At critical point the enthalpy of vaporisation is
A.Only dependent on temperature
B.Zero
C.Maximum
D.Minimum
E.None of the above
Category: Mechanical Engineering Mcqs
The flux used in blast furnace while melting iron ore is
A.Carbon
B.Oxygen
C.Sodium chloride
D.Lime stone
E.Bauxite
A joint sector undertaking
A.Is jointly managed by several shareholders
B.Is jointly owned by only two directors
C.In jointly owned by State and Central Governments
D.Is jointly owned by private parties and Government
E.None of the above
The noise level due to auto horn may be of the order of
A.110 dB
B.80 dB
C.50 dB
D.35 dB
In Brinell hardness testing, while determining hardness of aluminium
A.Indenting ball of smaller diameter is used
B.Time of loading is reduced
C.Load on the indenter is reduced
In furan process, furan resins are primarily used as
A.binders
B.chemicals for exothermic reactions
C.fluxes
D.none of the above
The chemical composition of coal is given by
A.Proximate analysis
B.Ultimate analysis
C.Orsat analysis
D.All of the above
E.None of the above
Polystrene at room temperature is
A.Brittle
B.Malleable
C.Ductile
D.Soft
HRC fuses provide best protection against
A.Short circuits
B.Ligntning
C.Sparking
D.Fire
E.All of the above
Which of the following is ‘acceptor’ impurity for semi-conductor?
A.Arsenic
B.Phosphorous
C.Boron
D.Antimony
E.All of the above
