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You Are On Multi Choice Question Bank SET 1414

70701. Fill in the blanks using the suitable words in the choices. She looks ill, .........?





70702. The gas in cooling chamber of a closed cycle gas turbine is cooled at





70703. A 3 m3/min compressor means that it





70704. The compression ratio for the compressor is always __________ unity.




70705. The assumption made in two stage compression with intercooler is that





70706. With the decrease in compression ratio, the volumetric efficiency




70707. The volume of air delivered in a medium capacity air compressor per unit time is





70708. In a closed cycle gas turbine, the air is compressed





70709. In a single stage, single acting reciprocating air compressor, without clearance volume, the workdone is minimum during





70710. A simple turbo-jet engine is basically a gas turbine engine equipped with a propulsive nozzle and diffuser.



70711. If the flow of air through the compressor is parallel to its axis, then the compressor is





70712. 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.



70713. A centrifugal compressor is an axial flow compressor.



70714. A compressor must be driven by some prime mover.



70715. The gas used in fire extinguishers is:?





70716. Volumetric efficiency of a compressor decreases with __________ in compression ratio.



70717. The overall thermal efficiency of an ideal gas turbine plant is (where r = Pressure ratio)



70718. The speed of rotary air compressor is __________ as compared to reciprocating air compressor.



70719. When air is to be compressed at a high pressure, then it is advantageous to use





70720. The absolute pressure of air at the outlet of a compressor is called





70721. The degree of reaction is usually kept __________ for all types of axial flow compressors.





70722. Standard air is the air at __________ and relative humidity of 36 percent.





70723. In a single stage, single acting reciprocating air compressor without clearance volume, the workdone is maximum during





70724. The compressor capacity is defined as the





70725. The Stone Age people had the first domestic?





70726. The operation of the reciprocating air motor is similar to reciprocating air compressor.



70727. The volume of air sucked by the compressor during its suction stroke is called





70728. For perfect intercooling in a two stage compressor,



70729. ‘Arrears’ best means :?





70730. The volumetric efficiency of a compressor





70731. Reheating in a multi-stage expansion gas turbine __________ compressor work.




70732. The multi-stage compression ofair as compared to single stage compression





70733. Which one of the following is the effect of blade shape on performance of a centrifugal compressor ?





70734. In a jet engine, the air-fuel ratio is





70735. 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 ?





70736. 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





70737. In a two stage reciprocating compressor with intercooler, the amount of work saved with incomplete intercooling is __________ that in case of complete intercooling.



70738. The free air delivery is the volume of air that can be delivered by a compressor freely.



70739. The ratio of the discharge pressure to the inlet pressure of air is called





70740. A regenerator in a gas turbine improves thermal efficiency.



70741. The velocity of air entering in a rocket is __________ as compared to an aircraft.





70742. A compressor mostly used for supercharging of I.C. engines is





70743. The workdone on a compressor will be minimum if air is taken from





70744. In a jet propulsion unit, the products of combustion after passing through the gas turbine are discharged into





70745. 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





70746. The compressed air may be used





70747. A rocket works with maximum overall efficiency when air-craft velocity is __________ the jet velocity.




70748. The volumetric efficiency for reciprocating air compressors is about





70749. The maximum temperature in a gas turbine is





70750. x cr (x/1+x) cr x/1-x=?





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