The e.m.f. generated in thermocouples is of the order of _______________?
A.volts
B.millivolts
C.microvolts
D.kilovolts
Category: Engineeeing Mcqs
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
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
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
