81. The performance of heat pump is expressed by
82. Percentage fat in butter is
83. Density of air at normal conditions is . . . . . . . . kg/m3.
84. A saturated soil sample has 42.2% water content and unit weight 2.69. The void ratio of the soil sample will be
85. In ice bank system of refrigeration usual value of COP is
86. According to PFA table butter should not contain less than . . . . . . . . percent fat and . . . . . . . . percent moisture.
87. Types of cultivators are
88. For tractor conditions the desired temperature drop in the water as it passes from the top of the radiator to the bottom should lie in the range of
89. Weight transfer in a tractor implement system is weight caused by
90. The distributor automatically advances the timing of the spark according to requirement with the . . . . . . . . advance mechanism.
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