In case of carbondioxide moulding, the binder used is generally
A.sodium silicate
B.china clay
C.coal dust
D.graphite
Category: Mechanical Engineering Mcqs
Eutectic is
A.a phase transformation in which all the liquid phase transforms on cooling to two solid phases simultaneously
B.A phase transformation which occurs above the glass transition temperature
C.a solid solution of one component in another
D.None of the above
The maximum efficiency of a scres jack having square threads and friction angle of 30 degree will be
A.9%
B.11%
C.20%
D.33%
E.5%
In a thermocouple, the potential between the two junctions is due to the temperature gradient along the conductors in the circuit. This effect is named as
A.Peltier’s effect
B.Thomson’s effect
C.Seebeck effect
D.none of the above
In a steam turbine cycle the lowest pressure occurs in
A.Turbine inlet
B.Boiler
C.Condenser
D.Super-heater
E.Super-heater exit
In taper roller bearing the contact angle is
A.Zero
B.Between 1? and 3?
C.Between 5? and 10?
D.Between 12? and 15?
E.Between 15? and 20?
Which of the following material is viscoelastic in properties?
A.Graphite
B.Rubber
C.Glass
D.Cork
E.None of the above
The air gap between the central electrode and ground electrode of a spark plug is approximately
A.1 cm
B.0.5 cm
C.0.2 cm
D.0.1 cm to 0.06 cm
In an engine radiator, heat is transferred by
A.Conduction
B.Convection
C.Radiation
D.Conduction and convection
E.None of the above
For controlling algae, the chemical generally used is
A.alum
B.lime
C.copper sulphate
D.bleaching powder
