Related Questions

The thermostatic expansion valve operates on the changes in the
A Degree of superheat at exit from the evaporator
B Temperature of the evaporator
C Pressure in the evaporator
D None of the above
A thermostatic expansion valve in a refrigeration system
A Ensures the evaporator completely filled with refrigerant of the load
B Is suitable only for constant load systems
C Maintains different temperatures in evaporator in proportion to load
D None of the above
Most thermostatic expansion valves are set for a superheat of
A 5°C
B 10°C
C 15°C
D 20°C
In Meyer's expansion valve, the expansion valve is driven by an eccentric having an angle of advance from
A 50° - 60°
B 60° - 70°
C 70° - 80°
D 80° - 90°
For the same terminal conditions and valve size, the pressure drop in a fully opened globe valve as compared to that in a gate valve is
A More
B Less
C Equal
D Either A or B; depends on the viscosity of the fluid
In Meyer's expansion valve, the main valve is driven by an eccentric having an angle of advance from
A 10° - 15°
B 15° - 25°
C 25° - 30°
D 30° - 40°
The valve used for very remote and accurate control of fluid is a __________ valve.
A Needle
B Globe
C Gate
D Butterfly
The mixing vat in a factory receives liquid ingredients through six separate value--- labeled R.S.T.U,Y and Z -- each of which has exactly two settings: open and closed.The mixing vat operator must ensure that each valve is set open or closed according to the following conditions: If T is open, both S and Z must be closed, R and Z cannot both be closed at the same time; If Y is closed, Z must also be closed;S and U cannot both be open at the same time. Which of the following, if given to the mixing vat operator as an instruction, would not determine the setting of any other valve ?
A S must be open
B T must be open
C U must be open
Main gas valve in a gaseous fuel burner is a __________ valve.
A Gate
B Butterfly
C Globe
D None of these
In a steam engine, the earlier cut-off with a simple slide valve may be obtained by increasing the steam lap and the angle of advance of the eccentric but keeping constant the travel and lead of the valve, this method will
A Cause withdrawing or throttling of steam
B Reduce length of effective stroke of piston
C Reduce maximum opening of port to steam
D All of these

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