Pulp & Paper Mcqs

Q:

What are some high level non-process elements which interfere in the recovery process?

A) Carbon Dioxide and Oxygen B) Lead and Other Impurities
C) Silica and Calcium D) Silicate and Copper
 
Answer & Explanation Answer: C) Silica and Calcium

Explanation: These are the impurities which gets added while the extraction.

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679
Q:

Where is Sapwood located in the structure of softwood stem?

A) Below Inner Bark B) Below Outer Bark
C) Below Wood Ray Heartwood D) Above Pith
 
Answer & Explanation Answer: A) Below Inner Bark

Explanation: It contains the living cells, so it is situated near the outer part.

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584
Q:

An _________ is a sol with the continuous phase a gas. Fog is an _________ of water droplets.

A) Aerosol B) Emulsion
C) Agglomerate D) Electrophoresis
 
Answer & Explanation Answer: A) Aerosol

Explanation: It’s a colloid of fine solid particles or liquid droplets, in air or another gas. These could be natural or artificial. Fog is an aerosol of water droplets; smoke is an aerosol of solid particles.

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342
Q:

_________ with energy dispersive x-ray analysis (E.D.A.X.) is a very useful tool for qualitative and semi-quantitative analysis of elements.

A) Scattering electron microscopy B) Scattering ion microscopy
C) Scanning electron microscopy D) Scanning ion microscopy
 
Answer & Explanation Answer: C) Scanning electron microscopy

Explanation: Scanning electron microscopy (S.E.M.) with energy dispersive x-ray analysis (E.D.A.X.) is a very important tool for qualitative and semi-quantitative analysis of elements with atomic no. of 13 or higher aluminium on the surface of paper.

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275
Q:

The hydrophilic moiety may be anionic, cationic, ampholytic, or non-ionic not depending on the type of charge(s) carried, if any.

A) True B) False
 
Answer & Explanation Answer: B) False

Explanation: The hydrophilic moiety may be anionic (carboxylate, sulfate, or phosphate), cationic ,ampholytic, or nonionic (Span®, Tween®, Triton®) depending on the type of charge(s) carried, if any.

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262
Q:

Screen printing utilizes a ___________ to control the location of the ink.

A) Layer B) Mask
C) Point D) Spot
 
Answer & Explanation Answer: B) Mask

Explanation: Screen printing is a printing method that utilizes a plate (screen mask) that utilizes a screen mesh, which is woven with synthetic fibers or metal fibers. It is a type of stencil printing, which prints on objects by passing ink through the mesh of a screen mask.

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230
Q:

What is the specific gravity of the bark in usual cases?

A) 0.90 – 1.45 B) 0.40 – 0.65
C) 0.45 – 0.90 D) 1.24 – 2.00
 
Answer & Explanation Answer: B) 0.40 – 0.65

Explanation: This is of mature bark. This value of ‘g’ is used in calculations.

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224
Q:

_________ is the movement of charged surfaces with corresponding ions and H2O in the stationary liquid induced by an external field.

A) Colloidal suspension B) Emulsion
C) Sedimentation potential D) Electrophoresis
 
Answer & Explanation Answer: D) Electrophoresis

Explanation: It’s a technique utilized in laboratories in order to separate macro molecules based on size. The technique applies a (–ve) charge so proteins move towards a (+ve).

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