A correction of LMTD is necessary in case of
A.Parallel flow heat exchanger
B.Counter current heat exchanger
C.Cross flow heat exchanger
D.All of the above
E.None of the above
Category: Engineeeing Mcqs
The octane rating of petrol commercially available is usually
A.85 – 90
B.90 – 100
C.100 – 105
D.110 – 125
E.125 – 140
The boundary condition for steady flow of an ideal fluid is that the
A.Velocity is zero at the boundary
B.Velocity component normal to the boundary is zero
C.Velocity component tangent to the boundary is zero
D.Boundary surface must be stationary
E.Continuity equation must be satisfied
For glass wool the thermal conductivity varies from sample to sample because of variations in
A.Structure
B.Composition
C.Density
D.Porosity
E.All of the above
Chips with built up edge are produced while machining
A.Ductile material
B.Brittle material
C.Cast materials
D.Hard materials
E.Non-ferrous materials
Power law behaviour is pseudoplastic for
A.n = 1
B.n < 1
C.n > 1
D.n = 0
The dielectric strength of rubber is about
A.3 kV/mm
B.30 kV/m
C.30 kV/cm
D.None of the above
The Schmidt number (NSc) is defined as
A.?/DAB
B.?/?DAB
C.??/DAB
D.?DAB/?
Which of the following refrigerant is the cheapest?
A.Ammonia
B.Freon 12
C.Freon 22
D.Methyl chloride
E.Air
Inflation pressure for truck tyres is generally
A.1 kg/cm2
B.2.2 kg/cm2
C.3 kg/cm2
D.6 kg/cm2
