Related Questions

In an iron cored coil the iron core is removed so that the coil becomes an air cored coil. The inductance of the coil will
A Increase
B Decrease
C Remain the same
D Initially increase and then decrease
The effective resistance of an iron-cored choke working on ordinary supply frequency is more than its true resistance because of
A Iron loss in core
B Skin effect
C Increase in temperature
D Capacitive effect between adjacent coil turns
Self generating type transducers are ___________ transducers.
A Active
B Passive
C Secondary
D Inverse
When a hole or cavity to be cored is not in line with the parting surface, then a ________ is used.
A Horizontal core
B Vertical core
C Drop core
D Balanced core
The steel used in steel cored conductors is usually
A Alloy steel
B Stainless steel
C Mild steel
D High speed steel
An important property of malleable cast iron in comparison to grey cast iron is the high
A Compressive strength
B Ductility
C Carbon content
D Hardness
A ferrite core has less eddy current loss than an iron core because
A Ferrites have high resistance
B Ferrites are magnetic
C Ferrites have low permeability
D Ferrites have high hysteresis
K produces 100 parts twice as fast as G does. G produces 100 parts in 40 minutes. If each produces parts at a constant rate, how many parts will K produces in 6 minutes.
A 30
B 25
C 20
D 15
The size of inlet valve of an engine in comparison to exhaust valve is
A More
B Less
C Same
D More/less depending on capacity of engine
If the catalyst pore size is small in comparison with the mean free path, collisions with the pore wall controls the process'. The diffusivity under this condition is called 'Knudsen diffusivity', which is affected by the
A Pressure
B Temperature
C Both A & B
D Neither A nor B

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