In case of worm and worm-wheel the maximum efficiency is obtained when
A.Worm is driver
B.Worm wheel is driver
C.Either of the worm or worm wheel is a driver
D.Depends on other factors
E.None of the above
Category: Engineeeing Mcqs
Metal moulds are used in all of the following EXCEPT:
A.Die casting process
B.Investment casting
C.Permanent mould casting
D.Centrifugal casting
In ball bearing steels, chromium percentage is normally in the range
A.1 – 2 percent
B.2 – 3 percent
C.3 – 5 percent
D.5 – 10 percent
E.14 – 16 percent
Mixing coal dust with moulding sand results in
A.blackening of the mould
B.strong mould
C.good air venting
D.none of the above
In case of clutch if the springs become weak, the remedy lies in
A.Tightening further the springs
B.Interchanging the springs
C.Retempering the springs
D.Replacing the springs
E.Any of the above
In the ideal Rankine cycle heat is added at constant
A.temperature
B.pressure
C.volume
D.entropy
All of the following are intensive properties EXCEPT:
A.Mass
B.Density
C.Viscosity
D.Temperature
Hot spots are generally found in castings
A.having abrupt variation in section
B.with uniform cross-section
C.symmetrical about two axes
D.small in weight but large in volume
The knocking in S.I. engines is characterised by sudden auto-ignition of the change
A.nearest to the spark plug
B.farthest away from the spark plug
C.in the middle from the spark plug
D.none of the above
