LECTURER IN TEXTILE TECNOLOGY – (NCA) – (CAT NO – 430/2017) – TECHNICAL EDUCATION

PROVISIONAL ANSWER KEY
Question Paper Code: 39/2019/OL
Category Code: 430/2017
Exam: Lecturer in Textile Technology(NCA)
Medium of Question: English
Date of Test 27-08-2019
Department Technical Education
Alphacode A
Question1:-The power consumed by an ac series circuit is maximum when its power factor is
A:-0
B:-1
C:-0.5
D:-0.8
Correct Answer:- Option-B
Question2:-The protective measure to avoid electric shock while touching electrical appliances is
A:-Switch
B:-Fuse
C:-Lightning arrester
D:-Earthing
Correct Answer:- Option-D
Question3:-What is the unit of apparent power?
A:-Watt-hour
B:-Watt-sec
C:-VA
D:-Watts
Correct Answer:- Option-C
Question4:-In an R-C series circuit, the voltage across each element is 50V. The applied voltage is —–
A:-100V
B:-70.71v
C:-57.23V
D:-50V
Correct Answer:- Option-B
Question5:-What is the effective resistance of a parallel combination of 2Ω, 3Ω and 6Ω
A:-1 Ω
B:-11 Ω
C:-2 Ω
D:-3 Ω
Correct Answer:- Option-A
Question6:-Choose the correct statement
A:-The CFL bulb is an incandescent one.
B:-LED bulbs are more efficient than CFL bulbs in terms of power and life.
C:-LED bulbs are cheaper than CFL bulbs
D:-CFL bulbs remain cool, when operated
Correct Answer:- Option-B
Question7:-Which of the following is not a constituent of an electro mechanical relay?
A:-Spring
B:-Pivot
C:-Armature
D:-Transformer
Correct Answer:- Option-D
Question8:-The 8051 micro controller has a data memory of
A:-128 byte RAM
B:-128 byte ROM
C:-128 kilobyte RAM
D:-128 kilobyte ROM
Correct Answer:- Option-A
Question9:-The modulation used in GSM is
A:-Gaussian Minimum Shift Keying (GMSK)
B:-Amplitude Shift Keying (ASK)
C:-Binary Phase Shift Keying (BPSK)
D:-Quaternary Phase Shift Keying (QPSK)
Correct Answer:- Option-A
Question10:-Which of the following e waste component poses a health hazard?
A:-Lead
B:-Mercury
C:-Cadmium
D:-All of the above
Correct Answer:- Option-D
Question11:-In internal combustion engine, the total energy losses due to pumping and friction converted into power is
termed as
A:-Brake power
B:-Indicated power
C:-Friction power
D:-Total engine power
Correct Answer:- Option-C
Question12:-Which among the following statement is correct?
A:-In four-stroke engines, the cooling and lubrication requirement is lesser than in two-stroke engines.
B:-A lighter flywheel is needed for four-stroke engines than two-stroke engines.
C:-In two-stroke engines, volumetric efficiency is more due to greater time of induction.
D:-In four-stroke engines, in each revolution of the crankshaft, four power strokes are obtained.
Correct Answer:- Option-A
Question13:-The basic function of clutch is to
A:-support a moving element and to confine its motion
B:-transmit power from one shaft to other over considerable distances
C:-measure forces and energy
D:-control flow of mechanical power within a machine
Correct Answer:- Option-D
Question14:-In a thermal (steam) power plant, the feed water is preheated in ——–
A:-Air preheater
B:-Economiser
C:-Condenser
D:-Boiler
Correct Answer:- Option-B
Question15:-In a hydroelectric power plant, the level of water stored in reservoir is known as ——
A:-Hydraulic head
B:-Tail water level
C:-Headrace
D:-Spillway level
Correct Answer:- Option-C
Question16:-A matrix A is said to be singular if
A:-lAl`!=0`
B:-lAl =0
C:-`A^(T) =A`
D:-`A^(-1)=A`
Correct Answer:- Option-B
Question17:-Let A = `[[1,2,3],[0,5,0],[2,4,3]].
The cofactor is 5 is
A:-0
B:-6
C:-3
D:–3
Correct Answer:- Option-D
Question18:-If `Delta_(1)= [[1,0,0],[2,3,0],[-1,5,-3]] ` and `Delta_(2)=[[-3,5,-1],[0,3,2],[0,0,1]]` , then
A:-`Delta_(1)= 2Delta_(2)`
B:-`Delta_(1)=Delta_(2)`
C:-`Delta_(1)=-Delta_(2)`
D:-`2Delta_(1)=Delta_(2)`
Correct Answer:- Option-B
Question19:-The coefficient of `p^(2)q^(3)` in the expansion of `(2p-3q)^(5)` is
A:–1080
B:-720
C:–720
D:-1080
Correct Answer:- Option-A
Question20:-sin 390 tan 30 + sin 120 is
A:-`(1)/(2)`
B:-`sqrt(3)/(2)`
C:-`(2)/sqrt(3)`
D:-1
Correct Answer:- Option-C
Question21:-The equation of a straight line making an angle 135° with positive direction of x-axis and cutting an intercept 5
on y axis is
A:-y=x+5
B:-y=5x+1
C:-y=5-x
D:-y=5x-1
Correct Answer:- Option-C
Question22:-`lim_(x->oo)(1+x)^(1/x)` is
A:-`oo`
B:-e
C:-1
D:-`(1)/(e)`
Correct Answer:- Option-B
Question23:-The sum of two numbers is 2. Find the smallest value possible for the sum of the square of one number and the
cube of the other
A:-1.9354
B:-6
C:–2.9
D:-5.3583
Correct Answer:- Option-A
Question24:-`int (dx)/((4+x^(2))^(3/2) ` is
A:-`(3)/(2)(4+x^2)^(1/2) + c`
B:-`(4)/sqrt(4+x^2)+ c`
C:-`(x)/(4sqrt(4+x^(2)))` +c
D:-`(x)/(2)+c`
Correct Answer:- Option-C
Question25:-The solution of `dy/dx=(y)/(x(x+1))`
A:-y (x+1)=c
B:-xy=c(1+x)
C:-x(x+y)=cy
D:-y(x+1)=cx
Correct Answer:- Option-D
Question26:-If A is a matrix then A(adj A) is
A:-lAl
B:-`A^(-1)`
C:-lAl I
D:-I
Correct Answer:- Option-C
Question27:-Inverse of the matrix A = `[[cos prop,-sin prop],[sin prop,cos prop]] is`
A:-`[[cos prop, sin prop],[-sin prop, cos prop]]`
B:-`[[-cos prop,-sin prop],[sin prop,-cos prop]]`
C:-`[[cos prop,-sin prop],[-sin prop,-cos prop]]`
D:-`[[-cos prop,sin prop],[sin prop,cos prop]] `
Correct Answer:- Option-A
Question28:-The value of x satisfying the following system is 2x-y+33=8; -x+2y+3=4; 3x+y-43=0
A:–2
B:-2
C:-4
D:-0
Correct Answer:- Option-B
Question29:-Co-efficient of `x^(2)` in the series expansion of `sqrt(4+x)`
A:-64
B:-`(-1)/(64)`
C:-512
D:-`(1)/(64)`
Correct Answer:- Option-D
Question30:-cos t + tan t sin t is
A:-cos t
B:–sec t
C:-cosec t
D:-sec t
Correct Answer:- Option-D
Question31:-The angle between the lines y=`sqrt(3)x+4 and y=(x)/sqrt(3)+2`
A:-90°
B:-60°
C:-30°
D:-0°
Correct Answer:- Option-C
Question32:-The points of discontinuity of f(x)= lxl – 1x-1l are
A:-x=0,1
B:-x=0
C:-x=1
D:-None of the above
Correct Answer:- Option-D
Question33:-The equation to tangent to the curve f(x)=(x+2) (2x+1)² at x = -1 is
A:-y=3x+2
B:-y=3-2x
C:-y=-3x-2
D:-y=2x+3
Correct Answer:- Option-C
Question34:-`int ln(x) dx` is
A:-ln(x) + c
B:-`(1)/(x)+ c`
C:-n ln(x) + c
D:-x ln(x) -x+c
Correct Answer:- Option-D
Question35:-Solution of (1+`x^(2))y^(1) = x(1-y) is`
A:-y=1+`(c)/sqrt(1+x^(2))`
B:-y=`sqrt(1+x^(2))+c`
C:-y=1+c`sqrt(1+x^(2))`
D:-y`sqrt(1+x^(2))=c`
Correct Answer:- Option-A
Question36:-What type of levelling is done if all the readings are taken with a single set up of Dumpy Level?
A:-Continuous Levelling
B:-Differential Levelling
C:-Compound Levelling
D:-Simple Levelling
Correct Answer:- Option-D
Question37:-Which among the following is called fine aggregate?
A:-Aggregates passing through 4.75mm lS sieve
B:-Aggregates retained on 4.75mm lS sieve
C:-Aggregates passing through 0.15mm lS sieve
D:-Aggregates retained on 0.15mm lS sieve
Correct Answer:- Option-A
Question38:-Which of the following is called a deep foundation?
A:-Raft foundation
B:-Combined footing
C:-Well foundation
D:-Trapezoidal footing
Correct Answer:- Option-C
Question39:-Which of the following is called as Beam section?
A:-Rolled steel angle sections
B:-TOR steel
C:-Rolled steel tubes
D:-Rolled steel I sections
Correct Answer:- Option-D
Question40:-Which instrument is used for setting right angles in a chain survey?
A:-Plumb bob
B:-Cross staff
C:-Peg
D:-Offset rod
Correct Answer:- Option-B
Question41:-Choose correct alternative from the followings:
A:-For cotton fiber, longer the fiber, finer it is
B:-For cotton fiber, longer the fiber, coarser it is
C:-For cotton fiber, longer the fiber, more non-uniformity it gets
D:-None of the above combinations
Correct Answer:- Option-A
Question42:-The hollow space in cotton is known as:
A:-Lumen
B:-Stomas
C:-Medulla
D:-Pores
Correct Answer:- Option-A
Question43:-With an increase of moisture content, the strength of a Nylon filament
A:-Increases
B:-Decreases
C:-First increases then decreases
D:-First decreases then increases
Correct Answer:- Option-B
Question44:-Which of the following fibers has excellent elastic recovery?
A:-Cotton
B:-Polyester
C:-Nylon
D:-Viscose
Correct Answer:- Option-C
Question45:-Which of the following fibres has excellent crease resistant?
A:-Cotton
B:-Polyster
C:-Nylon
D:-Viscose
Correct Answer:- Option-B
Question46:-Birefringence of a fibre is the measure of
A:-Dynamic modulus
B:-Density
C:-Orientation
D:-Crystallinity
Correct Answer:- Option-C
Question47:-The presence of functional groups in a fibre can be best determined by
A:-IR spectroscopy
B:-NMR spectroscopy
C:-Differential scanning calorimeter
D:-X-ray spectroscopy
Correct Answer:- Option-A
Question48:-Analysis of fiber structure by means of diffraction of electromagnetic waves is more compatible with x-rays
than with ordinary visible light because
A:-X-rays has higher energy than ordinary light
B:-X-rays has wave lengths smaller than ordinary light
C:-It is easy to get picture or photographs with x-rays
D:-Wave lengths are comparable with crystallite sizes of fibre
Correct Answer:- Option-D
Question49:-Electromagnetic waves used in NMR spectroscopy is
A:-Ultra-violet rays
B:-Radio waves
C:-Gamma rays
D:-Infra-red rays
Correct Answer:- Option-B
Question50:-The helix reversal is found in
A:-Jute
B:-Wool
C:-Silk
D:-Cotton
Correct Answer:- Option-D
Question51:-If initial modulus and moment of inertia of a fibre are denoted by E and I, respectively, the bending rigidity of
the fibre is expressed as
A:-E/I
B:-I/E
C:-EI²
D:-EI
Correct Answer:- Option-D
Question52:-Which one of the following statements is wrong?
A:-The density is same for both cotton and viscose
B:-The degree of polymerization is same for both cotton and viscose
C:-Both cotton and viscose are hydrophilic fibres
D:-Both cotton and viscose are the cellulosic fibres
Correct Answer:- Option-B
Question53:-Which one of the following statements is correct with respect to a textile fibre?
A:-It is transversely isotropic
B:-The primary bond strength is weaker than secondary bond.
C:-Essentially it is made of short chain molecules.
D:-It is having very high density.
Correct Answer:- Option-A
Question54:-Which one of the following statements is true?
A:-Glass is 100% crystalline fibre.
B:-Polypropylene is 100% amorphous fibre.
C:-Cotton is 50% crystalline fibre.
D:-Wool is 30% crystalline fibre.
Correct Answer:- Option-D
Question55:-Water acts as catalyst for the production of
A:-Nylon 6
B:-Acrylic
C:-Viscose
D:-Polyester
Correct Answer:- Option-A
Question56:-Which of the following fibre properties is not governed by its amorphous content?
A:-Dye uptake
B:-Moisture content
C:-Extensibility
D:-Friction
Correct Answer:- Option-D
Question57:-Which one of the following is the correct order in a DSC heating plot with increasing temperature?
A:-Glass transition, crystallization, melting
B:-Melting, glass transition, crystallization
C:-Crystallization, glass transition, melting
D:-Glass transition, melting, crystallization
Correct Answer:- Option-A
Question58:-Which one of the synthetic filament properties is not controlled by the drawing?
A:-Orientation
B:-Crystallinity
C:-Birefringence
D:-Molecular weight
Correct Answer:- Option-D
Question59:-Which one of the following materials has highest strength/weight ratio?
A:-Steel
B:-Nylon
C:-Kevlar
D:-Polyester
Correct Answer:- Option-C
Question60:-Ziegler-Natta catalyst is essential for the production of
A:-Kevlar
B:-Polypropylene
C:-Acrylic
D:-Cellulose triacetate
Correct Answer:- Option-B
Question61:-If d is the fibre diameter, air-flow rate through a plug of fibres is proportional to
A:-`sqrt(d)`
B:-d
C:-`d^(2)`
D:- `d^(3)`
Correct Answer:- Option-C
Question62:-For a square cut polyester staple fibre, length uniformity index is
A:-0.5
B:-0.5128
C:-0.5328
D:-1
Correct Answer:- Option-D
Question63:-INSTRON® tensile tester works on`INSTRON^(o.)`
A:-CRL principle
B:-CRE principle
C:-CRT principle
D:-CRS principle
Correct Answer:- Option-B
Question64:-As the time to beak increases
A:-Yarn strength decreases
B:-Yarn strength increase
C:-Yarn strength does not change
D:-Yarn strength first decreases and then increases
Correct Answer:- Option-A
Question65:-Most suitable test for parachute fabric is
A:-Tensile strip strength
B:-Bursting strength
C:-Tearing strength
D:-Tensile grab strength
Correct Answer:- Option-B
Question66:-Three verities of cotton fibres of 4.5, 5 and 4.0 micronaire values are blended in weight proportions of 30%,
20% and 50%, respectively. The average micronaire value of mixing is
A:-4.32
B:-4.35
C:-4.40
D:-4.34
Correct Answer:- Option-A
Question67:-If the front top roller of a ring frame having diameter of 1 inch becomes eccentric, at what wave length of
spectrogram do you expect a peak?
A:-8 cm
B:-2.54 cm
C:-4 cm
D:-1.27 cm
Correct Answer:- Option-A
Question68:-8 slivers each with a CVm of 2.8% are fed to a draw frame. If the draw frame adds a CVm of 1%, what will be
the CVm of ouput sliver?
A:-3.8%
B:-1.1%
C:-1.41%
D:-1.8%
Correct Answer:- Option-C
Question69:-Low strength mechanical properties are strongly correlated with
A:-Fabric thermal comfort
B:-Fabric drape
C:-Fabric dimensional stability
D:-Fabric handle
Correct Answer:- Option-D
Question70:-Which one of the following parameters has no influence on air permeability?
A:-Fabric cover factor
B:-Yarn twist density
C:-Fabric stiffness
D:-Fabric porosity
Correct Answer:- Option-C
Question71:-What is the GSM (g/m²) of a square jammed plain cloth made from 20 tex cotton yarns of 0.17 mm diameter?
A:-154
B:-164
C:-264
D:-364
Correct Answer:- Option-B
Question72:-Which one of the following statements is false?
A:-Equally strong but more extensible yarn will lead to higher grab strength.
B:-The grab strength of a fabric is higher than its strip strength.
C:-Tear resistance of a fabric is only a fraction of its tensile resistance.
D:-The grab strength of a fabric reduces as the fabric width increases.
Correct Answer:- Option-D
Question73:-If same yarn is used for both wrap and weft, maximum fabric thickness is
A:-Three times of yarn diameter
B:-Two times of yarn diameter
C:-Four times of yarn diameter
D:-Yarn diameter
Correct Answer:- Option-A
Question74:-Thermal resistance values of fabrics in an assembly are
A:-Multiplicative
B:-Substractive
C:-Additive
D:-Average
Correct Answer:- Option-C
Question75:-Shear stress vs. shear strain curve of a fabric shows
A:-Linearity with hysteresis
B:-Nonlinearity with hysteresis
C:-Linearity without hysteresis
D:-Nonlinearity with hysteresis
Correct Answer:- Option-B
Question76:-Self-twist spinning is most suitable for
A:-Cotton
B:-Jute
C:-Flax
D:-Wool
Correct Answer:- Option-D
Question77:-For same count, rotor yarn TM is
A:-2 times greater than that of ring yarn.
B:-10-15 % greater than ring yarn.
C:-Same as ring yarn.
D:-10-15% lower than ring yarn.
Correct Answer:- Option-B
Question78:-In case of Mélange yarn production, with the increase of shade depth
A:-Yarn quality deteriorates
B:-Yarn quality remains same
C:-Yarn quality improves
D:-Yarn quality firstly improves and then deteriorates
Correct Answer:- Option-A
Question79:-In case of air-vortex spinning
A:-All fibres start from the centre of the yarn and run outside.
B:-All fibres start from the surface of the yarn and run inside.
C:-Core fibres are parallel and the sheath fibres are wrapped over the core fibres
D:-Core fibres have a twist direction which is different from the sheath fibres
Correct Answer:- Option-A
Question80:-In comparison with the ring spun yarn, air-jet spun yarn is
A:-Weaker, stiffer and harder
B:-Stronger, softer and smoother
C:-Weaker, bulkier and harsher
D:-Stronger, hairier and evener
Correct Answer:- Option-A
Question81:-Feed per nip of comber is around
A:-2 mm
B:-6 mm
C:-12 mm
D:-18 mm
Correct Answer:- Option-B
Question82:-Self-cleaning action in a comber
A:-Increases with batt weight
B:-Decreases with batt weight
C:-Does not change with batt weight
D:-Decrease with fibre disorientation
Correct Answer:- Option-A
Question83:-Quality of combing is better in
A:-Forward feed
B:-Backward feed
C:-Mixed feed
D:-Differential feed
Correct Answer:- Option-B
Question84:-Which machine in the spinning line is termed as necessary evil for producing ring spun yarn?
A:-Card
B:-Comber
C:-Ring frame
D:-Speed frame
Correct Answer:- Option-D
Question85:-Pressure bar in draw frame is used to
A:-Apply pressure to the front top roller.
B:-Apply pressure to the middle top roller.
C:-Control the long fibre movement.
D:-Control the short fibre movement.
Correct Answer:- Option-D
Question86:-Yarn tension during winding is proportional to the
A:-`(Yarn tex)^(2)`
B:-`sqrt(Yarn tex)`
C:-Yarn tex
D:-` (1)/(Yarn tex)`
Correct Answer:- Option-C
Question87:-A 3.5 crossing drum means there are
A:-1.75 turns in a double traverse
B:-3.5 turns in a double traverse
C:-7 turns in a double traverse
D:-10.5 turns in a double traverse
Correct Answer:- Option-C
Question88:-A loom is weaving the design of 1 up 2 down twill. If the loom is running at 240 rpm, the speed of tappet shaft
will be
A:-60 rpm
B:-120 rpm
C:-80 rpm
D:-240 rpm
Correct Answer:- Option-C
Question89:-A Jacquard design is repeating on 20 cm along length and 12 cm along width. If the fabric has 30 ends and 24
picks per cm, the Jacquard capacity is
A:-240
B:-580
C:-360
D:-480
Correct Answer:- Option-C
Question90:-A loom of 500 cm width is running at 800 picks/min. The weft insertion rate of the loom is
A:-800 m/min
B:-4000 m/min
C:-500 m/min
D:-5000 m/min
Correct Answer:- Option-B
Question91:-On a Sulzer® projectile loom, the number of projectiles depends on
A:-Projectile mass
B:-Torsion-bar arrangement
C:-Loom width
D:-Projectile length
Correct Answer:- Option-C
Question92:-Which one of the following phenomena cannot be described by Poisson distribution
A:-Number of warp breakage on a loom
B:-Number of fabric defects / square meter
C:-Number of fibres in the yarn cross-section
D:-Strength of the warp yarn
Correct Answer:- Option-D
Question93:-If 1 Km of yarn produces 900 m fabric, the yarn crimp in the fabric is
A:-10%
B:-9%
C:-11.1%
D:-10.9%
Correct Answer:- Option-C
Question94:-Indigo is a
A:-Vat dye
B:-Cationic dye
C:-Acid dye
D:-Disperse dye
Correct Answer:- Option-A
Question95:-Dyeing of acrylic is carried out by using
A:-Vat dye
B:-Cationic dye
C:-Acid dye
D:-Disperse dye
Correct Answer:- Option-B
Question96:-Acid dyes are held on fabric by means of
A:-Covalent bond
B:-Vander wall force
C:-Electrostatic force
D:-Electromagnetic force
Correct Answer:- Option-C
Question97:-Sublimation transfer printing is most suitable for
A:-Cotton
B:-Polyster
C:-Silk
D:-Acrylic
Correct Answer:- Option-B
Question98:-For printing with reactive dye, most suitable thickener is
A:-Sodium chloride
B:-Sodium hypochlorite
C:-Sodium chlorite
D:-Sodium alginate
Correct Answer:- Option-D
Question99:-Mercerization of a cotton fabric is carried out by
A:-Sodium chloride
B:-Sodium hypochlorite
C:-Sodium hydroxide
D:-Sodium chlorite
Correct Answer:- Option-C
Question100:-For a satin weave (warp face)
A:-Picks/cm is greater than ends/cm.
B:-Ends/cm is greater than picks/cm.
C:-Ends/cm is equal to picks/cm.
D:-Ends/cm is just less than picks/cm.
Correct Answer:- Option-B