Maximum amount of thermal radiation is emitted at all wavelengths at any specified temperature by a/an __________ body.
Grey
Black
Opaque
White
- The best lubricants for a machine working at high temperature & load is
- Which of the following properties of a solid is not dependent on crystal imperfection?
- Heat transfer by __________ is almost absent in case of fluidised bed drying operation.
- Which of the following is not the commercial name of poly-methyl-methacrylate (PMMA)?
- At absolute zero temperature, for any reaction involving condensed phases
- Air-petrol ratio in an automotive petrol engine is around
- Case hardening is not done by
- If the demand for an item is trebled and the order cost is reduced to one third, then the economic order…
- Which of the following hardness tests does not measure the indentation hardness of metals and alloys?
- Mho's scale of hardness, which consists of 10 standard minerals is used for the measurement of __________…
- In case of a, centrifugal pump, the ratio h1/h2 is termed as the __________ efficiency (where, h1 =…
- The difference between gross & net calorific values of fuel is due to the
- In condensers used in thermal power plants, steam is normally used in shell side and cooling water on…
- Stainless steel is welded with difficulty because of
- Removal of non-condensable from steam or other vapour is termed as the __________ process.
- Even though heat transfer co-efficient in boiling liquids is large, use of fins is advantageous, when…
- Breakeven point represents the condition, when the company runs under no profit no loss condition. In…
- Large diameter reinforced cement concrete (RCC) pipes are generally joined by __________ joint.
- 'Dikes' are low height walls made around the storage vessels meant for storing hazardous & inflammable…
- Principal alloying element in Elinvar (used for making hair springs for watches) is
- at 1173E; at equilibrium, what will be the number of moles of CO gas required to reduce one mole of…
- Minimum number of members required to form a Public Limited Joint Stock Com-pany is
- Titanium is produced by __________ of Ti Cl4.
- A furnace is made of a refractory brick wall of thickness 0.5 metre and thermal conductivity 0.7 W/m.°K…
- Oxide layer formed on the non-ferrous metal surface after its annealing is
- __________ is used for tying the steel columns to concrete foundation.
- Which of the following alloying elements is present in maximum percentage in high speed steel?
- Cold working of a material results in increase in hardness, which is termed as the __________ hardening.
- The passage between the nozzle and the __________ is called 'sprue' in case of injection moulding.
- Which of the following is an undesirable property of slag produced during the Pyrometallurgical method…