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Study the following statements regarding creep.
i) Creep is greater on curves than on tangent railway track
ii) Creep in new rails is more than that in old rails
iii) Creep is more on steep gradients than on level track
The correct answer is
Seven people, Kamal, Nalini, Namrata, Sheela, Shakti, Arun and Sukanya, study three different subjects - Mathematics, Science and Physics in three different schools - P, Q and R. Less than two and no more than three people study the same subject. Less than two and not more than three people study in the same school. Namrata studies Mathematics in school P which has only one more student named Shakti. Kamal does not study in school R but he is a student of mathematics. Shakti and Sukanya study the same subject. Sheila studies physics in school R. Nalini is also a student of school R. Arun and Sukanya do not study in school R. Nalini and Shakti study science. Arun is a student of which subject?
Ramesh has made a schedule of studying his seven subjects on each day. He decided to study maths on Friday and two days after it he will study English. He decided to study Science on Wednesday and after it Social Science. He decided not to study Arts on either Monday or Tuesday. 3 days before Friday he will study Hindi. He will study GK on someday as well. Which subject will he study on Thursday?
Consider a deep-space probe constructed as 1 m diameter polished aluminum sphere. Estimate the equilibrium temperature that the probe reaches if the solar energy received is 300 W/m2. For solar radiation, absorptivity of aluminum is 0.3 and the average emissivity appropriate for aluminum at low temperature is 0.04
Consider the following statements about Bligh’s Creep Theory. i. Creep length is the length of path traversed by percolating water ii. To increase the path of percolation vertical cut-off or sheet piles can be provided iii. Loss of head per unit creep length is hydraulic gradient iv. Bligh gave no criteria for the safety of weir against undermining Which of the following statements are correct?
Which option is correct about the electrolytic cell are correct? Many metals like Na, Mg, Al, etc. are produced on a large scale by electrochemical reduction of their respective cations where no suitable chemical reducing agents are available for this purpose. Sodium and magnesium metals are produced by the electrolysis of their fused chlorides and aluminum is produced by electrolysis of aluminum oxide in the presence of cryolite.
Study the following statements.
(i) Hydraulic lime is suitable for white washing,
(ii) Fat lime is suitable for whitewashing,
(iii) Hydraulic lime is suitable for making mortar,
(iv) Fat lime is suitable for making mortar.
(a) Study of conservation and safety of the natural environment. (b) Study about the responsibilities and duties of human beings towards improving the existing natural environment. (c) Study about the mutual interdependence of the living world and the non-living world. (d) Study the causes of degradation of the natural environment and its evil consequences. From an educational point of view, in what sequence the above-mentioned study matters should be taught to the learners of the primary classes?
The most common creep rate corresponds to which the creep strength is specified is _________
A 10 kW drilling machine is used to drill a bore in a small aluminum block of mass 8 kg. How much is the rise in temperature (in °C) of the block in 2.5 minutes, assuming 50% of power is used in heating the machine? Specific heat of aluminum = 0.91 kJ/kg°C