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For the following questions answer them individually
Self-ignition temperature of diesel a compared to petrol
is higher
is lower
is same
varies considerably
The binding material used in cemented carbide tools is
Nickel
Cobalt
Chromium
Carbon
The water hammer pressure in a pipe can be reduced by
using pipe of greater diameter
using a more elastic pipe
using pipe of greater wall thickness
increasingthevelocity of pressure wave
When a fluid is in motion, the pressure at a point is same in all directions. Then thefluid is
Real fluid
Newtonian fluid
Ideal fluid
Non-Newtonian fluid
Density of water is maximum at
$$0^\circ C$$
$$4 K$$
$$4^\circ C$$
$$100^\circ C$$
The ability of a tool materialto resist shock or impact forces is known as
wear resistance
toughness
red hardness
machinability
The tool material which has high heat and wear resistance is
Ceramics
Cemented carbide
Carbon steels
Medium alloy steel
To improve the surface finish of castings, the following additive is used in the moulding sand :
Resins
Oils
Wood flour
Sea coal
Cereals are added to the moulding sand to improve the following:
Porosity
Green strength
Hot strength
Edge hardness
Plastic toys are usually produced by using
shell moulding
green sand moulding
plaster moulding
injection moulding
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