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Q1— Section header —
1.1.10(10 (10
1.2Sub cooled liquid Critical point Liquid and vapour mixture Absolute pressure kPa
Q2— Section header —
2.1.1Valve (Globe valve\ A valve is a mechanical device that blocks a pipe, either partially or completely, to change the amount of fluid that passes through it
2.1.2Strainer A strainer is a mechanical dev ice designed to help protect the system from the harmful or undesirable effects of both solid and fluid impurities. A strainer filters out solid debris in the water system
2.1.3Union
2.2.1Reciprocating compressor (1\
2.2.2Cylinder Piston Connecting rod Crankshaft Discharge valve
2.3They reduce the cost of handling, transportation and installation. Smaller number of joints facilitates the speed and reduces chances of leakage. They are rust -resistant. These pipes have good elastic properties.
Q3— Section header —
3.1.1Sub cooling in refrigeration means cooling the refrigerant in liquid state, at uniform pressure, to a temperature that is less than the saturation temperature, which corresponds to condenser pressure.
3.1.2Superheati ng is when liquid refrigerant enters an evaporator and is entirely vapori ed before it arrives at the outlet of the evaporator. The liquid is vapori ed at low temperature, while the vapour is
3.1.3The volumetric efficiency (V\ of a compressor is defined as the ratio of th e actual volume of gas sucked by it to the theoretical volume that it could have sucked if the clearance volume was not present.
3.1.4
3.2The current type relay has normally open (NO\ contacts. The coil of the relay is connected in series with the running windings of the compressor motor. When the power is switched on, the running winding will draw
3.3RNSD 20607,0\03,0(142,3 xx sm /005,0 005,0 0043,0 %86= (5\
4.1Regulation of air quantity Recirculation of air Flooding condenser with refrigerant Higher COP in flooded systems Better flow distribution into evaporator because the inlet is 100% liquid Better utili
4.4without irregular temperature differences between the refrigerant and the sub stance to be cooled. The evaporator must provide sufficient space for the liquid refrigerant as well as sufficient space for the refrigerant vapour to part from the liquid.
Q5— Section header —
5.1.1False
5.1.2True
5.1.3True
5.1.4True
5.1.5
5.2.1lash is refrigerant in gas form produced spontaneously when the condensed liquid is subjected to boi ling or when its boiling
5.2.2Sub cooling and superheating (2\
5.2.3It reduces refrigeration efficiency or the cooling effect (1\
5.3.1Anti vibration spring mounting (1\
5.3.2Elimination of vibration (1\
5.3.3Misaligned shafts Worn bearings, gears and drive belts etc
5.4Drain receiver tank Do an overall visual inspection and make sure all guards are secured Check lubricant leaks Check for unusual noise and vibrations Check for air leaks (4\ [20] TOTAL:20