Which of the following statements is/are correct

1. As compared to  vane less diffuser when used alone, the vaned diffuser is more compact and of small geometrical dimension for same pressure

2. The design efficiency of vaned diffuser is more than that of vane less

3. Efficiency of vaned diffuser is less than vane less diffuser at part load

Which of the following statements are/is true

1. Slip factor is considered as loss

2. Slip factor is ratio of work done on the gas with finite number of blades to the work done on the gas with infinite number of blades.

3. Slip factor is a function of impeller geometry and number of blades

Work required by reciprocating compressor with isothermal compression

Volumetric efficiency of the reciprocating compressor is given by

Which of the following statement is true about volumetric efficiency of reciprocating compressor?

1. With increase in pressure ratio volumetric efficiency decreases.

2. With increase in polytrophic index volumetric efficiency increases.

3. With increase in clearance volume volumetric efficiency decreases.

4. If no air is supplied the volumetric efficiency become infinite.

Find the minimum number of stages required when air enters at 1 bar and 27^oC and delivered at 300 bar. The maximum discharge temperature is limited to 127^oC.( Assume perfect intercooling between stages and take n=1.3)

In a reciprocating compressor the cylinder dimension are given as bore diameter = 300mm, stroke = 400mm & speed = 400 rpm, clearance ratio = 5 %.

The compressor process has polytrophic index of n = 1.3 the inlet temperature of air is 20^o C and have a pressure of 97 KPa which is compressed to 650 KPa pressure. Determine the power input required if mechanical efficiency of the compressor is 95 %.

Which of the following are matched correctly

Slip factor for centrifugal compressor is given by

What is the relation of angles at inlet and outlet of nozzle and blade?

$\alpha$= nozzle (or) guide vane angle

$\beta$= Blade angle

Suffix 1 & 2 represents inlet & outlet conditions

Which of the following is a boiler mounting?

A boiler produces 33.33 kg/min of steam with enthalpy content of 2426kJ/kg, from feed water at temperature 40⁰C, liquid enthalpy = 168kJ/kg, enthalpy of vaporization  of water = 2258kJ/kg Determine the equivalent evaporation of boiler in (kg/hr)

All mode of heat  transfer (conduction, convection &  Radiation) takes place , in which device

Which of the following boiler use Supersonic flue gas velocity?

Which of the following is used to clean flue gases?

Fusible plug is used in boiler to

The amount of oxygen required to burn 1kg of $C{H}_4$ completely will be (Taking atomic weight of element H = 1, C = 12, O = 16).

Arrange in descending order of the coal grade

The predominant mixture of propane & Butane is called 

Which of the following is not a coal liquefaction process?

Bomb calorimeter is used to determine the calorific value of which of the following fuels

Composition of products of combustion is determined using 

Bomb calorimeter determines the calorific value at

The amount of ${\text{CO}}_2$produced by 1kg of carbon monoxide on combustion is

Which of the following statement is TRUE about cyclone furnace?

(1)This ability to collect ash is the biggest advantage of the cyclone furnace burning process.

(2) The coal used must have relatively high sulfur content.

(3) Erosion of  burner due to high velocity of coal.