Cast iron contains __________ percent carbon.
2.5
3.75
4.75
5.25
Correct Answer :
A. 2.5
Related Questions
The following type of bonding is strongly directional in solids.
Vander Waal's
Ionic
Metallic
Covalent
Mho's scale of hardness, which consists of 10 standard minerals is used for the measurement of __________ hardness.
Scratch
Indentation
Dynamic
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A thin, flat & square plate measuring 2 m × 2 m is freely hanging in ambient air at 25°C. It is exposed to the solar radiation falling on one side of the plate at the rate of 500 W/m2. The plate temperature will remain constant at 30°C, if the convective heat transfer co-efficient is __________ W/m2 °C.
50
100
150
200
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Film
Nucleate
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The best guide to judge the general quality of water is the measurement of its
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The main constituent of bones is
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CaCO3
CaCl2
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CANDU type nuclear reactor using natural uranium as fuel is the extensively used nuclear reactor because of the fact that the
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Volume of blast furnace slag is about __________ times the volume of hot metal (pig iron) of the same weight
1.5
3
5
7
Alcohols are not suitable as diesel engine fuel because the cetane number of alcohols is
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Very high which prevents their ignition by compression
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Decreases
Remain constant
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Common salt is produced from sea water in India generally by the __________ method.
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Solar evaporation
Electrolytic
None of these
While the bin cards are used in the effective stores management, the queuing theory is associated with the __________ time.
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Idle
Inspection
Tool replacement
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Brake linings
Bearings
Carbide tool tips
All 'a', 'b' and 'c'
The friction factor for the turbulent fluid flow in a rough pipe does not depend upon the
Pipe roughness & pipe diameter
Fluid velocity
Type of flowing fluid
Both 'b' & 'c'
Titanium is added to molten aluminium alloys before casting for the purpose of
Grain refinement
Increasing corrosion resistance
Reducing porosity
Improving fluidity
There are one octahedral void and __________ tetrahedral void in the closest packing of atoms.
One
Two
Three
None of these
Window panes of aeroplanes are normally made of
Perspex (PMMA)
Teflon (PTFE)
Bakelite (phenol formaldehyde)
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A psychrometer does not measure the __________ temperature of moist air.
Dew point
Dry bulb
Wet bulb
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Sensible heat is added
Sensible heat is removed and the latent heat is added
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80-120
200-300
600-800
1000-1100
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Head developed
Overall efficiency
Weight
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100% indirect reduction
100% direct reduction
50-60% indirect reduction
30-40% indirect reduction
Wrought iron does not have
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Ability to hold protective coating
High ductility & corrosion resistance
Easily weldable characteristics
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Different for different metals
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Less for high melting point metals
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High carbon steel
Forged steel
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Reducing and basic slag
High activity co-efficient of phosphorous in metal
Oxidising and neutral slag
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Painted steel
Galvanised iron
Case hardened steel
Lead lined reactor