Related Questions

The commonly used material for shielding is
A Lead or concrete
B Lead and tin
C Graphite or cadmium
D Thick galvanized sheets
The material most commonly used for shielding is
A Carbon
B Lead
C Concrete
D All of these
Indicate which of the following material does not retain magnetism permanently.
A Soft iron
B Stainless steel
C Hardened steel
D None of the above
What is the type of shielding gas for GTAW (Gas Tungsten Arc Welding) used for carbon steels only called?
A Argon H2
B Argon CO2
C Argon Helium
D Helium
(i)Participation involves more than the formal sharing of decisions. (ii)through anticipation , individuals . or organizations consider trends and make plans , shielding institutions from trauma of learning by shock. (iii) Innovative learning involves both anticipation and participation . (iv) It is an attitude characterized by cooperation. dialogue and empathy.
A (ii) + (iii) + (i) + (iv)
B (i) + (ii) + (iv) + (iii)
C (iv) + (i) + (iii) + (ii)
D (iii) + (ii) + (i) + (iv)
The main interest of shielding in nuclear reactor is protection against
A X-rays
B Infrared rays
C Neutrons and gamma rays
D Electrons
The thickness of metallic shielding on cables is usually
A 0.04 mm
B 0.2 to 0.4 mm
C 3 to 5 mm
D 40 to 60 mm
Addition of __________ to the steel helps in increasing the residual magnetism in steel used for making magnets.
A Chromium
B Nickel
C Tungsten
D Cobalt
Magnetism of a magnet can be destroyed by
A heating
B hammering
C by inductive action of another magnet
D by all above methods
Which one of the following phrases best describes residual magnetism?
A Magnetism that remains in the core of an electromagnet after the current through the coil is turned off
B The force of attraction between the poles of a permanent and temporary magnetic field
C The amount of magnetic flux that is not confined to the core material of an electromagnet
D The circular magnetic field that surrounds a conductor carrying a current
E None of the above

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