ISRO Scientist or Engineer Refrigeration & Air-Conditioning 2018

Instructions

For the following questions answer them individually

Question 61

The formation of frost on cooling coils in a refrigerator

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Question 62

The effect of Sub cooling in a refrigeration cycle will result in

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Question 63

In order to cool and dehumidify a stream of moist air, it must be passed over the coil at a temperature

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Question 64

In a chemical dehumidification process, the dry bulb temperature of air

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Question 65

The atmospheric air at dry bulb temperature of $$15^\circ$$C enters a heating coil maintained at $$40^\circ$$C. The air leaves the heating coil at $$25^\circ$$C. The by-pass factor of the heating coil is

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Question 66

A grinding wheel of 150 mm diameter is rotating at 3000 rpm. The grinding speed is :

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Question 67

The angle made by the face of the tool and the plane parallel to the base of cutting tool is called

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Question 68

When the metal is removed by erosion caused by rapidly recurring spark discharges between the tool and work, the process is known as

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Question 69

In order to double the period of a simple pendulum, the length of the string should be :

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Question 70

In a multiple V-belt drive system, when a single belt is damaged, it is preferable to change the complete set in order to

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