At room temperature [H+] [OH-] is equal to ________________?
A.10-7 moles/litre
B.10-14 moles/litre
C.10-10 moles/litre
D.10-16 moles/litre
Category: Engineeeing Mcqs
If dross and slag along with the liquid metal reach the mould cavity they produce the defect known as_______________?
A. Misrun
B. Inclusions
C. Blow holes
D. All of the above
Thermistor is made of __________________?
A. Oxides or salts of metals
B. Metal
C. Two different metals
D. Two similar metal wires.
Conductivity of platinum __________________?
A. Remains constant with change in temperature
B. Increases with increase in temperature
C. Decreases with increase in temperature
D. Increases linearly with increase in temperature
Bolometer works on the principle of__________________?
A.change of electrical resistance with change in temperature
B.volumetric expansion of mercury with increase in temperature
C.increase of vapour pressure with increase in temperature
D.linear expansion with increase in temperature
Thermopile is used for the measurement of ___________________?
A.current
B.e.m.f.
C.temperature
D.flow rate
For a given thermocouple E.M.F. generated __________________?
A.depends on the tempaterature of hot junction
B.depends on the temperature of cold junction
C.depends on the temperature difference between hot and cold junctions
D.is constant for all temperature differences between hot and cold junctions
Slag and dross can be removed by ________________?
A.skimming from the molten metal
B.using bottom pouring ladle
C.using pouring basin in place of a pouring cup
D.any of the above
The general gas equation is_________________?
A.PV = RT
B.PV = mRT
C.PV = (RT)m
D.PVn = constant
E.PV = constant
The units of specific conductance are_____________________?
A.ohm/cm
B.mho/cm
C.ohm-cm
D.mho-cm
