at 1173E; at equilibrium, what will be the number of moles of CO gas required to reduce one mole of 
at 1173 K?
1.0
1.3
2.3
3.3
Correct Answer :
D. 3.3
Related Questions
A solid aluminium ball, when quenched in a water bath maintained at 40°C, cools down from 550°C to 450°C in 20 seconds. The expected temperature of the ball after next 20 seconds may be about __________ °C.
370
340
320
300
Brittleness induced due to the presence of sulphur in steel can be reduced by adding
Manganese
Magnesium
Vanadium
Copper
Normalising of an object does not
Refine coarse grain structure obtained during hot working
Improve ductility
Improve yield strength
Improve mechanical properties
Which of the following is the correct nature of shear stress distribution along the cross section in a horizontal circular pipe under steady state fluid flow condition?
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
Which one can be directly solidified from gaseous state without entering into liquid state?
Helium
Oxygen
Carbon dioxide
None of these
Two wires of the same radius & material having length in the ratio of 1 : 2 are stretched by the same force. The strain produced in the two wires will be in the ratio of
1 : 1
1 : 2
2 : 1
1 : 4
Water flow in the river during flood can be categorised as the __________ flow.
Unsteady uniform
Unsteady non-uniform
Steady uniform
Steady non-uniform
The usual energy consumption in electric arc furnace steel making is __________ KWh/ton of steel.
60 - 100
400 - 700
1200 -1500
2000 - 2300
The difference in one unit of Rockwell hardness number corresponds to a difference in the depth of indentation of __________ mm.
0.001
0.01
0.002
0.02
The two elements required to form substitutional solid solution should not have
Same crystalline structure
Same valency
Widely differing electronegativity
Same atomic sizes
The product (s) of roasting of a sulphide ore is (are)
Oxide only
Sulphate only
Oxide and sulphate
Dependent on temperature and partial pressure of oxygen & sulphur dioxide
Chromium molybdenum steel cannot be welded using __________ welding.
Thermit
Electrical resistance
Oxy-acetylene
Any of these
Out of the following, the most malleable material is
Copper
Aluminium
Wrought iron
Lead
Specific gravity of a metal, which weighs 5 kg in air and 4 kg when submerged in water, will be
5
1.25
2.5
3.75
Out of the following, maximum temperature drop for a given heat flow & for the same thickness will be in the case of
Steel
Glass wood
Copper
Fireclay bricks
Quartz is a __________ material.
Diamagnetic
Ferromagnetic
Ferroelectric
Piezoelectric
Pick out the correct statement
Jet engine can work, where there is no atmosphere
Rocket engines cannot work, where there is no atmosphere
Rocket engines carry oxygen required for the combustion in the form of oxidiser
Jet engines also carry oxidiser
Between 230 and 370°C, blue brittleness is caused in mild steel because of the
Immobility of dislocation
Strain-ageing
Increase in Young's modulus
Strain hardening
In electrical resistance welding, distortion results from the use of improper
Clamping methods
Electrodes
Current
Filler material
Multistage compression of air as compared to single stage compression offers the advantage of
Power saving per unit weight of air delivered
Moisture elimination in the inter-stage cooler
Increased volumetric efficiency
All (A), (B) & (C)
As per international norms, the maximum permissible value of noise level in the industrial environment is __________ decibels as measured at a distance of 1.5 metres from the source of noise.
110
85
60
45
The best lubricants for a machine working at high temperature & load is
Grease
Solid lubricant
Animal oils
Mineral oils
Silicon in steel
Makes it usable in almost all magnetic circuits where alternating current is used
Increases its electrical resistivity and decreases the hysteresis loss
Is present upto 5% & 4% respectively when used in transformers & motor armatures
All 'a', 'b' & 'c'
Cascade control is
The continuous adjustment of the set point index of an automatic control loop by a primary (master) controller
Used when changes in process conditions cause serious upsets in the controlled variable
Useful to control flow from temperature
All 'a', 'b' & 'c'
Which of the following is not a charge material for cupola?
Limestone
Iron scrap
Iron ore
Pig iron
Non-ferrous alloys used for making cutting tools need not have high
Abrasion resistance
Toughness
Red hardness
Cutting speed
Increase in the entropy of a system represents the
Degradation of energy
Decrease in system pressure
Increase in the availability of energy
Increase in the temperature
What happens, when SO2 is passed through a solution of H2S in water?
Precipitation of sulphur takes place
H2SO3 is formed
Oleum is formed
None of these
__________ is the process of coating the surface of steel with aluminium oxide, thereby imparting it increased resistance to corrosion & oxidation upto a temperature of 700°C.
Veneering
Galvanising
Electroplating
Calorising