Related Questions
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The most important consideration in value engineering is the
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In chemical dehumidification of air
A. Both specific humidity & dry bulb temperature increases
B. Both specific humidity & dry bulb temperature decreases
C. Specific humidity decreases & dry bulb temperature increases
D. Specific humidity increases & dry bulb temperature decreases
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4
Super conduction in metals is observed at a temperature of __________ °K.
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4
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
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High speed steel tools retain their hardness upto a temperature of __________ °C.
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The cooling rate required to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours is __________ BTU/hr.
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Which of the following is normally not found in both the S.I. (petrol) & C.I. (diesel) engines?
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Strain hardening effect in metals subjected to cold working is due to the __________ mechanism.
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The stress at which extension of the material takes place more rapidly as compared to the increase in load is termed as the __________ point of the material.
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For an ideal gas, Cp - Cv is
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In the formation of cermets, the ratio of ceramic material to metallic material is usually 80:20. Which of the following is a cermet?
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Which one is neutral in character?
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The effect of friction on the flow of steam through a nozzle is to decrease the __________ of steam.
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Change in volume of metals from absolute zero temperature to their melting points is
A. Almost same for all metals
B. Different for different metals
C. Less for low melting point metals
D. Less for high melting point metals
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4
While the thermosetting polymers are amorphous in nature, the thermoplastic polymers are either amorphous or crystalline. The crystalline polymers are characterised by the
C. Better finish and surface appearance
D. High plastic deformation
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Eutectoid composition of carbon steel at room temperature is
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Globular form of cementite is formed during the __________ process.
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Laser welding is widely employed in the __________ industries.
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All of the following alloying elements of steel increases hardness but sacrifice ductility, except
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Neutrons are present in all atoms except that of
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Pick out the wrong statement.
A. A ferromagnetic material becomes paramagnetic above the 'Curie temperature'
B. Permanent magnets are made of hard materials, whereas electromagnets require soft magnetic materials
C. Soft magnetic materials (e.g., pure iron) have higher permeability and low hysterisis loss and coercive forces
D. Tungsten steel and alnico are not hard magnetic materials
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In the Bayer's process, bauxite is digested under pressure using
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Brittleness induced due to the presence of sulphur in steel can be reduced by adding
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Even though heat transfer co-efficient in boiling liquids is large, use of fins is advantageous, when the entire surface is exposed to __________ boiling.
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Broaching tools are usually made of
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A steam carrying pipeline is insulated with two layers of insulating materials with the inferior insulation material forming the inner part. If the two insulating layers are interchanged, the heat conducted will
D. May increase or decrease; depends on the thickness of each layer
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Earing is a defect found in steels after the following metal working operation.
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4
In the diving apparatus, helium is used along with oxygen, because it is
B. Not soluble in blood at high pressure
D. Completely miscible with oxygen
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The most important requirement for aluminium industry is the availability of cheap
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Parallel straight line pattern of temperature distribution for both hot and cold fluids is observed in case of heat exchanger of the type
A. Parallel flow with equal heat capacities
B. Counter flow with equal heat capacities
C. Counter flow with unequal heat capacities
D. Parallel flow with unequal heat capacities