The generation of e.m.f. in thermocouples is fundamentally explained by
A.Ohms law
B.Stefan-Boltzmans law
C.Seebeck effect
D.Joule heating effect.
Category: Engineeeing Mcqs
Which of the following area of work needs lowest noise level?
A.Gymnasiums
B.Lecture halls
C.Library
D.Kitchens
The air standard efficiency of a Diesel engine depends on
A.Compression ratio
B.Speed
C.Torque
D.Cetane value of fuel used
E.Thermodynamic properties of working fluid
Select the wrong statement. Compared to platinum catalyst vanadium pentoxide catalyst used in contact process for the manufacture of H2SO4
A.is relatively immune to poisons
B.requires low initial investment and 5% replacement per year
C.requires low O2/SO2 to give economic conversion
D.requires dilute SO2 input (7-10%)
The speed of sound through human body is around
A.344 m/s
B.688 m/s
C.1560 m/s
D.3120 m/s
1 bar pressure is nearly equal to
A.1 mm Hg
B.13.4 mm Hg
C.100 mm Hg
D.735 mm Hg
E.750 mm Hg
Select the three pressures that are not equivalent
A.14.696 psi 29.92 in. Hg 33.94 ft H2O
B.14.696 psi 29.92 in. Hg 1.01325 bar
C.29.92 in Hg 33.94 ft H2O 1.01325 x 105 N/m2
D.29.92 in Hg 2116 psf 1.01325 Pa.
When silicon is added in the cast iron 13-17 percent is given an alloy which is
A.Very soft
B.Easily machinable
C.Acid and corrosion resistant
D.It is not possible to have such high percentage of silicon
E.Powder casted
Gases have poor
A.Reflectivity
B.Absorptivity
C.Transmissivity
D.Absorptivity + transmissivity
E.Reflectivity + absorptivity
The defect responsible for the phenomenon of slip, by which most metals deform plastically, is known as
A.Fracture
B.Twinning
C.Dislocation
D.Strain hardening
E.None of the above
