The crystal structure of most of the common metals is

Most of the common metals have __________ crystal structure.

A

Cubic

B

Hexagonal

C

Orthorhombic

D

None of these

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

Most of the common metals have _________ structure.

A

Linear

B

Hexagonal

C

Orthorhombic

D

Cubic

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

Which of the following metals forms an amalgam with other metals?

A

Tin

B

Mercury

C

Lead

D

Zinc

Ceramic nuclear metals compared to solid nuclear metals have

A

higher melting points

B

low strength at high temperature

C

more chances of radiation damage

D

poorer corrosion resistance

There are thirteen metals which are treated as pollutants. Which of the following metals is not a pollutant?

A

Mercury

B

Arsenic

C

Aluminium

D

Lead

Which of the following metals form an amalgam with other metals ?

A

Lead

B

Tin

C

Zinc

D

Mercury

An important geometrical quantity in the cutting of metals which can be used as a criterion for machinability of metals is

A

Cutting speed

B

Feed rate

C

Shear angle

D

Tool geometry

The crystal structure of most of the common metals is

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