84051. A compressor at high altitudes will require __________ power.
84052. The mean effective pressure of the compressor is the
84053. The reason for volumetric efficiency of reciprocating compressor being less than 100 percent is
84054. For minimum work in multi-stage compression, the workdone on all stages should be equal.
84055. The thrust of a jet propulsion power unit can be increased by
84056. Sum of exterior angles and interir angles of a regular hexagon is
84057. Slip factor in a centrifugal compressor indicates the amount of air leaked from the storage vessel.
84058. The ratio of the isentropic work to the Euler's work is known as pressure coefficient.
84059. A turbo-prop is preferred to turbo-jet because
84060. The air power of the compressor is also known as
84061. The overall isothermal efficiency of the compressor is defined as the ratio of
84062. The minimum work required for a three stage reciprocating air compressor is __________ the work required for each stage.
84063. For a multi-stage compressor, the polytropic efficiency is constant throughout for all the stages.
84064. In a high pressure compressor, the delivery pressure is
84065. When the outlet angle from the rotor of a centrifugal compressor is more than 90°, then the blades are said to be
84066. In axial flow compressors, the flow of air is parallel to the axis of compressor.
84067. The ratio of the isothermal power to the shaft power or brake power of the motor or engine required to drive the compressor is called overall isothermal efficiency.
84068. In a double acting compressor, the air is compressed
84069. The basic principle of the rocket propulsion is the same as that of jet propulsion.
84070. In a centrifugal compressor, the flow of air is __________ to the axis of compressor.
84071. For minimum work required to compress and deliver a quantity of air by multi-stage compression,
84072. Separators are generally used in air compressor installations
84073. If the flow of air through the compressor is perpendicular to its axis, then it is a
84074. In air compressors, free air delivery means the
84075. The gas in cooling chamber of a closed cycle gas turbine is cooled at
84076. A 3 m3/min compressor means that it
84077. The compression ratio for the compressor is always __________ unity.
84078. The assumption made in two stage compression with intercooler is that
84079. With the decrease in compression ratio, the volumetric efficiency
84080. The volume of air delivered in a medium capacity air compressor per unit time is
84081. In a closed cycle gas turbine, the air is compressed
84082. In a single stage, single acting reciprocating air compressor, without clearance volume, the workdone is minimum during
84083. A simple turbo-jet engine is basically a gas turbine engine equipped with a propulsive nozzle and diffuser.
84084. If the flow of air through the compressor is parallel to its axis, then the compressor is
84085. The volumetric efficiency of the compressor is defined as the ratio of volume of free air delivery per stroke to the swept volume of the piston.
84086. A centrifugal compressor is an axial flow compressor.
84087. A compressor must be driven by some prime mover.
84088. Volumetric efficiency of a compressor decreases with __________ in compression ratio.
84089. The overall thermal efficiency of an ideal gas turbine plant is (where r = Pressure ratio)
84090. The speed of rotary air compressor is __________ as compared to reciprocating air compressor.
84091. When air is to be compressed at a high pressure, then it is advantageous to use
84092. The absolute pressure of air at the outlet of a compressor is called
84093. The degree of reaction is usually kept __________ for all types of axial flow compressors.
84094. Standard air is the air at __________ and relative humidity of 36 percent.
84095. In a single stage, single acting reciprocating air compressor without clearance volume, the workdone is maximum during
84096. The compressor capacity is defined as the
84097. The operation of the reciprocating air motor is similar to reciprocating air compressor.
84098. The volume of air sucked by the compressor during its suction stroke is called
84099. For perfect intercooling in a two stage compressor,
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