Page:9
Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'Deputy Engineer (Mechanical), Inspector of Factories and Boilers Gr II, Assistant Engineer (Mechanical)' And exam conducted in the year 2023. And Question paper code was '050/2023'. Medium of question paper was in Malayalam or English . Booklet Alphacode was 'A'. Answer keys are given at the bottom, but we suggest you to try answering the questions yourself and compare the key along wih to check your performance. Because we would like you to do and practice by yourself.
49.
50.
51.
52.
53.
54.
55.
56.
050/23
The ratio of hydrodynamic to thermal boundary layer thickness varies as
A) root of Prandtl number B) one-third of Prandtl number
C) two-third power of Stanton number D) four-fifth power of Nusselt number
In a counter flow heat exchanger, cold fluid enters at 30°C and leaves at 50°C,
whereas the hot fluid enters at 150°C and leaves at 130°C. The mean temperature
difference for this case is
A) 20°C B) 80°C
0) 100°C D) indeterminate
For a completely submerged body with center of gravity ‘G’ and center of buoyancy
‘B’, the condition of stability will be pressure
A) Gis located above B B) G is located below B
C) Gand Bare coincident D) None of the above
Consider the turbulent flow of a fluid through a circular pipe of diameter, D. Identify
the correct pair of statements.
1. Fluid is well mixed
2. Fluid is un mixed
3. Reynolds number less than 2300
4. Reynolds number greater than 2300.
A) 1,4 B) 1,3 C) 2,3 D) 2,4
A flow field which has only convective acceleration is
A) Asteady uniform flow B) An unsteady uniform flow
C) A steady non uniform flow D) All of the above
As per common design practices, the three types of hydraulic turbines in descending
order of flow rates are
A) Pelton, Francis, Kaplan B) Francis, Kaplan, Pelton
C) Pelton, Kaplan, Francis D) Kaplan, Francis, Pelton
A draft tube is not required for a
A) Francis turbine B) Kaplan turbine
C) Pelton wheel turbine D) None of the above
A pitot-static tube measures
Dynamic pressure
Difference in static and dynamic pressure
Static pressure
Atmospheric pressure
८.५.
0