Related Questions

Which of the following is not used as the ceramic material in 'cermets'?
A Silicides
B Oxides
C Carbides
D Nitrides
Cermets are
A Composite material containing both ceramic & metallic constituents
B Having high strength & resistance to high temperature
C Used in space vehicles, missiles & nuclear energy plants
D All of the above
Cermets are used for making
A Cutting tools
B Abrasives
C Both A & B
D Neither A nor B
The inventory of raw materials included in the working capital is usually about __________ months supply of raw materials valued at delivery prices.
A One
B Three
C Six
D Twelve
The transition temperature at which all the ferromagnetic materials become paramagnetic materials is termed as the 'Curie temperature'. Its value for cobalt is __________ °C.
A 768
B 1127
C 1359
D 1480
Thermoplastic materials are those materials which
A Do not become hard with the application of heat and pressure and no chemical change occurs
B Are flexible and can withstand considerable wear under suitable conditions
C Are formed into shape under heat and pressure and results in a permanently hard product
D Are used as a friction lining for clutches and brakes
In drilling softer materials, the cutting speed is ___________ as compared to harder materials.
A Same
B Low
C High
D None of these
Certain type of materials generates an electrostatic charge or voltage when mechanical force is applied across them. Such materials are called
A Piezo-electric
B Photo-electric
C Thermo-electric
D Photo-resistive
Hysteresis loop in case of magnetically hard materials is more in shape as compared to magnetically soft materials.
A circular
B triangular
C rectangular
D none of the above
In a prismatic member made of two materials so joined that they deform equally under axial stress, the unit stresses in two materials are
A Equal
B Proportional to their respective moduli of elasticity
C Inversely proportional to their moduli of elasticity
D Average of the sum of moduli of elasticity

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