Related Questions
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4
Addition of __________ to steel does not help in improving its machinability.
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4
Internal energy of a gas obeying Van-Der- Waals equation of state, [p + (a/v2)] (V - b) = RT, depends upon its
A. Pressure & temperature
B. Pressure & specific volume
C. Temperature & specific volume
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4
Holes for riveting purposes should be preferably made by
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4
Alcohols are not suitable as diesel engine fuel because the cetane number of alcohols is
A. Very low which prevents their ignition by compression
B. Very high which prevents their ignition by compression
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4
A dummy activity is used in PERT network to describe the
A. Precedence relationship
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4
According to maximum shear stress failure criterion, yielding in material occurs, when the maximum shear stress is equal to __________ times the yield stress.
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4
Enzymes belong to the category of
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4
The elastic strain energy of a unit length of an edge dislocation as compared to that of a screw dislocation is
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4
'Dikes' are low height walls made around the storage vessels meant for storing hazardous & inflammable material (e.g., petroleum products). Volume of dikes is equal to (where, V = volume of the storage vessel)
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4
With increasing carbon percent in steel beyond 0.8%, its ultimate tensile strength (UTS) and __________ is not affected.
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4
Lead is poured into the joint between two __________ pipes.
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4
Specific gravity of a metal, which weighs 5 kg in air and 4 kg when submerged in water, will be
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4
Production of a hollow product by inflation of a tube or parison is called the __________ process.
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4
Pick out the wrong statement.
A. For a pressure vessel to be classified as 'thin vessel', the ratio of wall thickness to mean radius is less than 0.1
B. For calculating forces and efficiency of riveted joint, either rivet diameter or rivet hole diameter is used in case of pressure vessel and in structural work
C. Longitudinal joint is normally made butt joint to maintain the circularity of the vessel
D. Maximum diameter of the opening provided in a pressure vessel, which does not require any compensation is 200 mm
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4
A fire tube boiler is limited to a maximum steam pressure of about __________ kg/cm2.
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4
At absolute zero temperature, for any reaction involving condensed phases
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4
Large diameter reinforced cement concrete (RCC) pipes are generally joined by __________ joint.
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4
Tip of the match stick contains a mixture of
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4
Upto the critical radius of insulation, added insulation, will
A. Increase the heat loss
B. Decrease heat loss and will have no effect beyond that
D. Reduce convection heat loss compared to conduction heat less
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4
Cold working of a material results in increase in hardness, which is termed as the __________ hardening.
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4
Out of the following, the best material capable of withstanding shock & vibration without the danger of cracking is
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4
Hot & cold working of material causes its __________ deformation.
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Brass parts with high residual tensile stress at the surface are susceptible to season cracking (i.e. spontaneous cracking occuring on exposure to atmospheric corrosion), if its zinc percentage is more than
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4
Coarse grained steels have
B. No tendency to distort
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4
Batch process is preferred over continuous process, when the
A. Product yields and quality cannot be achieved in continuous process, because of long residence time
B. Sales demand of product is not steady
C. Same equipment cannot be used for several processes of the same nature
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4
The heat treatment to which the steel wire containing > 0.25% carbon is subjected to is
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4
A dense structure of grinding wheel is not used for the
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4
Which of the following is an acidic constituent of B.F. slag?
A.
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4
__________ joint is usually used for joining cast iron pipes mostly used for temporary pipelines, where it may be necessary to dismantle & reassemble the pipeline very frequently.
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Which of the following is an unconventional source of energy?