Which of the following allotropic forms of phosphorus is used in the manufacture of safety matches?
A.White phosphorus
B.Red phosphorus
C.Black phosphorus
D.all forms of phosphorus
Category: Engineeeing Mcqs
Heat exchanger used in a steam condenser of a thermal power plant is
A.Direct contact type
B.Recuperator type
C.Regenerator type
D.Any one of the above
All of the following are non-destructive method of testing the castings EXCEPT:
A.Pressure test
B.Ultrasonic test
C.Tensile test
D.Dye penetrant inspection
If M 20 coarse pitch is 2.5 mm the mm the fine pitch for the size would be
A.10 mm
B.5 mm
C.2.5 mm
D.1.5 mm
E.None of the above
Which of the following material has high scrap value as compared to initial cost?
A.Aluminium
B.Steel
C.Copper
D.Wood
E.Cast iron
Cavitation is caused by
A.High velocity
B.Low barometric pressure
C.High pressure
D.Low pressure
E.Low velocity
Which of the following contributes to the improvement of efficiency of Rankine cycle in a thermal power plant?
A.Use of high pressures
B.Reheating of steam at some intermediate stage
C.Regeneration
D.All of the above
E.None of the above
The dynamic viscosity of most of the gases with rise in gas temperature
A.Increases
B.Increases as ?T
C.Increses inversely as ?T
D.Decreases
E.Does not change significantly
A sprue is
A.A tool used in mould repairing
B.A process of cleaning castings
C.A chemical added to molten materials to get sound castings
D.A vertical passage through the cope and connecting the pouring basin to the runner or gate
E.A special type of non-ferrous core used in centrifugal castings only
A gas used in gas engine trial was tested in a Boys Calorimeter. The pressure of gas supply was 7 cm of water column. If the barometric pressure is 760 mm of mercury, the absolute pressure of the gas would be
A.0.007 kg/sq-cm
B.0.14 kg/sq-cm
C.1.04 kg/sq-cm
D.1.14 kg/sq-cm
E.None of the above
