Related Questions

The temperature at which ferromagnetic alpha iron transforms to paramagnetic alpha iron is
A 770°C
B 910°C
C 1050°C
D Below recrystallization temperature
Paramagnetic alpha iron changes to gamma iron at
A 770°C
B 912°C
C 1440°C
D 1539°C
Quartz crystal is most commonly used in crystal oscillators because ___________
A It has superior electrical properties
B It is easily available
C It is quite inexpensive
D None of the above
The crystal oscillator frequency is very stable due to ___________ of the crystal
A Rigidity
B Vibrations
C Low Q
D High Q
If the crystal frequency changes with temperature, we say that crystal has ___________ temperature coefficient
A Positive
B Zero
C Negative
D None of the above
Ferromagnetic alpha iron exists in temperature range of
A Below 723°C
B 770 to 910°C
C 910 to 1440°C
D 1400 to 1539°C
Alpha iron is stable __________ °C.
A Above 1403
B Upto 910
C Above 1800
D Between 910 & 1403
The type of space lattice found in alpha-iron is
A Face centered cubic space lattice
B Body centered cubic space lattice
C Close packed hexagonal space lattice
D None of these
The crystal structure of gamma iron is
A Body centered cubic
B Face centered cubic
C Hexagonal close packed
D Cubic structure
Iron is a useful metal. Here iron is
A an adjective
B a noun
C an adverb
D a verb

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