821. Saturated steam at a pressure of 25 kg/cm² is throttled to attain 5 kg/cm² . Then the outcoming steam will be
A. Wet
B. Saturated
C. Superheated
D. None of these
✅ The correct answer is option C.
Engineering
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822. The dew point of moist air becomes __________ with decrease in its relative humidity.
A. Less than the wet bulb temperature
B. More than the wet bulb temperature
C. More than the dry bulb temperature
D. Equal to wet bulb temperature
✅ The correct answer is option A.
823. Matte smelting is used in the extraction of
A. Lead
B. Zinc
C. Aluminium
D. Copper
✅ The correct answer is option D.
824. Nitriding of steel is a process for
A. Case hardening
B. Spheroidising
C. Normalising
D. Annealing
✅ The correct answer is option A.
825. The conventional mechnical transducer, which converts pressure signal to displacement signal is
A. Spring
B. Manometer
C. Strain gauge
D. None of these
✅ The correct answer is option B.
826. Dielectric
A. Is an electrical insulating material
B. Of low resistivity is preferred
C. Should have high thermal conductivity
D. Need not defy the corrosive action of chemicals
✅ The correct answer is option A.
827. Salvage value is the most flexible criteria for analysing a financial investment. ‘Salvaging’ means
A. Disposing off a machine/property on as is where is basis
B. Disposing off machine/property, which is no longer useful in the present scenerio
C. Mortgaging the obsolete machine/property
D. Writing off the obsolete machine/ property
✅ The correct answer is option B.
828. Coating provided on the electrodes used in the arc welding is not expected to
A. Add alloying elements
B. Prevent electrode from contamination
C. Stabilise the arc
D. Provide protective atmosphere to weld
✅ The correct answer is option B.
829. The main charge in blast furnace is usually
A. Iron ore & coke
B. Iron ore, coke & air
C. Limestone, coke & iron ore
D. Limestone, sand & iron ore
✅ The correct answer is option C.
830. The majority charge carriers in p-type silicon are
A. Free electrons
B. Ions
C. Conduction electrons
D. Holes
✅ The correct answer is option D.