ISRO Scientist or Engineer Refrigeration & Air-Conditioning 2019

The rate of heat flow through a composite wall of three layers of thickness 0.3 m, 0.2 m, 0.15 m and of corresponding thermal conductivities 1.2, 0.8 and 0.6 kJ/hr-m$$^\circ C$$ is 1280 kd/hr. If the surface area normal to the direction of heat flow is 1 sq.mtr. and inner surface temperature is $$1000^\circ C$$, then the interface temperature at the end of first layer will be

For the four link mechanism with the dimensions of the links indicated in standard units of length, choose the type of mechanism from the given options

Operating pressure angle for involute gear teeth is

For the position of the mechanism shown in Figure, find the velocity of the slider B for the given configuration if the velocity of the slider A is 3 m/s. Consider AB as a rigid link and is parallel to CD at this instant.

The device used to heat feed water by utilizing the heat of the exhaust flue gases before leaving through the chimney is called

The power consumed by a reciprocating air compressor will be minimum, if the compression follows the following thermodynamic process

In an impulsereaction turbine stage, the heat drop in fixed and moving blades are 20 kJ/kg and 30 kJ/kg respectively. The degree of reaction for this stage will be

Which among the following automobile exhaust gas pollutants is a major cause of photochemical smog?

In a two stage reciprocating air compressor with a suction pressure of 4 bar and delivery pressure of 16 bar, the ideal intercooler pressure will be

In PERT chart, the activity time distribution is