The activity of pure hydrogen gas at 1000°C and 5 atm pressure
Is always less than 1
Is always greater than 1
Can be 5
Depends on the choice of the standard state
- Principal alloying element in Elinvar (used for making hair springs for watches) is
- Which of the following is not a principal alloying element for the structural steel?
- A dense structure of grinding wheel is not used for the
- Thermal efficiency of an internal combustion engine is around __________ percent.
- As the fluid flow rate increases, the float of the Rotameter
- Powder metallurgy technique is used in the production of __________ tools.
- Silicon percentage in the silicon steel used for electrical appliances/equipments is
- The fugacity of liquid water at 298 K is approximately 3171 Pa. Considering the ideal heat of vaporisation…
- Increase in the entropy of a system represents the
- The life of a ball bearing is inversely proportional to
- __________ has the highest melting point out of the following.
- 'Cryogenics' is concerned with the generation & use of low temperature in the range of
- Addition of silicon to cast iron
- The maximum thickness of the metal which can be welded using ultrasonic welding is __________ mm.
- Spherical shape of mercury droplets is due to its
- Globular form of cementite is formed during the __________ process.
- If a solid is compressed adiabatically in its elastic range, its __________ remains constant
- Dew point temperature always gives an indication of the __________ of the moist air.
- Two wires of the same radius & material having length in the ratio of 1 : 2 are stretched by the same…
- Plasma is
- In case of condensers & evaporators operating under given terminal conditions, LMTD (logarithmic mean…
- Cold chisel & hammers are made of
- Which of the, following is not associated with the functioning of a petrol engine?
- Natural water contains approximately __________ percent of heavy water.
- For a thermodynamic system undergoing a process, which of the following pairs best expresses the relationship…
- All of the following alloying elements of steel increases hardness but sacrifice ductility, except
- Which of the following is used to produce draught in the locomotive boilers?
- A compact estimate about the amount of materials handling between various work stations is obtained…
- Most important property of steels for use in automobile bodies is the
- Thermal conductivity of a material does not depend upon its