Maximum heat dissipation occurs from a steel wire (k = 0.5 W/m. k) of 15 mm diameter exposed to air (h = 20W/m2 .k), when the insulation thickness is __________ mm.
15
25
10
30
- The heat released by cooling one mole of copper from 400 K to room temperature (300 K) is (assume :…
- 'Dikes' are low height walls made around the storage vessels meant for storing hazardous & inflammable…
- The cooling rate required to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours is __________…
- Metalloids
- Which of the following is preferred for riveting?
- Silicon percentage in silicon steel used for electrical equipments is about
- Addition of __________ to steel does not impart hardness.
- Encyclopaedia of Chemical Technology has been
- A material is capable of resisting softening at high temperature, because of its property termed as
- Production of a hollow product by inflation of a tube or parison is called the __________ process.
- __________ joint is mostly used for joining pipes carrying water at low pressure.
- Thermal efficiency of an internal combustion engine is around __________ percent.
- __________ is used as a material of construction for the blade of power saw.
- Pick out the correct statement about the condensation.
- With increase in compression ratio, the volumetric efficiency of air compressor
- Nusselt number is related to the Reynolds number (Re) in turbulent & laminar flow respectively as
- Hot & cold working of material causes its __________ deformation.
- Most of the phosphorous present in the blast furnace burden enters into
- A fluid is termed as the Newtonian fluid, when the shear stress is __________ the velocity gradient.
- Wrought iron is never shaped by
- Spark plug is provided in a/an
- Blasting of tri-nitro-toluene (TNT) is done by mixing it with ammonium
- Steel is welded using the __________ flame.
- The emf of a Deniell cell Zn | Zn2+ || Cu2+ | Cu can be increased by
- For an ideal gas, Cp - Cv is
- The material used for coating the welding electrode is termed as the
- What is the critical radius of insulation (cms) for a metallic cylinder, if the convective heat transfer…
- The dimensional formula of bulk modulus of elasticity is same as that of the
- Pick out the wrong statement.
- Main constituent of bone ash is