Q.1
The difference in the properties of a substance in three states of matter depends upon the
Q.2
Steel rods are normally used for concrete reinforcement because concrete and steel have almost equal
Q.3
Temper brittleness of a material can be fairly detected by the __________ test.
Q.4
Hardening of steel is not possible, unless it is heated __________ critical point.
Q.5
In electrical resistance welding, distortion results from the use of improper
Q.6
With increase in pressure, the latent heat of steam
Q.7
Oxide layer formed on the non-ferrous metal surface after its annealing is
Q.8
Which of the following metals can not be hot worked at room temperature?
Q.9
Improvement in mechanical properties of metals in its hot working is due to the grains
Q.10
High __________ of cast iron makes it suitable for use in machine beds.
Q.11
Increasing sulphur content in pig iron tends to make it
Q.12
Springback in sheet metal bending depends on the
Q.13
Pick out the wrong statement about nucleate boiling.
Q.14
Pick out the correct statement about the condensation.
Q.15
__________ circuit is most commonly used to measure strain with the help of a strain gauge.
Q.16
Solidification time of a molten metal in a casting is proportional to (where, V = volume of metal & A = its surface area ; in the casting)
Q.17
Surface tension of a liquid
Q.18
__________ test determines the yield strength, Young's modulus of elasticity, percentage reduction in area & percentage elongation of a material.
Q.19
Duralumin is an alloy of aluminium and copper. Percentage of copper in duralumin is
Q.20
Number of electrons in the outermost orbit of a semi-conductor is
Q.21
Pick out the wrong statement about powder metallurgy technique.
Q.22
Which of the following is not used as a bearing material?
Q.23
Which of the following heat treatment processes is used for softening the hardened material?
Q.24
Spark plug is provided in a/an
Q.25
Springs are not made of
Q.26
__________ glass is used in the mercury in glass thermometer meant for measuring a temperature of 500°C.
Q.27
Which of the following is not a suitable solid lubricant?
Q.28
Diamond does not conduct electricity, because
Q.29
The dimensional formula of bulk modulus of elasticity is same as that of the
Q.30
Surface finish of casting does not depend upon the
Q.31
For separating small pieces of metal from engine oil of a car, the best separating technique is the
Q.32
X-rays are
Q.33
Minimum thermal efficiency of a steam boiler may be around __________ percent
Q.34
Current asset of a factory includes the
Q.35
In the blast furnace, incorporation of water vapour in the blast gives the following effect.
Q.36
Maximum carbon content in cast iron is __________ percent.
Q.37
Which one can be directly solidified from gaseous state wihtout entering into liquid state?
Q.38
Failure of a material is attributed to __________ if it fails below its yield point.
Q.39
The minimum and the maximum number of members required to form a Private Limited Joint Stock Company are respectively
Q.40
The elastic strain in copper is due to the
Q.41
The ratio of the shear stress to the principal stress on a principal plane is
Q.42
Which of the following has the highest value of refractive index?
Q.43
A machine having assumed life of 20 years is purchased for Rs 32000/-. Its scrap value at the end of its life is Rs 8000/-. If the depreciation is calculated by diminishing balance method, then percentage reduction in its value at the end of first year is __________ percent.
Q.44
Brittleness induced due to the presence of sulphur in steel can be reduced by adding
Q.45
Optical activity is a/an __________ property.
Q.46
The most important requirement for aluminium industry is the availability of cheap
Q.47
Wrought iron is not
Q.48
Pick out the wrong statement.
Q.49
Which of the following is a synthetic abrasive ?
Q.50
Frother is added in the froth floatation cell used in ore beneficiation to stabilise the air bubbles (i.e., froth), which will hold the ore particles, but it does not affect the floatability of minerals. Which of the following is not used as a frother?
0 h : 0 m : 1 s