Invar is a _______________?
A.iron-nickel alloy containing about 36% nickel
B.copper-nickel alloy containing about 36% nickel
C.zinc-nickel alloy containing about 36% nickel
D.tin-nickel alloy containing about 36% nickel
Category: Chemical Engineering Mcqs
Specific conductance in micro-mho/cm of a good quality distilled water is _________________?
11A.0.01
B.0.1
C.1
D.10
For platinum thermocouples lead wires are made of _______________________?
A.iron and copper
B.copper and copper-nickel alloy
C.nickel and iron
D.tin and nickel.
Specific conductance in micro-mho/cm of a excellent quality raw water is __________________?
A.100
B.1000
C.10
D.0.01
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
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
