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WorksheetsBM DAY 03
Total questions: 30
Worksheet time: 10mins
Name
Class
Date
1.
Glass used to make articles which have to withstand high temperature such as combustion tube
a)
Soft glass
b)
Bohemian glass
c)
Flint glass
d)
Commom glass
2.
Technique of fabication used for making perforated glass plate
a)
Blowing
b)
Casting
c)
Rolling
d)
Spinning
3.
Common silicates glass is opaque to
a)
UV rays
b)
Infrared rays
c)
Both a and b
d)
None of these
4.
Glass used in wind screen of vehicle
a)
Sheet glass
b)
Plate glass
c)
Laminated glass
d)
None of these
5.
A glass which floats in water and can be cut like wood is
a)
Foam glass
b)
Float glass
c)
Common glass
d)
Safety glass
6.
Glass used in the manufacturing of artificial prism
a)
Soft glass
b)
Bohemian glass
c)
Common glass
d)
Potash lead glass
7.
Bullet proof glass is made of thick glass sheet sandwitched bya layer of
a)
Steel
b)
Stainless steel
c)
High test plastic
d)
Chromium plate
8.
Glass used as substitute for cork in AC and refrigerator
a)
Foam glass
b)
Float glass
c)
Wired glass
d)
Fibre glass
9.
Which one of the alloy of Nickel
a)
Aldural
b)
German silver
c)
Y alloy
d)
Gunmetal
10.
Copper + Zinc
a)
Bronze
b)
Y metal
c)
Brass
d)
Gunmetal
11.
Alloy of brass which resist corrossion
a)
Admirality metal
b)
Naval metal
c)
Red brass
d)
Dlta brass
12.
1% tin in yellow metal
a)
Admirality metal
b)
Catridge metal
c)
Naval metal
d)
Red brass
13.
Standard brass is
a)
Yellow metal
b)
Red brass
c)
Yellow brass
d)
None of these
14.
Alloy of magnesium is
a)
Gunmetal
b)
German silver
c)
Electron metal
d)
Monel metal
15.
Pig iron is a product of
a)
Bessemer converter
b)
Cupola
c)
Open hearth furnace
d)
Blast furnace
16.
Carbon % in cast iron is
a)
4 to 8
b)
>6%
c)
2 to 4
d)
1.5 to 3
17.
Lime obtained by calcination of comparitavely pure lime stone
a)
Caustic lime
b)
Quick lime
c)
Both a and b
d)
None of these
18.
A thin pourable suspension of slaked lime in water
a)
slaked lime
b)
milk of lime
c)
Both a and b
d)
None of these
19.
Fat lime is also known as
a)
Hydraulic lime
b)
High calcium lime
c)
Poor lime
d)
None of these
20.
Galvanising means covering iron with a thin coat of
a)
Aluminium
b)
zinc
c)
brass
d)
impurities
21.
Dow metal is an alloy of
a)
zinc
b)
copper
c)
Magnesium
d)
None of these
22.
Ores of cobalt
a)
arsenide
b)
sulphoarsenide
c)
malachite
d)
both a and b
23.
yellow mettal is
a)
60% Cu and 40% Zn
b)
1% tin with muntz metal
c)
muntz metal
d)
None of these
24.
Which among the following is a ferrous alloy
a)
Brass
b)
Bronze
c)
Invar
d)
Duralumin
25.
Deffect in wrought iron due to the presence of excess phosphorus
a)
Red shot
b)
Cold shot
c)
Holes
d)
None of these
26.
Percentage of clay in feebly hydraulic lime
a)
0-5%
b)
5-10%
c)
11-20%
d)
21-30%
27.
% of aluminium in duralumin
a)
0.99
b)
0.5
c)
0.2
d)
0.94
28.
Cast iron is manufactured in
a)
Blast furnace
b)
Bessemer converter
c)
Cupola furnace
d)
Muffle furnace
29.
Iron ore known as brown hematite
a)
Hematite
b)
Limonite
c)
Magnetite
d)
None of these
30.
The process of melting to separate the metal from the ore is known as
a)
Calcination
b)
Roasting
c)
Dressing
d)
Smelting
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