Impact
Cupping
Hardness
Tensile
A. Impact
Nodulising
Pelletising
Balling
Briquetting
Resilience
Toughness
Ductility
Impact strength
100
200
1000
2000
Materials exhibiting high elasticity obey Hooke's law
The elastic behaviour of rubber under compression is the same as its behaviour under tension
The damping capacity of a material is due to its plastic deformation
The stress required to cause plastic flow in polycrystalline material is higher as compared to monocrystalline materials due to the presence of grains of different orientations
Working
Bearing
Yield
None of these
Increases
Decreases
Remain same
May increase or decrease (depends on the suction pressure)
Casting
Pattern
Draft
Distortion
Styrofoam
Lucite
Perspex
Plexiglass
2
8
10
40
Fine grains
Coarse grains
Homogeneity
Dissolved elements (except cobalt)
Oxy-acetylene flame
Oxy-hydrogen flame
Arc welding
Inert gas arc welding
Haemoglobin
Chlorophyll
Hypo solution
None of these
Flow output
Head developed
Overall efficiency
Weight
Fatigue
Notched bar impact
Tensile
Hardness
Processing of thermosetting plastics is ideally done by injection moulding
Processing of thermoplastics is ideally done by compression moulding
Mass production of seamless pipes are done by electrical resistance welding (ERW)
Stretch forming is a process of cold drawing
Precipitation of sulphur takes place
H2SO3 is formed
Oleum is formed
None of these
1
4
18
23
Positively charged
Negatively charged
Neutral
Of higher wavelength than visible light
550-600
450-500
350-400
250-300
Nickel
Copper
Chromium
Silicon
Cold cracking of a weld is due to the presence of hydrogen gas in the weld
True stress is given by, σ = σE (1 + εE), where σE and εE are engineering stress and engineering strain respectively
Phosphorous can be easily recovered in the iron blast furnace
High residual stress at the surface is beneficial for fatigue properties of a material
0.09
0.3
0.57
0.94
Metal changes from liquid state to solid state at freezing temperature
Solid phase temperature drops from freezing temperature to the room temperature
Liquid metal temperature drops from pouring temperature to room temperature
Liquid metal temperature drops from pouring temperature to freezing temperature
110
85
60
45
Temperature is low
Atmospheric pressure is low
Atmospheric pressure is high
None of these
Brass
Cast iron
Lead
Aluminium alloy
Cryolite
Azurite
Chalcopyrite
Malachite
Nickel, cobalt & chromium
Tungsten, chromium & cobalt
Manganese, chromium & cobalt
Tungsten, molybdenum & nickel
Molecules with symmetrical arrangements (e.g. CH4 or CCl4) are non-polar
Generally, non-polar compounds are chemically inactive, conduct electricity poorly and do not ionise
Most of the hydrocarbons are non-polar
None of these
Abrasion resistance
Toughness
Red hardness
Cutting speed