Which of the following materials has the maximum shrinkage allowance?
Brass
Cast iron
Lead
Aluminium alloy
Correct Answer :
C. Lead
Related Questions
The co-ordination number in simple cubic structure is
4
6
8
12
The rolling process cannot be used to produce
Plates
Rods
Tubes
Wires
Carbide tipped cutting tools are manufactured by powder metallurgy techniques and have a composition of
90% tungsten carbide and 10% cobalt
70% aluminium oxide & 30% silica
30% nickel, 15% chromium & 55% tungsten
65% tungsten & 35% zirconium
The kinematic viscosity (in stoke) and the absolute/dynamic viscosity (in poise) are the same for __________ at room temperature.
Air
Water
Mercury
Alcohol
CANDU type nuclear reactor using natural uranium as fuel is the extensively used nuclear reactor because of the fact that the
Specific fuel consumption is very low due to the use of heavy water
Fuel cost is much lower than that used in pressurised water or boiling water reactor
Heavy water is used both as coolant as well as moderator
Both 'b' & 'c'
A compact estimate about the amount of materials handling between various work stations is obtained from the
Gantt chart
Bin chart
String diagram
Travel chart
The leaching solvent used in Baeyer's process for the purification of bauxite is
Ammonium hydroxide
Sodium carbonate
Sodium hydroxide
Ammonium carbonate
The most commonly used moderator in nuclear power plants is
Graphite
Light water
Heavy water
Beryllium
Which of the following if present in iron ore, enhances its value?
Alumina
Alkali oxide
Lime & Magnesia
None of these
Starting friction is low in case of the __________ lubrication.
Boundary
Hydrodynamic
Hydrostatic
Mixed/semi-fluid
With increase in steam pressure, its specific volume decreases
Rapidly first and then slowly
Linearly
Slowly first and then rapidly
Exponentially
Drills are usually made of
Cermets
High speed steel
Alloy steel
Tungsten carbide
Thermal efficiency of an internal combustion engine is around __________ percent.
8
35
65
80
The life of a ball bearing is inversely proportional to
(Load)1
(Load)2
(Load)3
(Load)0.33
Thermit welding is categorised as the __________ welding.
Forge
Fusion
Resistance
Arc
Inertial forces are obtained, when the elastic forces are multiplied by __________ number.
Mach
Froude
Reynolds
Euler
For a first order chemical reaction, the concentration of the reactant decreases __________ with time.
Linearly
Exponentially
Logarithmically
Inversely
Closeness of packing is maximum in case of __________ crystal lattice.
Face centred
Simple cubic
Body centred
None of these
Calorific value of __________ are almost same.
Lignite & anthracite coal
Lignite & coal gas
Petrol & diesel
Coal gas & natural gas
Breakeven point represents the condition, when the company runs under no profit no loss condition. In break even analysis, total cost comprises of fixed cost
Only
Plus variable cost
Plus overhead cost
Plus selling expenses
Solute atoms which cause yield point phenomenon in mild steel are/is
Aluminium
Boron
Carbon
Nitrogen
Eutectic reaction for iron-carbon system occurs at a temperature of __________ °C.
723
959
1147
1493
Ultimate strength in tension as compared to that in shear for steel is
Half
One third
One and half times
One fourth
Which of the following properties of a solid is not dependent on crystal imperfection?
Ductility
Semi-conductivity
Melting point
Yield stress
Damage to metal surface by mechanical action is called
Pitting
Corrosion
Erosion
None of these
Which of the following emissions in the exhaust gas of an I.C. engine causes the formation of photochemical smog?
Nitrogen oxides
Hydrocarbons
Both 'a' & 'b'
Carbon monoxide
Biological shield in a nuclear reactor is generally provided to protect against the
α-rays
β-rays
Gamma rays & neutrons
Electrons
In an amorphous material, atoms defy any definite atomic structure and exist in random pattern just like in liquid. Which of the following is an amorphous material?
Tin
Lead
Zinc
Glass
Cold heading or upsetting is categorised as the __________ process.
Extrusion
Bending
Rolling
Forging
Iron content in Indian iron ore is about __________ percent.
80-85
60-65
40-45
20-25