Test Quiz Mechanical Engineering - Set 23


1. The coefficient of venturi-flume, generally, lies between
0.3 to 0.45
0.50 to 0.75
0.75 to 0.95
0.95 to 1.0

2. Teflon is used for bearings because of
Low coefficient of friction
Better heat dissipation
Smaller space consideration
All of these

3. The process of under-cooling is generally brought about by
Circulating more quantity of cooling water through the condenser
Using water colder than the main circulating water
Employing a heat exchanger
Any one of the above

4. The thermal diffusivity for gases is generally __________ those for liquids.
Equal to
Less than
Greater than
None of these

5. The enlarging of an existing circular hole with a rotating single point tool is called
Boring
Drilling
Reaming
Internal turning

6. During hot working of metals
Poor surface finish is produced
Scale is formed on the metal surface
Close tolerances cannot be maintained
All of these

7. A column that fails due to direct stress, is called
Short column
Long column
Weak column
Medium column

8. The specific gravity of water is taken as
0.001
0.01
0.1
1

9. An error of 1% in measuring head over the crest of the notch (H) will produce an error of __________ in discharge over a triangular notch,
1 %
1.5 %
2 %
2.5 %

10. In a cold chamber die casting machine, only nonferrous alloys with _________ are casted.
Low melting temperature
High melting temperature
Both (A) and (B)
None of these

11. A flow in which the quantity of liquid flowing per second is not constant, is called
Streamline flow
Turbulent flow
Steady flow
Unsteady flow

12. In spot welding, the spacing between two spot weld should not be less than
d
1.5 d
3 d
6 d

13. The power transmitted by a belt drive is maximum when the maximum tension in the belt is __________ the centrifugal tension.
Equal to
Double
Three times
Six times

14. The factors to be considered for production scheduling are
Component design
Route sheet
Time standards
All of these

15. Oil separator in a refrigeration cycle is installed
Before compressor
Between compressor and condenser
Between condenser and evaporator
Between condenser and expansion valve

16. The cavitation in a hydraulic machine is mainly due to
Low velocity
High velocity
Low pressure
High pressure

17. In order to cut mild steel, the cutting angle of chisel should be ________degree.
30
45
50
60

18. A ship with jet propulsion draws water through inlet orifices at right angles to the direction of its motion. The propelling force of the jet is "waVr /g × (Vr - v)".
(where a = Area of the jet, Vr = Relative velocity of the jet and ship = V + v, v = Velocity of the ship, and V = Velocity of the jet issuing from the ship)
Correct
Wrong
There is no Solution
Data is incorrect

19. The boiling point of carbon dioxide is
-20.5
-50
-63.3
-78.3

20. The thrust force will increase with the increase in
Side cutting edge angle
Tool nose radius
Rake angle
End cutting edge angle

     Score =

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