55 + Mcqs in Raman Scattering for Fiber Analysis Page 1 McqOptions

1.	In Raman spectroscopy, greater complication of interaction provides more
A.	details
B.	dimensional information
C.	directional information
D.	chemical information
Answer» D. chemical information

Discussion

2.	Regions accessible to heavy water are
A.	crystalline regions
B.	non crystalline region
C.	dark region
D.	light region
Answer» C. dark region

Discussion

3.	Variation in absorption against wavelength can be plotted on
A.	wave spectrometer
B.	infrared spectrometer
C.	wavelength spectrometer
D.	wavenumber spectrometer
Answer» C. wavelength spectrometer

Discussion

4.	Fundamental oscillations occur at wavenumbers less than
A.	1000
B.	2000
C.	3000
D.	4000
Answer» E.

Discussion

5.	Absorption frequency for example of carbon-hydrogen bond in a terminal group as compared to chain is
A.	same
B.	different
C.	variable
D.	strong
Answer» C. variable

Discussion

6.	With help of infrared absorption, important thing that can be determined is
A.	chemical formula
B.	chemical properties
C.	physical properties
D.	all of above
Answer» B. chemical properties

Discussion

7.	In infrared spectroscopy, radiation absorbed at certain frequencies yield structural information having wavelengths between
A.	1 and 15 micrometer
B.	5 and 15 micrometer
C.	15 and 25 micrometer
D.	15 and 35 micrometer
Answer» B. 5 and 15 micrometer

Discussion

8.	Frequency of photons shifts electrons from one state to another in
A.	Raman spectroscopy
B.	spectroscopy
C.	crystallization
D.	vaporization
Answer» B. spectroscopy

Discussion

9.	Oscillations of atom vary from maximum to minimum at right angle if infrared radiation is
A.	non polarized
B.	polarized
C.	zero
D.	negligible
Answer» C. zero

Discussion

10.	Effects of photon energy are manifestated in
A.	dark region
B.	light region
C.	invisible region
D.	visible region
Answer» E.

Discussion

11.	In shorter chain paraffin hydrocarbons, double peak is found in
A.	liquid state
B.	solid state
C.	crystalline state
D.	both b and c
Answer» E.

Discussion

12.	Bands other than absorption band are characteristics of
A.	non crystalline nature
B.	polarized nature
C.	chain fold
D.	non polarized nature
Answer» D. non polarized nature

Discussion

13.	In case of short fibers, there's a loss of
A.	strength
B.	twists
C.	friction
D.	hold
Answer» B. twists

Discussion

14.	In linear polymer fibers, continuity is provided by
A.	chained molecules
B.	small chain molecules
C.	long chain molecules
D.	moderate molecules
Answer» D. moderate molecules

Discussion

15.	Molecular information cannot be obtained from
A.	scattering
B.	elastic scattering
C.	light scattering
D.	moderate scattering
Answer» C. light scattering

Discussion

16.	Absorption bands in infrared spectrum of nylon are characteristics of
A.	crystalline nature
B.	non crystalline nature
C.	polarized nature
D.	non polarized nature
Answer» B. non crystalline nature

Discussion

17.	At higher wavenumbers, near optical frequency, absorptions occur due to the
A.	harmonics of fundamental frequency
B.	optical frequency
C.	wave frequency
D.	high frequency
Answer» B. optical frequency

Discussion

18.	Wavenumber at which absorption normally occurs depends on the
A.	nature of atoms
B.	bond between atoms
C.	both a and b
D.	frequency
Answer» D. frequency

Discussion

19.	Use of Raman spectroscopy in study of aramid, polyester and carbon fibre is provided by
A.	John
B.	David
C.	Young
D.	Nathan
Answer» D. Nathan

Discussion

20.	Lateral forces help in holding molecules together and give them
A.	elasticity
B.	cohesion
C.	tightness
D.	softness
Answer» C. tightness

Discussion

21.	Larger scale molecular information can be obtained from
A.	elastic scattering
B.	scattering
C.	moderate scattering
D.	light scattering
Answer» E.

Discussion

22.	Freedom of molecular movement gives necessary
A.	extensibility
B.	openness
C.	moisture and dye absorption
D.	all of above
Answer» E.

Discussion

23.	By using polarized infrared, orientation can be determined in
A.	one region
B.	two regions
C.	three regions
D.	four regions
Answer» C. three regions

Discussion

24.	Presence of liquid and solid state is evidence of
A.	non polarized material
B.	polarized material
C.	non crystalline material
D.	crystalline material
Answer» E.

Discussion

25.	Polyethene has a strong double peak at
A.	725
B.	625
C.	825
D.	713
Answer» B. 625

Discussion

26.	While plotting variation in absorption and wavelength, point where frequency of electromagnetic waves corresponds to natural frequency of vibration, is called as
A.	peak
B.	low point
C.	center
D.	variation
Answer» B. low point

Discussion

27.	Transverse strength is much less important because of
A.	fineness of fibers
B.	rigidity
C.	hardness
D.	bonding
Answer» B. rigidity

Discussion

28.	Technique in which material is exposed to vapors of heavy water is applied to
A.	viscose rayon
B.	viscose
C.	forms of cellulose
D.	both a and c
Answer» E.

Discussion

29.	Raman spectroscopy has become an important tool for studying fibre structure because of the
A.	Raman spectroscope
B.	Raman microscope
C.	Raman machine
D.	Raman electroscope
Answer» C. Raman machine

Discussion

30.	Identification of presence of certain groups in a molecule is aided by use of
A.	absorption
B.	infrared absorption
C.	molecule absorption
D.	heat absorption
Answer» C. molecule absorption

Discussion

31.	Variation in absorption spectrum with polarization direction can be used to investigate degree of
A.	orientation of ions
B.	orientation of atoms
C.	orientation of molecules
D.	orientation of compound
Answer» D. orientation of compound

Discussion

32.	A mass of raw cotton consists of
A.	long fibers
B.	fine fibers
C.	irregular and tangled up fibers
D.	all of above
Answer» E.

Discussion

33.	At higher wavenumbers and weaker absorptions material that can be studied should be
A.	plastic
B.	nylon
C.	thick
D.	thin
Answer» D. thin

Discussion

34.	When electromagnetic waves interact with matter, they are
A.	scattered
B.	scattered and absorbed
C.	reflected and absorbed
D.	reflected
Answer» C. reflected and absorbed

Discussion

35.	Characteristic spectrum helps in determining presence of
A.	water in fibers
B.	particle in fibre
C.	chemical in fibre
D.	mineral in fibre
Answer» B. particle in fibre

Discussion

36.	Photons that are in elastically scattered gives results to
A.	moderate scattering
B.	elastic scattering
C.	Raman spectroscopy
D.	moderate spectroscopy
Answer» D. moderate spectroscopy

Discussion

37.	Fundamental oscillations giving strong absorptions can be studied in
A.	thin films or fibers
B.	thick films or fibers
C.	plastic
D.	nylon
Answer» B. thick films or fibers

Discussion

38.	Advantage of infrared absorption is that it is influenced by all the
A.	molecules
B.	atoms
C.	ions
D.	forces
Answer» B. atoms

Discussion

39.	Oriented arrangement of molecules is achieved with help of
A.	lateral forces
B.	lateral compression
C.	movement
D.	friction
Answer» B. lateral compression

Discussion

40.	When fibers are parallelized and lined up, twists are added which leads to
A.	lateral compression
B.	frictional force
C.	strong hold
D.	all of above
Answer» E.

Discussion

41.	Reciprocal of wavelength is
A.	wavenumber
B.	wave
C.	wavedensity
D.	wavelength
Answer» B. wave

Discussion

42.	One technique that is useful determining crystalline and non crystalline regions of material is
A.	exposing material to the vapor of heavy water
B.	exposing material to the vapor of light water
C.	vaporization
D.	crystallization
Answer» B. exposing material to the vapor of light water

Discussion

43.	It should be taken care of that twists must not bind fibers in a solid rod because it will destroy the
A.	flexibility
B.	porosity and flexibility
C.	rigidity and flexibility
D.	rigidity
Answer» C. rigidity and flexibility

Discussion

44.	Detailed information about only crystalline regions of fibre is given by
A.	diffraction
B.	x-ray diffraction
C.	gamma diffraction
D.	beta diffraction
Answer» C. gamma diffraction

Discussion

45.	Presence of substances in a mixture can be identified by observing
A.	characteristic spectrum
B.	light spectrum
C.	physical spectrum
D.	chemical spectrum
Answer» B. light spectrum

Discussion

46.	Polarized infrared is also used to find direction in which a particular group points in
A.	atom
B.	ion
C.	molecule
D.	compound
Answer» D. compound

Discussion

47.	Because of influence of surroundings, absorption may occur in
A.	crystalline regions
B.	non crystalline region
C.	central region
D.	different regions
Answer» B. non crystalline region

Discussion

48.	Essential requirement in fibre structure is
A.	ensuring continuity
B.	strength
C.	bonding
D.	all of above
Answer» E.

Discussion

49.	Fundamental oscillations occurring at low wavenumbers give
A.	weak absorptions
B.	strong absorptions
C.	negligible absorptions
D.	moderate absorptions
Answer» C. negligible absorptions

Discussion

50.	In shorter chain paraffin hydrocarbons, only one component is present in
A.	crystalline state
B.	gas state
C.	liquid state
D.	solid state
Answer» D. solid state

Discussion

Explore topic-wise MCQs in Textile Engineering.

In Raman spectroscopy, greater complication of interaction provides more

Regions accessible to heavy water are

Variation in absorption against wavelength can be plotted on

Fundamental oscillations occur at wavenumbers less than

Absorption frequency for example of carbon-hydrogen bond in a terminal group as compared to chain is

With help of infrared absorption, important thing that can be determined is

In infrared spectroscopy, radiation absorbed at certain frequencies yield structural information having wavelengths between

Frequency of photons shifts electrons from one state to another in

Oscillations of atom vary from maximum to minimum at right angle if infrared radiation is

Effects of photon energy are manifestated in

In shorter chain paraffin hydrocarbons, double peak is found in

Bands other than absorption band are characteristics of

In case of short fibers, there's a loss of

In linear polymer fibers, continuity is provided by

Molecular information cannot be obtained from

Absorption bands in infrared spectrum of nylon are characteristics of

At higher wavenumbers, near optical frequency, absorptions occur due to the

Wavenumber at which absorption normally occurs depends on the

Use of Raman spectroscopy in study of aramid, polyester and carbon fibre is provided by

Lateral forces help in holding molecules together and give them

Larger scale molecular information can be obtained from

Freedom of molecular movement gives necessary

By using polarized infrared, orientation can be determined in

Presence of liquid and solid state is evidence of

Polyethene has a strong double peak at

While plotting variation in absorption and wavelength, point where frequency of electromagnetic waves corresponds to natural frequency of vibration, is called as

Transverse strength is much less important because of

Technique in which material is exposed to vapors of heavy water is applied to

Raman spectroscopy has become an important tool for studying fibre structure because of the

Identification of presence of certain groups in a molecule is aided by use of

Variation in absorption spectrum with polarization direction can be used to investigate degree of

A mass of raw cotton consists of

At higher wavenumbers and weaker absorptions material that can be studied should be

When electromagnetic waves interact with matter, they are

Characteristic spectrum helps in determining presence of

Photons that are in elastically scattered gives results to

Fundamental oscillations giving strong absorptions can be studied in

Advantage of infrared absorption is that it is influenced by all the

Oriented arrangement of molecules is achieved with help of

When fibers are parallelized and lined up, twists are added which leads to

Reciprocal of wavelength is

One technique that is useful determining crystalline and non crystalline regions of material is

It should be taken care of that twists must not bind fibers in a solid rod because it will destroy the

Detailed information about only crystalline regions of fibre is given by

Presence of substances in a mixture can be identified by observing

Polarized infrared is also used to find direction in which a particular group points in

Because of influence of surroundings, absorption may occur in

Essential requirement in fibre structure is

Fundamental oscillations occurring at low wavenumbers give

In shorter chain paraffin hydrocarbons, only one component is present in