MMS - Unit -1 Objective Questions

      LAKIREDDY BALI REDDY COLLEGE OF ENGINEERING (AUTONOMOUS)

Department of Mechanical Engineering

Metallurgy and Material Science

Unit- 1 Objective Questions

 

1	The type of bonding present in metals is								[a   ]
	a). Metallic bonding	b). Ionic bonding	c). Covalent bonding					d).None of the above
2	The smallest unit which represents the arrangement of atoms in a crystalline material is known as								[b   ]
	a). Amorphous	b). Unit Cell	c).  Allotropy					d). None
3	The ability of materials to be drawn into sheets is known as								[   d]
	a). Ductility	b). Brittleness	c). Resilience					d). Malleability
4	The existence of a material in more than one crystalline form is known as								[   d]
	a). Space Lattice	b). Monopoly	c).  Isotropy					d). Allotropy
5	On what bases, solids are classified into crystalline and amorphous materials								[ d  ]
	a).Number of atoms	b).Structure of materials	c).Atomic charge					d).Arrangement of atoms
6	The effect of grain size of the material is expressed in terms of __________ equation.								[a  ]
	a). Hall Petch	b). Continuity	c).  Homogeneous					d). None
7	Atomic packing factor for B.C.C structure								[ c  ]
	a). 1.02	b). 0.52	c).  0.68					d). 0.74
8	Atomic structure deals with								[  c ]
	a). About atoms and behavior	b). Molecules corresponding to atoms		c). Arrangement of atoms in a material			d). Structure of materials
9	Atomic packing factor for S.C.S structure								[ b  ]
	a). 1.02	b). 0.52		c).  0.68			d). 0.74
10	In the interstitial solid solutions, the ……atoms occupy the space between the ……atoms.								[  a ]
	a).Solute, Solvent	b).Solvent, Solute		c). Both a, b			d). None
11	The alloy in which the atoms of solute are distributed in solvent and has same structure as that of solvent is known as								[ a  ]
	a). Solid solution	b). Electron compound		c).  Mixture			d). None
12	According to Hume – Rothery’s rules, what is the favorable atomic size factor for solid solution formation?								[   b]
	a). less than 10%	b).less than 15%		c). More than 15%			d). less than 20%
13	The processes of transformation of material from liquid state to solid state is known as								[  a ]
	a). Crystallization	b). Nucleation		c).  Grain Boundary			d). None
14	Small grain size  materials has								[ b  ]
	a). low strength	b). High Strength			c). Both a &b	d). none
15	The crystallization in metals consists of								[   ]
	a). Nucleation	b). Grain Growth			c).  Both a and b	d). None
16	Atomic packing factor for H.C.P structure								[   d]
	a). 0.59	b). 0.62			c). 0.77	d). 0.74
16	What is the necessity of alloying								[  d ]
	a). Enhance tensile strength	b). Modify color			c). Provide better castibility	d). All the above
17	The conditions that favour the formation of solid solutions is								[   c]
	a). lever rule	b). Gibbs phase rule			c). Hume Rothery’s rule	d). None
18	Cooling curve is obtained by plotting								[  b ]
	a). Alloying element vs temperature	b). Temperature Vs Time			c). Time Vs Composition	d). None of the above
19	The grain size of a material can be measured by __________ method.								[  d]
	a). Comparison Method	b). Heyn’s Intercept Method			c). Jefferies Plaimetric Method	d). All
20	The major element present in solid solution is known as								[  b]
	a). Solute	b). Solvent			c). Alloying element	d). All

 

 

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