Q.1
Lead is added to 60:40 brass primarily to improve
Q.2
Specific __________ is a dimensionless quantity.
Q.3
Deformation band is absent in materials having __________ lattice crystal structure.
Q.4
The wet bulb temperature is lower in dry air than in wet air at the same temperature. A dry bulb thermometer registers a higher temperature than a wet bulb thermometer except at __________ percent relative humidity.
Q.5
Which is the most lethal weapon ?
Q.6
Out of the following, the most ductile material is
Q.7
With increase in temperature, the surface tension of water
Q.8
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
Q.9
__________ of air does not increase with increase in temperature.
Q.10
Cascade control is
Q.11
Case hardening is not done by
Q.12
Cassiterite is an ore of
Q.13
The maximum percentage of chromium that can be added to steel is about
Q.14
Vernier calipers can not be used to measure the
Q.15
The majority charge carriers in p-type silicon are
Q.16
The size of the tetrahedral void in the closest packing of atoms is __________ that of the octahedral void.
Q.17
Scaling occurs in boiler tubes due to the fact that, the solubility of Ca(OH)₂ __________ with increasing temperature.
Q.18
Out of the following, the lowest packing of atoms exists in __________ crystal lattice structure.
Q.19
A psychrometer does not measure the __________ temperature of moist air.
Q.20
Carnot cycle is also termed as the constant __________ cycle in thermodynamics.
Q.21
Pick out the wrong statement.
Q.22
Grain hardness is measured by the __________ hardness testing method.
Q.23
Out of the following, which will fracture most readity, when hit with a hard hammer ?
Q.24
Dezincification is a form of corrosion, which specifically applies to
Q.25
__________ can replace tungsten in high speed steel.
Q.26
'Flare tower' used in industry is meant for
Q.27
Two solutions A₁ & A₂ have pH value of 2 & 6 respectively. It implies that the solution
Q.28
The heat treatment to which the steel wire containing > 0.25% carbon is subjected to is
Q.29
Nusselt number is related to the Reynolds number (Re) in turbulent & laminar flow respectively as
Q.30
Oxygen cylinders used for autogenous (cutting/welding) purposes are
Q.31
Which of the following parameters is not responsible for the heat loss from a hot steam carrying bare pipe surface located in a room without fans ?
Q.32
Oxyacetylene reducing flame is used while carrying out welding on
Q.33
Oxyacetylene reducing flame is used while carrying out welding on
Q.34
A jig is used while __________ a hole.
Q.35
Which of the following heat treatment processes is usually applied to castings ?
Q.36
Compression ratio of an I.C. engine is the ratio of the
Q.37
The velocity at which individual particles from a fluidised bed are carried away by the fluid passing through it, is defined as the
Q.38
__________ of hard alloy and tool steel is done to make it easily machinable.
Q.39
To improve the machinability of steel, it is generally subjected to
Q.40
Out of the following, the dimensionless quantity is
Q.41
Load cells used for the measurement of weight has
Q.42
Pick out the wrong statement.
Q.43
Protection of ship hulls against sea water corrosion is done by coating with zinc because of the fact that zinc compared to iron is
Q.44
Eutectic reaction for iron-carbon system occurs at a temperature of __________ °C.
Q.45
High speed steel tools retain their hardness upto a temperature of __________ °C.
Q.46
If the head is doubled in & centrifugal pump, the power required will increase in the ratio of
Q.47
Boiler draught of 10 mm water column is equivalent to
Q.48
Factor of safety is the ratio of the __________ stress to the working stress.
Q.49
Electrolytic reduction cell used for conversion of calcined Al2O₃ to Al is a carbon lined furnace operating at 800-900 °C. The purpose of electric current supplied to the furnace is to
Q.50
The most suitable material of construction for a sewer to carry sewage under high pressure is
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