Q.1
L.D. converters are generally lined with
Q.2
The ability of a substance to assume two or more crystalline structure is called
Q.3
Which of the following forces does not act on a fluid at rest?
Q.4
A simple closed grinding circuit may consist of
Q.5
Which of the following is categorised as the plastic welding?
Q.6
Yield strength of a material is determined by the __________ test.
Q.7
Steel & cast iron pipes are produced by __________ casting.
Q.8
The noble metals
Q.9
Filler material used in welding should have __________ as compared to the parent metal to be welded.
Q.10
Euler number is defined as the ratio of inertia force to __________ force.
Q.11
Existence of velocity potential implies that the fluid is
Q.12
Ferrites are __________ magnetic.
Q.13
The most prominent single cause of corrosion in boilertubes, drums, economisers and steam superheaters in a thermal power plant boiler is the
Q.14
Which of the following emissions in the exhaust gas of an I.C. engine causes the formation of photochemical smog?
Q.15
Work done by a/an __________ process is determined by ∫p.dV.
Q.16
The cathode in an electrochemical cell always carries
Q.17
Rockwell number represents the
Q.18
Electric arc furnace is employed mainly for the production of __________ steel.
Q.19
Powder metallurgy technique is used in the production of __________ tools.
Q.20
Which of the following is normally not found in both the S.I. (petrol) & C.I. (diesel) engines?
Q.21
The leaching solvent used in Baeyer's process for the purification of bauxite is
Q.22
The unit of gc is
Q.23
A thermally thin body is the one for which
Q.24
The property of material, by which a given amount of energy is absorbed by it without plastic deformation, is called the
Q.25
Pick out the wrong statement.
Q.26
Preheating before welding is done to
Q.27
Which of the following is a weak acid?
Q.28
The 'laughing gas' is
Q.29
Pick out the wrong statement.
Q.30
Boiling temperature of carbon dioxide at atmospheric pressure is __________ °C.
Q.31
Silicon percentage in the silicon steel used for electrical appliances/equipments is
Q.32
Addition of small amount of __________ to grey cast iron is done to produce nodular grey cast iron.
Q.33
The elastic strain energy of a unit length of an edge dislocation as compared to that of a screw dislocation is
Q.34
Wavelength of radiation emitted by a body depends on the __________ of its surface.
Q.35
Babbit lining is used on brass/bronze bearings to increase the
Q.36
Out of the following, __________ pipe is the least corrosion resistant.
Q.37
Out of the following, the most melleable material is
Q.38
Silicon percentage in the silicon steel used for electrical appliances/equipments is
Q.39
Endurance is a measure of fatigue limit of a metal. Fatigue crack in nitrided machine parts originates
Q.40
The type of water filter normally employed/ preferred for treating small quantities of water in railway stations and individual industries is the __________ filter.
Q.41
Large diameter shafts are manufactured by
Q.42
Fatigue strength of a material can not be increased by
Q.43
Stainless steel is welded using
Q.44
Pick out the wrong statement about the machinability of metals. Machinability of a metal
Q.45
Cementite is in the lamellar form in the __________ phase of steel.
Q.46
Otto cycle used in spark ignition petrol engines is also known as the constant __________ cycle.
Q.47
The mechanism which changes the value of manipulated variable in response to the output signal from the control unit is called the
Q.48
__________ are not emitted by radioactive substances.
Q.49
Addition of __________ to steel does not impart hardness.
Q.50
The ability of tool steel to resist softening at high temperatures is termed as __________ hardness.
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