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You Are On Multi Choice Question Bank SET 319

15951. Which of the following will resist maxi-mum shock & vibration without cracking?

15952. Surface tension of a liquid

15953. For dynamic strain measurement, the wheatstone bridge used is of __________ type.

15954. Which drug is made from vegetables ?

15955. Which of the following are made out of the carbon steel having carbon content of 0.9 to 1% ?

15956. Material of construction of surveying metallic tapes is __________ which has low coefficient of expansion & enough strength.

15957. Welded joint is superior to revetted joint in respect of ease of fabrication, weight and strength. Which of the following joints is the most suitable for pipes carrying fluids under high pressure and temperature ?

15958. Silicon percentage in acid resistant cast iron is about

15959. Thermal expansion of solid is employed in the temperature measurement by a

15960. Stress and strain are related by __________ elastic constants for a linearly elastic, homogeneous & isotropic material.

15961. The behaviour of a metal specimen, which when plastically strained in tension reduces its yield stress in compression and vice versa; is termed as the

15962. Function of fusible plug in a boiler is to

15963. What is the range of tempering temperature (°C) for most of the materials ?

15964. Absorptivity of a grey body varies with the

15965. In radiative heat transfer, a grey surface is the one, which has

15966. Overheating of satellites during re-entry to earth is controlled by

15967. The most abundant metal present in the earth's crust is;

15968. Pick out the wrong statement:

15969. The tensile strength of plastics ranges from __________ kg/mm2.

15970. In case of Contributory president Fund,an amount not less than what percent of basic pay of employee is to be deducted as his contribution?

15971. Grain hardness is measured by the __________ hardness testing method.

15972. The thermal efficiency of a heat engine giving an output of 4 KW with an input of 10000 Joules/sec is __________ percent.

15973. Which of the following alloying elements when added in steel does not improve its lachinability ?

15974. Largest application of laser welding is in __________ welding.

15975. Which of the following is a neutral flux used in the pyrometallurgy of metal extraction?

15976. The critical pressure at which the latent heat of vaporisation of steam becomes zero is __________ Kg/cm2 .

15977. Value of a material is usually considered as a relationship between

15978. Which of the following is not an ore of zinc?

15979. Pressure gauges are never connected directly to the live steam line; rather a loop or syphon is interposed as close as possible to the pressure gauge. This is done to

15980. Phosphorous is added to copper melt to

15981. Which of the following is not a suitable solid lubricant ?

15982. On an average __________ fast neutrons are produced by nuclear fission of each atom of uranium-235.

15983. Castability of aluminium is increased by the addition of __________ in it.

15984. Addition of __________ to steel can not impart it high strength at elevated temperature.

15985. Hard magnetic materials have high

15986. The difference in the properties of a substance in three states of matter depends upon the

15987. Ignition of fuel in a diesel engine is by

15988. What is the critical radius of insulation (cms) for a metallic cylinder, if the convective heat transfer co-efficient with the ambient atmosphere is 5 W/m2. °K ? Thermal conductivity of metal and insulation material are 40 and 0.1 W/m.°K respectively.

15989. Which set of materials is used as a moderator in nuclear reactor ?

15990. Malleabilisation heat treatment is performed on

15991. For hardening high alloy steel, it is to be heated slowly and uniformly to avoid

15992. Disposable patterns are made of

15993. The type of water filter normally employed/ preferred for treating small quantities of water in railway stations and individual industries is the __________ filter.

15994. The radioactive isotope of hydrogen is

15995. Refrigerative cooling employed during long distance transportation of food stuffs is normally done by

15996. Internal cracks in drawn bars are due to

15997. Yield strength of a polycrystalline metal with an average grain size, d, is proportional to

15998. A pipeline buried in soil is commonly protected from corrosion by

15999. Circulation of liquid metal (i.e. molten sodium) in a liquid metal cooled nuclear reactor is done by a/an __________ pump.

16000. Titanium is produced by __________ of Ti Cl4.

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