A cylindrical rod subjected to a tensile strain within the elastic limit undergoes a volume change. If the volume strain is equal to half the tensile strain, then the Poisson's ratio of the rod is
0
0.33
0.44
0.25
Correct Answer :
C. 0.44
Related Questions
For dynamic strain measurement, the Wheatstone bridge used is of __________ type.
Voltage sensitive null
Voltage sensitive deflected
Current sensitive deflected
None of these
Out of the following the refractive index is the highest for
Glass
Diamond
Brine
Kerosene
Maraging steels derive their strength from the following mechanism:
A fine, highly dislocated and strong martensite
Fine dispersions of inter-metallic of Fe, Ni, Ti etc
Fine dispersions of alloy carbides in a ferrite matrix
Fine dispersions of 
C nucleated on dislocations in austenite
Powder metallurgy is used to produce
High precision components with complex cavities and sharp features
Components of large size
Porosity free components
Components of such alloys whose constituents do not form alloys readily
Temperature of hot gases flowing in a pipe is measured by a thermocouple inserted in the thermal well. The thermal well made of __________ will facilitate the most accurate measurement of the temperature.
Copper
Steel
Aluminium
Brass
In inventory control theory, the economic order quantity (EOQ) is the
Lot size corresponding to break even analysis
Average level of inventory
Optimum lot size
None of these
Which of the following are considered applications of ultrasonic testing?
Determination of elastic constant
Detection of defects in metal
Measurement of material thickness
None of the above
For which pair of the fuel gases, calorific value (C.V.) of one fuel is almost double that of the other on volume basis (i.e., kcal/Nm3) while the C.V. is same on weight basis (i.e., kcal/kg)?
Propane and acetylene
Propane and LPG
Sewage gas and gobar gas
B.F gas and coke oven gas
The specific gravity of coal depends mainly on its __________ content.
Carbon
Volatile matter
Ash
Moisture
Which of the following materials has the poorest electrical conductivity?
Carbon
Aluminium
Silver
Stainless steel
Fibre reinforced plastic (FRP) are
Made of glass fibre and thermoplastic resins
Anisotropic
Made of thermosetting resin and glass fibre
Both 'b' & 'c'
On oscilloscope screen for dynamic measurement, lissajous diagram is normally used to determine the __________ of the input signal.
Frequency
Amplitude
Damping
None of these
The behaviour of a metal specimen, which when plastically strained in tension reduces its yield stress in compression and vice versa; is termed as the
Work hardening
Bauschinger effect
Creeping effect
Stress recovery effect
Which of the following is not a principal alloying element for the structural steel?
Molybdenum
Nickel
Manganese
Chromium
The surface tension of a liquid, at critical temperature is
Indeterminate
Zero
Infinity
Same as that at any other temperature
Globular form of cementite is formed during the __________ process.
Spheroidising
Hardening
Annealing
Normalising
Reynolds number of a fluid flowing in a circular pipe is 10,000. What will be the Reynolds number when the fluid velocity is decreased by 30% & the pipe diameter is increased by 30%?
9,100
13,000
7,000
2,550
Which of the following is an ore dressing operation?
Classification
Smelting
Roasting
None of these
Which of the following has the least value of ultimate tensile strength (UTS)?
Medium carbon steel
High carbon steel
Cast iron
Wrought iron
Reduction in the grain size reduces the __________ of the material.
Fatigue resistance
Tensile strength
Creep resistance
All (A), (B) & (C)
Pick out the wrong statement.
Ductile fracture of a stressed material, which exhibits a large plastic deformation is commonly caused by the formation and coalescence of voids in the necked region
Brittle fracture is caused by the propagation of pre-existing cracks in the material and involves minimum plastic deformation
Fatigue fracture of a material is always brittle in nature and takes place due to the existence of line imperfections
Brittle materials are generally tested in tension
__________ is not used as a material of construction in thermocouples.
Alumel
Rhodium
Constantan
Duralumin
The capacity of a spring to store energy is called the spring form co-efficient. Stiffness of a spring is measured by the
Ability to absorb shock
Capacity to store energy
Ratio of the wire & coil diameters
Load to produce unit deflection
The swift cup test evaluates the following property of a sheet metal.
Stretchability
Drawability
Bendability
None of these
Broaching tools are usually made of
Cermets
High speed steel
Tungsten carbide
Stellite
Which of the following metals cannot be hot worked at room temperature?
Zinc
Nickel
Lead
Tin
The minimum and the maximum number of members required to form a Private Limited Joint Stock Company are respectively
7 and 30
10 and 50
2 and 50
13 and 55
Hydrogen can be
Used in I.C. engines as fuel
Liquefied & stored under cryogenic conditions
Produced by electrolysis of water
All (A), (B) & (C)
Regeneration of molecular sieve requires it to be heated to a temperature of about __________ °C.
80-120
200-300
600-800
1000-1100
The ratio of mass of a neutron to that of an electron is about 1839. What is the ratio of the mass of a proton to that of an electron?
159
1837
2537
10000