1232 + Mcqs in Material Science Page 16 McqOptions

751.	Which of the following factores govern the grain size?
A.	nature and extent of deoxidizers
B.	chemical compositio n of steel
C.	alloying element s
D.	all of the above
Answer» E.

Discussion

752.	Which of the following materials does not have body centered cubic structure?
A.	vanadium
B.	potassium
C.	lithium
D.	calcium
Answer» E.

Discussion

753.	Which of the following materials has body centered cubic structure?
A.	molybdenum
B.	cadmium
C.	glass
D.	zinc
Answer» B. cadmium

Discussion

754.	The structure of common glass is:
A.	amorphous
B.	partially crystallin e
C.	fully crystallin e
D.	none of the above
Answer» B. partially crystallin e

Discussion

755.	The capacit of material to undergo deformation under tension without rupture is known as:
A.	strength
B.	stiffness
C.	toughness
D.	ductility
Answer» E.

Discussion

756.	Any mechanical process that increases the number of dislocations will result in decrease/increase in the electrical resistance of the metal.
A.	decreases
B.	increases
C.	more
D.	none of the above
Answer» C. more

Discussion

757.	Alloying elements of impurities greatly increase the lattice imperfections which decrease/increase the conductivity.
A.	decrease
B.	increase
C.	less
D.	none of the above
Answer» B. increase

Discussion

758.	In -------- dislocation only shear stress field exists.
A.	edge
B.	line
C.	screw
D.	none of the
Answer» D. none of the

Discussion

759.	Cold working increasings:
A.	hardness
B.	ductility
C.	ultimat e tensile
D.	none of the above
Answer» D. none of the above

Discussion

760.	In a screw dislocation Burger's vectore is - ------- to the linear defect but there is distoration of the plane.
A.	parallel
B.	point
C.	edges
D.	none of the above
Answer» B. point

Discussion

761.	A linear disturbance of atomic arrangement, which can move very easily on the slip plane through the crystal is known as ------ --.
A.	twinning
B.	slipping
C.	dislocation
D.	none of the above
Answer» D. none of the above

Discussion

762.	In -------- every atomic plane is involved.
A.	atomic spacin g
B.	slipping
C.	twinning
D.	none of the above
Answer» D. none of the above

Discussion

763.	--------- occure over wide planes.
A.	slip
B.	twinning
C.	point
D.	none of the above
Answer» B. twinning

Discussion

764.	In metals the plastic deformation generally takes place by the process of ---- -----.
A.	twinning
B.	slipping
C.	atomic spacin g
D.	dislocations
Answer» C. atomic spacin g

Discussion

765.	The tiny block formed by the arrangement of small group of atom is called ----- --.
A.	unit cell
B.	space lattice
C.	lattice point
D.	none of the above
Answer» B. space lattice

Discussion

766.	The shear stress required to produce slip on a crystal plane is called the ------ shear stress.
A.	critical resolve d
B.	atomic
C.	cross
D.	none of the above
Answer» B. atomic

Discussion

767.	Chances of crack propagation is more in -- -----.
A.	cold working
B.	hot working
C.	annealing
D.	none of the above
Answer» B. hot working

Discussion

768.	According to Bravais there are ------ possible types of space lattice in the seven basic crystal system.
A.	8
B.	14
C.	20
D.	24
Answer» C. 20

Discussion

769.	Non-random alignment of crystals or molecules is known as ----- orientation.
A.	grain size
B.	atomic
C.	perferred
D.	none of the above
Answer» D. none of the above

Discussion

770.	------ slip is process where by a screw dislocation glides into another slip plane having a slip direction in common with the original slip plane.
A.	dislocations
B.	right angle
C.	cross
D.	none of the above
Answer» D. none of the above

Discussion

771.	In ------dislocation only shear stress field exists.
A.	edge
B.	line
C.	screw
D.	none of the above
Answer» D. none of the above

Discussion

772.	The Burger's vectore is at------- to the edge dislocation line.
A.	parallel
B.	perpendicul a r
C.	right angle
D.	none of the above
Answer» D. none of the above

Discussion

773.	A linear disturbance of atomic arrangement which can move very easily on the slip plane through the crstal is known as -----.
A.	twinning
B.	slipping
C.	dislocation
D.	none of the above
Answer» D. none of the above

Discussion

774.	------- imperfection involves vacancies of pair of ions of opposite charges.
A.	vacancy
B.	schottky
C.	edge
D.	none of the above
Answer» C. edge

Discussion

775.	A ------is the simplest point defect and involves a missing atom within a metal.
A.	point
B.	vacancy
C.	line
D.	none of the above
Answer» C. line

Discussion

776.	In ----- the orientation of the crstal above and below the slip plane is same after deformation as before.
A.	twinning
B.	slip
C.	plastic
D.	none of the above
Answer» C. plastic

Discussion

777.	------- defects are imperfect point like regions in a crystal.
A.	line
B.	point
C.	edge
D.	none of the above
Answer» C. edge

Discussion

778.	------- deformation is the deformation which disappears when the load is removed.
A.	plastic
B.	elastic
C.	crystalline
D.	none of the above
Answer» C. crystalline

Discussion

779.	In metals the plastic deformation generally takes place by the process of ---- ----.
A.	twinning
B.	slipping
C.	vacancy
D.	none of the above
Answer» C. vacancy

Discussion

780.	The change in dimension of foems of matter under the action of applied forces is called---.
A.	elastic
B.	plastic
C.	deformation
D.	none of the above
Answer» D. none of the above

Discussion

781.	-------- is a system of notation of planes within a crystal of space lattice.
A.	space lattice
B.	crystalline
C.	miller indices
D.	identical
Answer» D. identical

Discussion

782.	The ratio of the volume of atoms per unit cell to the total volume occupied by the unit cell called------ --.
A.	co- ordinatio n number
B.	atomi c packin g factor
C.	unit cell
D.	miller indices
Answer» C. unit cell

Discussion

783.	------- is defined as the number of nearest atoms which are directly surrounding a given atom.
A.	lattice
B.	bravais
C.	atomi c packin g factor
D.	co- ordinatio n number
Answer» E.

Discussion

784.	------- parameter means the dimensions of the unit cell in any of the crystallographic arrangements.
A.	identical
B.	nucleus
C.	element
D.	lattice
Answer» E.

Discussion

785.	Every point of a space lattice has ------ surrounding:
A.	atoms
B.	element
C.	lattice
D.	identical
Answer» E.

Discussion

786.	The linear disturbance of atomic arrangment is known as:
A.	imperfectio n s
B.	slip
C.	dislocations
D.	twinning
Answer» D. twinning

Discussion

787.	Recrystallization temperature of aluminium is 150Ëš C and that of copper is:
A.	100Ëš
B.	200Ëš
C.	300Ëš
D.	400Ëš
Answer» C. 300Ëš

Discussion

788.	The process which occures with heating in excess of that used recovery is called:
A.	grain growth
B.	recrystalliz at ion
C.	cold working
D.	hot working
Answer» C. cold working

Discussion

789.	Which of the following metals does not have face centered cubic structure?
A.	copper
B.	silver
C.	tin
D.	lead
Answer» D. lead

Discussion

790.	In crystal imperfections, the lattice sites from which atoms are missing are called:
A.	impurities
B.	vacancies
C.	dislocation
D.	interstitialic i es
Answer» C. dislocation

Discussion

791.	Cold work is done on metals:
A.	below thermal critical range
B.	above thermal critical range
C.	at temperatur e below zero degree centigrade
D.	after slightly warming up the metal in furnace
Answer» B. above thermal critical range

Discussion

792.	The crystal structure of gamma iron is:
A.	cubic
B.	bcc
C.	fcc
D.	hcp
Answer» D. hcp

Discussion

793.	The crystal structure of brass is:
A.	bcc
B.	fcc
C.	hcp
D.	orthorhomb i c
Answer» C. hcp

Discussion

794.	Which of the following elements has hexagonal close packed structure?
A.	aluminium
B.	molybdenum
C.	cadmium
D.	chromium
Answer» D. chromium

Discussion

795.	Atomic packing factore is maximum for:
A.	prism
B.	simple cube
C.	fcc
D.	bcc
Answer» D. bcc

Discussion

796.	There are 2 atoms in a unit cell of:
A.	body centered cubic space lattice
B.	face centered cubic space lattice
C.	close packed hexagonal space lattice
D.	all of the above
Answer» B. face centered cubic space lattice

Discussion

797.	The crystal structure of the following materials is FCC except:
A.	aluminium
B.	magnesium
C.	nickel
D.	copper
Answer» C. nickel

Discussion

798.	A crystal structure in a regular array of atoms is arranged in one of the:
A.	10 space lattices
B.	7 space lattice s
C.	14 space lattices
D.	none of the above
Answer» D. none of the above

Discussion

799.	The metal which has HCP structure is:
A.	silver
B.	iron
C.	magnesium
D.	aluminium
Answer» D. aluminium

Discussion

800.	The structure of SiO2 quartz is:
A.	hcp
B.	bcc
C.	fcc
D.	orthorhomb i c
Answer» B. bcc

Discussion

Explore topic-wise MCQs in Electrical Engineering.

Which of the following factores govern the grain size?

Which of the following materials does not have body centered cubic structure?

Which of the following materials has body centered cubic structure?

The structure of common glass is:

The capacit of material to undergo deformation under tension without rupture is known as:

Any mechanical process that increases the number of dislocations will result in decrease/increase in the electrical resistance of the metal.

Alloying elements of impurities greatly increase the lattice imperfections which decrease/increase the conductivity.

In -------- dislocation only shear stress field exists.

Cold working increasings:

In a screw dislocation Burger's vectore is - ------- to the linear defect but there is distoration of the plane.

A linear disturbance of atomic arrangement, which can move very easily on the slip plane through the crystal is known as ------ --.

In -------- every atomic plane is involved.

--------- occure over wide planes.

In metals the plastic deformation generally takes place by the process of ---- -----.

The tiny block formed by the arrangement of small group of atom is called ----- --.

The shear stress required to produce slip on a crystal plane is called the ------ shear stress.

Chances of crack propagation is more in -- -----.

According to Bravais there are ------ possible types of space lattice in the seven basic crystal system.

Non-random alignment of crystals or molecules is known as ----- orientation.

------ slip is process where by a screw dislocation glides into another slip plane having a slip direction in common with the original slip plane.

In ------dislocation only shear stress field exists.

The Burger's vectore is at------- to the edge dislocation line.

A linear disturbance of atomic arrangement which can move very easily on the slip plane through the crstal is known as -----.

------- imperfection involves vacancies of pair of ions of opposite charges.

A ------is the simplest point defect and involves a missing atom within a metal.

In ----- the orientation of the crstal above and below the slip plane is same after deformation as before.

------- defects are imperfect point like regions in a crystal.

------- deformation is the deformation which disappears when the load is removed.

In metals the plastic deformation generally takes place by the process of ---- ----.

The change in dimension of foems of matter under the action of applied forces is called---.

-------- is a system of notation of planes within a crystal of space lattice.

The ratio of the volume of atoms per unit cell to the total volume occupied by the unit cell called------ --.

------- is defined as the number of nearest atoms which are directly surrounding a given atom.

------- parameter means the dimensions of the unit cell in any of the crystallographic arrangements.

Every point of a space lattice has ------ surrounding:

The linear disturbance of atomic arrangment is known as:

Recrystallization temperature of aluminium is 150Ëš C and that of copper is:

The process which occures with heating in excess of that used recovery is called:

Which of the following metals does not have face centered cubic structure?

In crystal imperfections, the lattice sites from which atoms are missing are called:

Cold work is done on metals:

The crystal structure of gamma iron is:

The crystal structure of brass is:

Which of the following elements has hexagonal close packed structure?

Atomic packing factore is maximum for:

There are 2 atoms in a unit cell of:

The crystal structure of the following materials is FCC except:

A crystal structure in a regular array of atoms is arranged in one of the:

The metal which has HCP structure is:

The structure of SiO2 quartz is: