Related Questions

Addition of lead and bismuth to aluminium results in
A Improvement of casting characteristics
B Improvement of corrosion resistance
C One of the best known age and precipitation hardening systems
D Improving machinability
Electric fuse is an alloy of
A Tin and lead
B Zinc and lead
C Copper and iron
D Carbon and tin
H.R.C. fuse, as compared to a rewirable fuse, has
A no ageing effect
B high speed of operation
C high rupturing capacity
D all of the above
Fuse wire is made of an alloy of
A Tin and Lead
B Tin and Copper
C Lead and Copper
D Copper and Silver
The metallic sheath may be made of lead or lead alloy or of aluminum.
A Yes
B No
On which of the following effects of electric current a fuse operates?
A Photoelectric effect
B Electrostatic effect
C Heating effect
D Magnetic effect
The fuse in our domestic electric circuit melts when there is a high rise in
A Inductance
B Current
C Resistance
D Capacitance
Constantan an alloy used in thermocouples is an alloy of
A Copper and tin
B Copper and zinc
C Copper and iron
D Copper and nickel
Perminvar alloy having constant permeability is an alloy of
A Nickel, copper and iron
B Nickel, copper and zinc
C Copper, nickel and antimony
D Iron, zinc and bismuth
The partial pressure of each constituent present in an alloy is __________ the total vapor pressure exerted by the alloy.
A Less than
B Equal to
C More than
D Either B or C; depends on the type of alloy

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