Use of flux during soldering is done to__________?
__________ is the most suitable lubricant for drawing mild steel wires?
Fog is an example of colloidal system of__________?
A jet engine turbine blade is normally manufactured by__________?
Square steel key is normally strong in failure by shear & crushing. Keys are normally made of __________ steel bars?
Wrought iron does not have__________?
X-rays are__________?
In extrusion of metals, which of the following statement is true ?
A solar cell converts the sunlight directly into __________ energy?
The friction factor for the turbulent fluid flow in a rough pipe does not depend upon the__________?
Which of the following does not discharge the dust collected as a dry solid?
Hydro-cyclone is a__________?
Tin based white metals are used, where bearings are subjected to__________?
The cooling rate required to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours is __________ BTU/hr?
For preparation of porous bearings by powder metallurgy, preferred particle shape is__________?
__________ is the hardest oxide and is hence used where high wear resistance at high temperature is required?
Cobalt – 60 is used as a source of __________ in medical therapy & industrial radiography?
__________ is used for tying the steel columns to concrete foundation?
Alloys having more than 80% copper are generally more__________?
Friction factor for fluid flow in pipe does not depend upon the__________?
Which of the following is preferred for riveting ?
In case of simple harmonic motion, displacement is proportional to the__________?
A material in which the atoms are arranged regularly in some directions but not in others, is termed as ‘mesomorphous material’; an example of which is__________?
The best guide to judge the general quality of water is the measurement of its__________?
The maximum thickness of the metal which can be welded using ultrasonic welding is __________ mm ?
All of the following alloying elements of steel increases hardness but sacrifice ductility, except__________?
Stainless steel is welded using__________?
Fibre glass is a composite material of__________?
One face of a furnace wall is at 1030°C and the other face is exposed to room temperature (30°C). If the thermal conductivity of furnace wall is 3 W. m-1. k-1 and the wall thickness is 0.3 m, the maximum heat loss (in W/m) is__________?
Nuclear fission of one atom of uranium-235 produces the energy equivalent to about __________ MeV?
On being hit with a hammer, __________ will readily fracture?
The usual energy consumption in electric arc furnace steel making is __________ KWh/ton of steel ?
Which of the following does not have a sharp melting point ?
Recrystallisation temperature of steel is __________ °C?
Absolute zero pressure can be attained at a temperature of__________?
Corrosion of metals cannot be prevented by its__________?
Other parameters remaining same, the recrystallisation temperature of an alloy is lowered, when__________?
Which of the following rays has the least wavelength ?
Which of the following is not a principal alloying element for the structural steel ?
The following type of bonding is strongly directional in solids ?
Diffusion co-efficient of a metal in a solid solution depends upon its ?
Mild steel has __________ crystal lattice structure?
Wrought iron is never shaped by__________?
Reduction in the grain size reduces the __________ of the material?
Lead is poured into the joints between two __________ pipes?
The most economical channel section for the fluid flow is the one for which the discharge is maximum for a given cross-sectional area. Vertical velocity distribution in an open channel for laminar flow can be assumed to be__________?
Out of the following, the __________ pipe has the least corrosion resistance?
An alloy of Fe – 0.4 % C is__________?
Thermit welding uses the following energy source ?
Resistance of an electrical conductor is proportional to its (where, l = length and A = crosssectional area of the conductor)__________?
Which of the following has the highest value of refractive index ?

Metalloids________________?

A. Are good conductor of heat & electricity
B. Act as electron donors with metals & as electron acceptor with non-metals
C. Are not necessarily solids at room temperature
D. Are compounds that exhibit both metallic & non-metallic properties to some extent and are
exemplified by elements like germanium, silicon & boron

Correct Answer: D. Are compounds that exhibit both metallic & non-metallic properties to some extent and are
exemplified by elements like germanium, silicon & boron ✔

Last Updated: February 08, 2019