Description : Organic catalysts differ from the inorganic catalyst in the sense that the former is (A) Active at cryogenic temperatures only (B) Prohibitively costly (C) Proteinous in nature (D) Active at very high temperature only
Last Answer : (C) Proteinous in nature
Description : 'Cryogenics' is a science dealing with – (1) high temperatures (2) low temperatures (3) friction and wear (4) growth of crystals
Last Answer : (2) low temperatures Explanation: Cryogenics is the study of how to get to low temperatures and of how materials behave when they get there. Besides the familiar temperature scales of Fahrenheit and ... modern processes being used to treat metals (as well as other materials) is cryogenic tempering.
Description : ‘Cryogenics’ is a science dealing with (1) high temperatures (2) low temperatures (3) friction and wear (4) growth of crystals
Last Answer : low temperatures
Description : Hydrogen is recovered from coke oven gas on commercial scale (as practised in fertiliser plant at Rourkela) by (A) Adsorption on palladium (B) Cryogenic operations (low temperature cooling) (C) Absorption (using ethanolamine or pyrogallol solution) (D) None of these
Last Answer : (B) Cryogenic operations (low temperature cooling)
Description : Cryogenic Science is related to
Last Answer : Lower temperature
Description : Superconductors are those elements – (1) Whose conductivity is intermediate between metals and insulators (2) Whose resistance falls almost to zero at very low temperature (3) Which conduct electricity only at super-high temperature (4) Which conduct electricity only, at super-high temperatures
Last Answer : (2) Whose resistance falls almost to zero at very low temperature Explanation: Superconductivity is a phenomenon of exactly zero electrical resistance and expulsion of magnetic fields occurring in ... lines from the interior of the superconductor as it transitions into the superconducting state.
Description : In which technology do Cryogenic engines find applications?
Last Answer : – Rocket technology
Description : Superconductors are those elements (1) Whose conductivity is intermediate between metals and insulators (2) Whose resistance falls almost to zero at very low temperatures (3) which turn into insulators at very low temperatures (4) which conduct electricity only at super-high temperatures
Last Answer : Whose resistance falls almost to zero at very low temperatures
Description : The science dealing with the study of phenomena at very low temperatures is known as (a) refrigenics (b) cytogenics (c) frozenics (d) cryogenics
Last Answer : Ans:(d)
Description : How does the high/low temperatures, the barometric pressure, and the relative humidity influence what kinds of clouds are out?
Last Answer : answer:Yikes. The formation of clouds is an application of the First Law of Thermodynamics. According to the First Law, a change in the internal energy of a system can be due to the ... for air under these conditions is the moist adiabatic lapse rate and is approximately -5oC per kilometer.
Description : When applying to pressure ratings listed in ASME B16.5 at high or low temperatures which of the following must be considered? a) Risk of leakage due to forces and moments developed. b) Bursting of the flanged fitting. c) The bolting forces at the flange. d) All of the above.
Last Answer : a) Risk of leakage due to forces and moments developed.
Description : Pick out the wrong statement. (A) A particular chemical reaction is more temperature sensitive at low temperatures (B) A very high value of equilibrium constant, K (K >> 1) indicates that the ... ) Non-ideal flow takes place in reactors due to recycling, channeling or by creation of stagnant regions
Last Answer : (C) The intercept of the Arrhenius plot is called the 'activation energy
Description : The study of phenomena at very low temperatures is called - (1) heat transfer (2) morphology (3) crystallography (4) cryogenics
Last Answer : (4) cryogenics Explanation: A person who studies elements that have been subjected to extremely cold temperatures is called a cryogenicist.
Description : Which of the following principle is used to produce low-temperatures'? (1) Super conductivity (2) Joule-Kelvin effect (3) Thermo-electric effect (4) Adiabatic demagnetization
Last Answer : (4) Adiabatic demagnetization Explanation: Magnetic refrigeration is a cooling technology based on the magnetocaloiic effect. This technique can be used to attain extremely low temperatures, as well as the ... of a suitable material is caused by exposing the material to a changing magnetic field.
Description : Which of the following principle is used to produce ‘low-temperatures’ ? (1) Super conductivity (2) Joule-Kelvin effect (3) Thermo-electric effect (4) Adiabatic demagneti-sation
Last Answer : Adiabatic demagneti-sation
Description : Molten sodium (as a coolant in fast breeder reactor) (A) Can’t attain high temperature at normal pressure (B) Is not at all corrosive, even at a higher temperature (C) Is highly radioactive at elevated temperatures and can cause explosion, when it comes in contact with air or water (D) None of these
Last Answer : (C) Is highly radioactive at elevated temperatures and can cause explosion, when it comes in contact with air or water
Description : Has anyone been brought back from cryogenic freezing?
Last Answer : No.
Description : Did scientists test whether cryogenic freezing works?
Last Answer : certain frogs can be frozen rock solid and then thawed without any problems.
Description : In which technology do Cryogenic engines find applications? -General Knowledge
Last Answer : The answer is 'Rocket technology'
Last Answer : answer:
Description : Pick out the wrong statement. (A) Percentage of ash in coke produced from medium coking coal is more than that in coal (B) The calorific value (kcal/Nm3 ) of coke oven gas reduces on ... plants in India at Talcher (Orissa) and Ramagundam (A.P) employ Kopper-Totzek process of coal gasification
Last Answer : (C) Ash is normally removed as 'fly-ash' in Kopper-Totzek process of coal gasification
Description : Which of the following is the costliest source of hydrogen needed for ammonia manufacture under Indian condition? (A) Electrolysis of water (B) Cryogenic removal of H2 from coke oven gas (C) Steam reforming of naphtha (D) Natural gas cracking
Last Answer : (A) Electrolysis of water
Description : Commercial production of hydrogen for the manufacture of nitrogenous fertilisers is done by (A) Steam reforming of naphtha and cracking of natural gas (B) Electrolysis of water (C) Cryogenic separation of hydrogen from coke oven gas (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Hydrogen gas is not produced commercially (for nitrogenous fertiliser manufacture) by (A) Iron-steam reaction (B) Electrolysis of water (C) Steam reforming of naphtha (D) Its cryogenic separation from coke oven gas
Last Answer : (A) Iron-steam reaction
Description : Hydrogen can be (A) Used in I.C. engines as fuel (B) Liquefied & stored under cryogenic conditions (C) Produced by electrolysis of water (D) All (A), (B) & (C)
Last Answer : (D) All (A), (B) & (C)
Description : 1. In which technology do Cryogenic engines find applications? 2. Shovna Narayan is a reputed personality in which field? 3. During which Plan did prices show a decline? 4. Which instrument used ... unit of area? 20. Krishnadeva Raya wrote a famous work, namely Amuktamalyada, in which language?
Last Answer : Answer : 1. Rocket technology 2. Classical dance 3. First 4. wind vane 5. Broach 6. D 7. Not even once 8. Titanium 9. To measure wind velocity 10. Anangpal 11. Pt. Ravi Shankar 12. Alam ... Tughlaq 16. Multi-Party 17. Less heat and less cold 18. RBI 19. Wet evergreen equatorial forests 20. Telugu
Description : The wavelength at which the peak of intensity of blackbody radiation Occurs – (1) increases with increase in temperature (2) decreases with increase in temperature (3) is the same at all temperatures (4) does not follow any pattern as temperature changes
Last Answer : (2) decreases with increase in temperature Explanation: According to Wien's displacement law, when the temperature of a blackbody radiator increases, the overall radiated energy increases. ... to its temperature. Shorter-wavelength (higher-frequency) light corresponds to higherenergy photons.
Description : The wavelength at which the peak of intensity of blackbody radiation occurs (1) increases with increase in temperature (2) decreases with increase in temperature (3) is the same at all temperatures (4) does not follow any pattern as temperature changes
Last Answer : decreases with increase in temperature
Description : What must be considered when using flanges at the ratings listed in ASME B16.5 at low temperatures? a) Toughness. b) Shock loadings. c) Sudden changes of stress or temperature. d) All of the above.
Last Answer : c) Sudden changes of stress or temperature.
Description : Which branch of science deals with matter and energy ?
Last Answer : Physics and energy are discussed in the branch of physics.
Description : Efficiency of a heat engine working on Carnot cycle between two temperature levels depends upon the (A) Two temperatures only (B) Pressure of working fluid (C) Mass of the working fluid (D) Mass and pressure both of the working fluid
Last Answer : (A) Two temperatures only
Description : The temperatures of the ideal gas temperature scale are measured by using a ______. A. Constant-volume gas thermometer B. Constant-mass gas thermometer C. Constant-temperature gas thermometer D. Constant-pressure gas thermometer
Last Answer : Constant-volume gas thermometer
Description : The greater the pressure gradient the: a. Closer the isobars and the lower the temperatures b. Further the isobars will be apart and the higher the temperature c. Closer the isobars and the stronger the wind
Last Answer : c. Closer the isobars and the stronger the wind
Description : The greater the pressure gradient the: a. Closer the isobars and the lower the temperatures b. Further the isobars will be apart and the higher the temperature c. Closer the isobars and the stronger the wind d. Further the isobars will be apart and the weaker the wind
Description : When flanged fittings are to be used at temperatures below -20°F, what pressure rating is to be used? a) The pressure rating at the actual service temperature, found by interpretation. b) The pressure ... to the flange class. d) Flanges complying with ASME B16.5 may not be used below -20°F.
Last Answer : b) The pressure rating at -20°F.
Description : Pycnometer is an instrument used to measure the – (1) Density (2) Intensity of solar radiation (3) Intensity of earthquake (4) High temperatures
Last Answer : (1) Density Explanation: A gas pycnometer is a laboratory device used for measuring the density - or more accurately the volume - of solids, be they regularly shaped, porous or non-porous, ... , employing some method of has displacement and the volume-pressure relationship known as Boyle's Law.
Description : Pycnometer is an instrument used to measure the (1) density (2) intensity of solar radiation (3) intensity of earthquake (4) high temperatures
Last Answer : density
Description : What is the Taiga's high and low temperatures?
Last Answer : What is the answer ?
Description : Which of the following conditions indicates that a lead-acid battery is being charged too rapidly? A. Sparks occurring at the positive terminal. B. Unusually high electrolyte specific gravity. C. Low plate potentials being developed. D. Excessively high temperatures and gassing rates.
Last Answer : Answer: D
Description : Electrical machinery insulation will break down more rapidly due to _________________. A. low loading of motors and generators B. frequent megger testing C. high temperatures and vibration D. high operating frequencies
Last Answer : Answer: C
Description : A semiconductor is a material with a _____________. A. conductivity higher than a normal conductor B. conductivity higher than a normal insulator C. high conductivity at low temperatures D. low conductivity at high temperatures
Last Answer : Answer: B
Description : Copper is often used as an electrical conductor because it _______________. A. has high resistance at low temperatures B. has a highly polished surface C. is able to pass current with little opposition D. holds insulation together well
Description : Where a thermal-acting breaker is required to be used in an area of unusually high, low, or constantly fluctuating temperatures, an ambient compensating element must be used. This element consists of ... arm B. conical spring on the contact arm C. second bimetal element D. second electromagnet
Description : Thermocouple is suitable for measuring (A) Liquid temperatures only (B) Very high temperatures only (C) Very low temperatures only (D) Both high and low temperatures
Last Answer : (D) Both high and low temperatures
Description : For a dielectric which of the following properties hold good? a) They are superconductors at high temperatures b) They are superconductors at low temperatures c) They can never become a superconductor d) They have very less dielectric breakdown voltage
Last Answer : b) They are superconductors at low temperatures
Description : What predicts the approximate molar specific heat at high temperatures from the atomic weight? A. Third law of thermodynamics B. Law of Dulong and Petit C. Mollier diagram D. Pressure-enthalpy diagram
Last Answer : Law of Dulong and Petit
Description : Three of the following statements about enzymes are correct and one is wrong. Which one is wrong? (a) Enzymes require optimum pH for maximal activity. (b) Enzymes are denatured at high temperature but ... - 90°C. (c) Enzymes are highly specific. (d) Most enzymes are proteins but some are lipids.
Last Answer : (d) Most enzymes are proteins but some are lipids.
Description : Which of the following statements about enzymes is wrong? (a) Enzymes are denatured at high temperatures. (b) Enzymes are mostly proteins but some are lipids also. (c) Enzymes are highly specific. (d) Enzymes require optimum pH and temperature for maximum activity
Last Answer : (b) Enzymes are mostly proteins but some are lipids also.
Description : Which of the following statements regarding evacuated tube collectors (ETC) are true? i) ETC is used for high temperatures upto 150oC ii) because of use of vacuum between two concentric glass tube, higher amount of heat is ... upon the ambient temperature i & iii b) ii & iii c) i & iv d) i & ii
Last Answer : d) i & ii