WorksheetsMATERIAL TECHNOLGY- FILL UPS
Total questions: 80
Worksheet time: 55mins
Name
Class
Date
1.
Electrons revolve around a positively charged nucleus in
discrete .
a)
orbits
b)
centre
2.
A bond is an interatomic bond.
a)
Primary
b)
Secondary
3.
The bond between molecules is bond.
a)
Secondary
b)
Primary
4.
The bond which is stronger and stable is .
a)
Primary
b)
Secondary
5.
The bond which is week and less stable is .
a)
Secondary
b)
Primary
6.
The week force is also known as force.
a)
Vander-waals
b)
Newton
7.
Covalent bond is also known as bond.
a)
Homopolar
b)
Amorphous
8.
The ionic solids are soluble in .
a)
Water
b)
Chemical
9.
Covalent solids are soluble in .
a)
Benzene/Toluene
b)
Butyene
10.
Atoms are arranged periodically in solid.
a)
Crystalline
b)
Amorphous
11.
Atoms are arranged in random in solid.
a)
Amorphous / Non-
crystalline
b)
Crystalline
12.
Non-Crystalline solid is also known as solid
a)
Amorphous
b)
Crystalline
13.
In BCC structure, BCC stands for .
a)
Body Centred Cubic
b)
Face centred cubic
14.
In FCC structure, FCC stands for .
a)
Body Centred Cubic
b)
Face centred cubic
15.
Total no. of atoms in BCC structure is .
a)
17
b)
9
16.
Total no. of atoms in FCC structure is .
a)
14
b)
14
17.
Total no. of atoms in HCP structure is .
a)
9
b)
17
18.
The combination of Vacancy and Interstitial defects is
.
a)
Dopler
b)
Frenkel
19.
Copper and Zinc are solid solutions of .
a)
Steel
b)
Brass
20.
Copper and Tin are solid solutions of .
a)
Copper
b)
Bronze
21.
Nickel and Copper are solid solutions of .
a)
Iron & carbon
b)
Monel metal
22.
Iron and Carbon are solid solutions of .
a)
Carbon
b)
Steel
23.
Brass is an example for type of solid solutions
a)
Non Interstitial
b)
Substitutional
24.
Steel is an example for type of solid solutions
a)
Non Interstitial
b)
Interstitial
25.
Solute are small compared to .
a)
Liquid
b)
Solvent
26.
Metal comprised of two or more elements, atleast one is
metallic is called as .
a)
Steel
b)
Alloy
27.
The metal begins when temperature of liquid metal
drops below a certain value.
a)
Liquified
b)
Solidify
28.
The melting point of Pure iron is .
a)
1450C
b)
1535ᵒC
29.
Iron Carbon diagram gives clear idea of
temperatures for any carbon steel.
a)
Tempering
b)
Quenching
30.
Less than 2% carbon is called .
a)
Iron & carbon
b)
Steel
31.
Less than 0,83% carbon is called steel.
a)
Hypo-eutectoid
b)
Hyper-Eutectoid
32.
More than 0.83% carbon is called steel.
a)
Hyper-Eutectoid
b)
Hypo-eutectoid
33.
Sequence of heating and cooling is called .
a)
Quenching
b)
Heat Treatment
34.
The pure iron containing only 0.08% carbon is .
a)
Martensite
b)
Ferrite
35.
Pearlite exists at ͦC temperature.
a)
1500c
b)
723 ͦ C
36.
The steel is hard and brittle when it is in micro
constituent.
a)
Bainite
b)
Martensite
37.
The micro-constituent is in the form of tiny
globules.
a)
Martensite
b)
Bainite
38.
Box annealing in a sealed container is to reduce
a)
reduction
b)
oxidation
39.
Pack carburizing is also called as carburizing.
a)
liquified
b)
Solidify
40.
Energizer used in pack carburizing is .
a)
Nacl3
b)
BaCo3 (Barium
carbonate)
41.
Immediately after hardening, should be done.
a)
Tempering
b)
Hardening
42.
The chamber carrying a refractory lining inside is called heat treatment .
a)
Furnace
b)
Cooler
43.
Acid pickling is a process of
a)
Removing oxides and Dirt
b)
Cooling
44.
Acid pickling produce
a)
High reflective surface for electroplating
b)
Corrosion
45.
Commonly acid used in acid cleaning Is
a)
Sulphuric acid
b)
Nitric acid
46.
Grit blasting Is used for
a)
Cleaning casting & Forging of sand
b)
Molding
47.
In Grit Blasting for Making Small Component
a)
Nozzle can be stationary & Job can travel
b)
Cleaning casting & Forging of sand
48.
Alkaline detergent cleaning is used for
a)
Removing Oil & Grease
b)
Chlorination
49.
Metallurgical microscope works on the principle of
a)
Reflection of light
b)
Difraction
50.
carries eye piece at its top
a)
Draw tube
b)
Channel
51.
Body tube is connected to the upper end of the limb with the help of
a)
Rack and Pinion
b)
Spur gear
52.
magnifies the image formed by objective lens
a)
Eye-piece
b)
Photo
53.
Small specimen is to be mounted on
a)
Bakelite
b)
Sterillite
54.
Steel is an alloy of
a)
Iron & carbon
b)
Alloy
55.
is the special purpose steel
a)
Stainless steel or Spring steel
b)
Alluminium
56.
Carbon content in tool steel is
a)
0.014
b)
0.14
57.
is well suited for manufacturing cutting tools which can operated at high speed
a)
HCS
b)
HSS
58.
Full form of HCHCr steel is
a)
HSS
b)
High carbon high chromium steel
59.
Low hardness & strength after hardening due to
a)
High cooling rate
b)
Slower cooling rate,Higher tempering temperature
60.
Low hardness & strength after hardening can be avoid by
a)
Decreasing cooling rate
b)
Increasing cooling rate
61.
Improper carburizing atmosphere leads to which defect in heat treatment
a)
High hardness
b)
Low hardness & strength
62.
Soft spot in heat treatment due to
a)
Formation of solid
b)
Formation of vapour
blankets b/w quench at and piece before
63.
Soft spots in H. T can be avoid by
a)
Formation of vapour
blankets b/w quench at and piece before
b)
Adopt spray-quenching practice
64.
Large piece non-uniformity in heating leads to which defects in H.T
a)
Hot spots
b)
Soft spots
65.
Oxidation & decarburisation defects in H.T due to
a)
Slow melting
b)
Overheating
66.
Oxidation & decarburization defects in H.T can be avoid by
a)
chemical
b)
Heat in molten salt,Ceramic coating may
be applied before heating
67.
Overheating leads to which defects
a)
Reduction
b)
Oxidation & decarburization
68.
Distortion & warping defects in H.T due to
a)
slow cooling
b)
Fast cooling
69.
Tumbling is an example of cleaning
a)
chemical
b)
Mechanical
70.
Belt sanding is an example of cleaning
a)
Chemical
b)
Mechanical
71.
Electropolishing is a basically reverse process of
a)
Chemical
b)
Electroplating
72.
Solvent cleaning is an example of cleaning
a)
Chemical
b)
Chemical
73.
The most commonly used acid in acid cleaning is
a)
Nitric acid
b)
Sulphuric acid
74.
Pickling opeation can be accelerated by
a)
Cooling the solution
b)
Heating the sollution
75.
is the most commonly used method for industrial finishes.
a)
Electroplating
b)
Spray painting
76.
Process of providing metalic coating by means of electrolysis is called
a)
Spray painting
b)
Electroplating
77.
is a vapour coating process
a)
Vaccum deposition
b)
Vaccum metalizing
78.
In a coating the material will deposited is connected to terminal.
a)
Negative
b)
Positive
79.
The pieces to be carborized are to be pached in
before loading it in the furnace
a)
Nitric acid
b)
quick lite/calcum carbide
80.
The threads are to be filled with clay while case hardening to of the threads.
a)
smoothening
b)
Protect the thread
100 %
