With increase in __________ Knocking tendency in a spark ignition petrol engine decreases.
Supercharging
Wall temperature
Compression ratio
Engine speed
- With increase in steam pressure, its specific volume decreases
- Which of the following varies as the square root of oil pressure during atomisation of fuel oil through…
- Minimum thermal efficiency of a steam boiler may be around __________ percent
- The thickness of oxide film is y at time t. If are the temperature dependent constants, the parabolic…
- Which of the following is not a dielectric material?
- Shampoos are commercially not available in the form of
- Temperature attained in soldering of metals is about __________ °C.
- Thermodynamic cycle involved in the working of a thermal power plant is the __________ cycle.
- An ideal material for making cooking vessels should have
- The difference in one unit of Rockwell hardness number corresponds to a difference in the depth of indentation…
- Though tin occurs lower than iron in the electrochemical series, yet it is coated on steel for corrosion…
- Upto the critical radius of insulation, added insulation, will
- For a thermodynamic system undergoing a process, which of the following pairs best expresses the relationship…
- Probability of cavitation occuring becomes very high, when the local __________ resulting in water bubbles…
- What is the range of tempering temperature (°C) for most of the materials?
- Young's modulus of a material is the measure of its
- Maximum heat dissipation occurs from a steel wire (k = 0.5 W/m. k) of 15 mm diameter exposed to air…
- Silicon percentage in silicon steel used for electrical equipments is about
- With increase in temperature, the electrical conductivity of semiconductors
- Metal shots used in shot blasting are made of
- What is the critical radius of insulation (cms) for a metallic cylinder, if the convective heat transfer…
- __________ glass is used in the mercury in glass thermometer meant for measuring a temperature of 500°C.
- Preheating before welding is done to
- Large diameter reinforced cement concrete (RCC) pipes are generally joined by __________ joint.
- The expected efficiency of a single riveted lap joint is of the order of 50%. If the thickness of the…
- The difference between gross & net calorific values of fuel is due to the
- Which of the following materials does not form adherent oxide film on surface?
- The property of material, by which a given amount of energy is absorbed by it without plastic deformation,…
- All the atoms of the world comprise of electrons, proton & neutron except that of __________ atom in…
- Speisses is a mixture of the following: