Basic Viva For Textile Engineers (Fabric Related) Part-3

 

61. What is Lacra ?

Ans: polyurothin fibre, stetching fibre .

62. What is Gauge ?

Ans: Needles /inch .

63. What is Needle peace ?

Ans: Needle peace = 1 / NeedleGauge.

64. What are the basic element warp knitting ?

Ans: a) needle

b)sinker : i) loop formation ii) holding down iii) knock over

c)guide

65. What are the main features of single jersey plain fabric ?

Ans: i) technical face is smooth & v-shape is found & technical back is rough ii) produce by single set of needle iii) tendency of curling yarn .

66. What are the main features of rib structure ?

Ans: i) ) technical face & back is of same

ii) it is normally knitted 2 set of needles

iii) this types of fabric arenot curling tendency.

67. Define tappet fabric?

Ans: Fabrics of simple weave structure that may be woven or a cam or tappet loon .

68. Define CPI ?

Ans: Cpi means course per inch. It indicate the how many course are prese nt in one inch length of the fabric.

69. How many types of fabric?

Ans: Woven, Knitted, Non woven, Braid.

70. Define warp?

Ans: The sets of yarn which is used along the length of the fabric is termed as warp.

71. Define weft?

Ans: The sets of yarn which is used across the width of the fabric is termed as weft.

72. Write down the process sequence of dyed fabric production?

Ans: Yarn preparation, weaving, furnishing

73. What is the basic principle elements of Knitting?

Ans: Principle elements of Knitting- needle, sinker, cam, jack, yarn feeder

74. What is needle?

Ans: The hooked metal needle is the main principle knitting element of the Knitting m/c

75. Write down the function of needle?

Ans: The function of needle is – New yarn receiving, Loop forming, Carry the old loop, Clearing the old loop.

76. What is sinker?

Ans: It is the second primary knitting element. It is a thin metal plate with an individual or a collective action operating approximately at right angles from the hook side of the needle bed, between adjacent needles.

77. What is yarn feeder?

Ans: Yarn feeder mainly used for feed the yarn from package to Needle by yarn tensioner, yarn guide etc.

78. What is needle gauge?

Ans: No of Needles Per unit Length ( e.g. Needles/inch)

79. What is course?

Ans: Yarn inlaid horizontally with loop structure in a Knitting structure.

80. What is wale?

Ans: Yarn inlaid vertically with loop structure in a Knitting structure.

81. What is loop?

Ans: A piece of yarn used in knitted structure.

82. what is stitch?

Ans: Dimensionally stable structural unit of a knitted structure.

83. What is tuck loop?

Ans: When the needle receives new yarn but the old loop is not locked off in its regular course, it is known as Tuck loop.

Yarn Receiving + Not Clearing = Tuck loop.

84. What is miss loop?

Ans: When the needle neither receive new yarn nor allows the old loop to be inlaid without knitting is called miss loop.

Not Receiving + Not Clearing = Miss loop.

85. What is drop stitch?

Ans: When the needle clear the old loop without receiving new yarn.

86. What are the basic motions of a loom?

Ans: Basic motions of a loom, Primary motion., Secondary motion, Tertiary motion.

87. What is degree of interlacing?

Ans: When interlacing ratio is expressed as % is called degree of interlacing.

88. What is weave plan?

Ans: The interlacement of warp and weft yarn, is called weave plan.

89. What is drafting plan?

Ans: The process of drawing the warp yarn into the heald eye according to the weave plan or design is called drafting plan.

90. What is denting plan?

Ans: The process of inserting warp yarn through reed is called denting plan.