNING, actualizado hace más de 1 año
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Creado por TRAVIS CANNING
hace casi 9 años
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Pregunta 1
Pregunta
The absolute discharge pressure compared to the absolute intake pressure is referred to as
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guage pressure
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compression ratio
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isentropic exponent
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isothermal compression
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absolute pressure
Pregunta 2
Pregunta
Air at normal atmospheric conditions located at the compressor inlet is termed
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free air
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interstage air
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compression air
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ambient air
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unloaded air
Pregunta 3
Pregunta
The volumetric efficiency of an air compressor is the ratio of
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1st stage cylinder volume to 2nd stage cylinder volume
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inlet air temperature compared to discharge air temperature
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capacity to displaced volume
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isothermal compression compared to adiabatic compression
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cylinder volume compared to air receiver volume
Pregunta 4
Pregunta
An air compression curve on a pressure-volume diaphragm will be:
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pure polytropic
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purely isentropic
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purely isothermal
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somewhere between constant pressure and constant volume
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somewhere between adiabatic and isothermal
Pregunta 5
Pregunta
The clearance volume on an air compressor
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has no effect on discharge capacity
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has a direct effect on compressor capacity
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varies with the speed of the compressor
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must be large enough to prevent the cylinder overheating
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is important in the event that there is moisture in the air being compressed
Pregunta 6
Pregunta
An air compressor at a significantly higher altitude compared to an air compressor at a lower altitude will deliver:
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less volume of air
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higher volume of air
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less mass of air
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more mass of air
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an equal mass of air
Pregunta 7
Pregunta
The effect of moisture in a compressed air system is detrimental because:
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it will lower the discharge air temperature
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it will cause corrosion in the air piping
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it will freeze in the winter
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it will plug the actuators
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it requires more power to compress the air
Pregunta 8
Pregunta
The term dewpoint is defined as
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saturation pressure of the air
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the temperature of the air when it begins to absorb moisture
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relative humidity
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the temperature of the air when water vapour begins to condense
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none of the above
Pregunta 9
Pregunta
Air compressors may be classified as either:
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positive displacement and dynamic
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single acting and double acting
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single stage and multi stage
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positive displacement and negative displacement
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centrifugal and reciprocating
Pregunta 10
Pregunta
which type of air compressor is best suited for high pressure, moderate volume applications
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reciprocating
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centrifugal
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rotary
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dynamic
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axial
Pregunta 11
Pregunta
A reciprocating air compressor compared to a rotary air compressor is:
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more efficient
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less efficient
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equally efficient
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easier to operate
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requires less lubrication
Pregunta 12
Pregunta
which of the following is a positive displacement compressor:
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axial
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centrifugal
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turbine
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reciprocating
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none of the above
Pregunta 13
Pregunta
A reciprocating compressor has the ability to deliver oil-free air if:
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no oil is used to lubricate the cylinder
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the piston uses Teflon rings
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if the exhaust air is filtered prior to entering the air reciever
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not possible to deliver oil free air
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synthetic oil is used instead of conventional oil
Pregunta 14
Pregunta
A reciprocating air compressor is suitable for:
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pulsation free air
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low pressure applications
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all pressure ranges
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delivering moisture free air
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all of the above
Pregunta 15
Pregunta
The piston on an air compressor may be made of
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alloy steel
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cast iron
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steel
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aluminum
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all of the above
Pregunta 16
Pregunta
A double-acting reciprocating compressor:
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has more than one stage
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may compress more than one fluid at a time
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must utilize an intercooler
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receives and discharges air at both ends of the cylinder
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is of a dynamic axial design
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