84101. Reheating in a multi-stage expansion gas turbine __________ compressor work.
84102. The multi-stage compression ofair as compared to single stage compression
84103. Which one of the following is the effect of blade shape on performance of a centrifugal compressor ?
84104. In a jet engine, the air-fuel ratio is
84105. Which of the following bladings will give maximum pressure rise in a centrifugal compressor, assuming the same overall dimensions, blade inlet angle and rotational speeds ?
84106. In an axial flow compressor, the ratio of pressure in theTOtor blades to the pressure rise in the compressor in one stage is known as
84107. In a two stage reciprocating compressor with intercooler, the amount of work saved with incomplete intercooling is __________ that in case of complete intercooling.
84108. The free air delivery is the volume of air that can be delivered by a compressor freely.
84109. The ratio of the discharge pressure to the inlet pressure of air is called
84110. A regenerator in a gas turbine improves thermal efficiency.
84111. The velocity of air entering in a rocket is __________ as compared to an aircraft.
84112. A compressor mostly used for supercharging of I.C. engines is
84113. The workdone on a compressor will be minimum if air is taken from
84114. In a jet propulsion unit, the products of combustion after passing through the gas turbine are discharged into
84115. In a four stage compressor, if the pressure at the first and third stage are 1 bar and 16 bar, then the delivery pressure at the fourth stage will be
84116. The compressed air may be used
84117. A rocket works with maximum overall efficiency when air-craft velocity is __________ the jet velocity.
84118. The volumetric efficiency for reciprocating air compressors is about
84119. The maximum temperature in a gas turbine is
84120. x cr (x/1+x) cr x/1-x=?
84121. The ratio of ages of A and B ten years ago was 2:If the ratio of their present age is 3:4,then how old Is B now?
84122. If the remainder obtained by subtracting a number from its own square is 2 times the number,what is the number?
84123. If 100 is 20% of a number,then what the 120% of the number is?
84124. The next number in the following sequence is:10,20,32,46,62,----------
84125. Cast iron is a
84126. The hardness is the property of a material due to which it
84127. Malleable cast iron is produced
84128. Smelting is the process of
84129. The percentage of carbon in cast iron varies from
84130. The ability of a material to absorb energy in the plastic range is called
84131. If sin A=3/5,then tan A=
84132. A material is said to be allotropic, if it has
84133. Closed packed hexagonal space lattice is found in
84134. The hardness and tensile strength in austenitic stainless steel can be increased by
84135. The quenching of steel from the upper critical point results in a fine grained structure.
84136. An alloy steel which is work hardenable and which is used to make the blades of bulldozers, bucket wheel excavators and other earth moving equipment contain iron, carbon and
84137. Which of the following has a fine gold colour and is used for imitation jewellery?
84138. When the steel is normalised, its
84139. White cast iron has a high tensile strength and a low compressive strength.
84140. Dye penetrant method is generally used to locate
84141. The charge is fed into the blast furnace through the
84142. A small percentage of boron is added to steel in order to
84143. Which of the following process of steel making is in operation at Tata Iron and Steel Works, Jamshedpur?
84144. The unit cells
84145. Tungsten when added to steel __________ the critical temperature.
84146. Silicon when added to copper improves
84147. The alloying element which increases residual magnetism and coercive magnetic force in steel for magnets is
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