Related Questions
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4
Liquor poisoning generally occurs due to the presence of __________ in it.
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Fatigue limit improvement by over stressing the metal by successively increasing the load is called coaxing. In fatigue failure, the material fails
C. Below the elastic limit
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4
According to thermodynamic Fahrenheit scale, the fundamental interval between ice point to steam point is
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4
Resilience of a bolt can be increased by increasing its
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Evaporative cooling process employs a combination of cooling and humidification in which the
A. Sensible heat is added
B. Sensible heat is removed and the latent heat is added
C. Latent heat is removed
D. Sensible heat is added and latent heat is removed
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4
Use of flux during soldering is done to
A. Increase fluidity of solder by lowering its melting temperature
B. Prevent oxide formation
C. Wash away surplus solder
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4
Lead is poured into the joint between two- __________ pipes.
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__________ has a negative co-efficient of linear expansion.
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__________ of grey cast iron produces white cast iron.
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Probability of cavitation occuring becomes very high, when the local __________ resulting in water bubbles formation, which on rupture cause cavitation
A. Pressure falls below the vapour pressure
B. Pressure becomes very high
C. Temperature becomes low
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4
Which of the following is an example of stress corrosion?
A. Season cracking of brass
B. Caustic embrittlement of steel
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Other parameters remaining same, the recrystallisation temperature of an alloy is lowered, when
A. Strain rate is increased
B. Grain size is increased
C. Prior cold deformation is increased
D. Not affected by any of the above parameters
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4
X-rays are
D. Of higher wavelength than visible light
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Which of the following varies as the square root of oil pressure during atomisation of fuel oil through a pressure jet burner?
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Nuclear fission of one atom of uranium-235 produces the energy equivalent to about __________ MeV.
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The ratio of the shear stress to the principal stress on a principal plane is
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4
Broaching tools are usually made of
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4
For the Stoke's law to be valid in the case of a falling sphere in a fluid, the
A. Reynolds number (based on sphere diameter) should be < 1
B. Flow around the sphere should be in turbulent region
C. Sphere must be metallic
D. Fluid density should be constant
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4
Unit of surface tension in S.I. unit is
B. Joule/
C. Newton/
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4
In troposphere (the weather domain), the temperature 't' at height 'h' above the sea level in metres is given by (where, temperature at sea level is 15°C and t is in °C.)
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Which of the following is not a principal alloying element for the structural steel?
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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?
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__________ is the process used for setting up compressive stresses in the surface of a metal to improve its fatigue strength.
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The order of a chemical reaction
A. Can be determined only experimentally
B. Can be determined from the stoichiometry of the reaction
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The highest stress that a material can withstand for a specified length of time without excessive deformation is called the __________ strength.
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4
Property responsible for the talcum powder to cling to the skin is the
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Which of the following is the most suitable material of construction for the condenser tubes, where the cooling medium is brine (salty water)?
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Cast iron contains __________ percent carbon.
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High speed steel tools retain their hardness upto a temperature of __________ °C.
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Eutectic reaction for iron-carbon system occurs at a temperature of __________ °C.