Co-efficient of performance of a Carnot cycle refrigerator operating between - 23°C and + 27°C is
3
5
0.5
1.5
- Thermistors are used in __________ devices.
- Electrometallurgy is not involved in the extraction of __________ from its ore.
- Limestone is added in the blast furnace (during pig iron manufacture) to
- Which of the following is not a dielectric material?
- During sensible cooling of air, its wet bulb temperature
- X-rays are
- Atomic __________ is a whole number for an element.
- Carbide tipped cutting tools are manufactured by powder metallurgy techniques and have a composition…
- Theoretical volume of oxygen required for complete combustion of 1Nm3 of acetylene, in oxyacetylene…
- The most important consideration in value engineering is the
- Recrystallisation temperature of steel is __________ °C.
- Two wires of the same radius & material having length in the ratio of 1 : 2 are stretched by the same…
- Out of the following, the joint produced by __________ has the lowest strength.
- The elastic strain energy of a unit length of an edge dislocation as compared to that of a screw dislocation…
- Silicon crystal can be converted to p-type semiconductor by doping with
- Pick out the wrong statement.
- Thermal equivalent of electrical power in practical calculation is __________ kcal/kWh.
- For grinding of softer materials, the grinding wheel should have __________ grain size.
- __________ of austenite decreases the hardenability in steel.
- Machinability of hard alloys and tool steels is improved by
- Good design of the casing of a centrifugal pump aims at minimising the
- __________ is a special constituent of chlorophyll without which photosynthesis is not possible.
- Which of the following is a commonly used manometric liquid for low pressure range?
- Normalising of an object does not
- Thermodynamic cycle involved in the working of a thermal power plant is the __________ cycle.
- Cobalt - 60 is used as a source of __________ in medical therapy & industrial radiography.
- Fog is an example of colloidal system of
- Fine grained steels have
- Triple point of water is
- In case of simple harmonic motion, displacement is proportional to the