Identical objects of four different materials are heated to the same high temperature. Which of the following would least likely burn your hand if touched?  a. aluminium  b. brass  c. glass  d. concrete

Identical objects of four different materials are heated to the same high temperature. Which of the following would least likely burn your hand if touched?  a. aluminium  b. brass  c. glass  d. concrete
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If a certain amount of dry ice is mixed with same amount of water at 80°C, the final temperature of mixture will be  (a) 80°C  (b) 0°C  (c) 40°C  (d) 20°C  (e) 60°C.

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Last Answer : Answer : b

According to Avogadro’s law, for a given pressure and temperature, each molecule of a gas  (a) occupies volume proportional to its molecular weight  (b) occupies volume proportional to its specific weight  (c) occupies volume inversely proportional to its molecular weight  (d) occupies volume inversely proportional to its specific weight  (e) occupies same volume.

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According to Avogadro’s Hypothesis  (a) the molecular weights of all the perfect gases occupy the same volume under same conditions of pressure and temperature  (b) the sum of partial pressure of mixture of two gases is sum of the two  (c) product of the gas constant and the molecular weight of an ideal gas is constant  (d) gases have two values of specific heat  (e) all systems can be regarded as closed systems.

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Last Answer : Answer : a

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A manufacturer claims to have a heat engine capable of developing 20 h.p. by receiving heat input of 400 kcal/mt and working between the temperature limits of 227° C and 27° C. His claim is  (a) justified  (b) not possible  (c) may be possible with lot of sophistications  (d) cost will be very high  (e) theroretically possible.

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Last Answer : Answer : b

An ideal gas as compared to a real gas at very high pressure occupies  (a) more volume  (b) less volume  (c) same volume  (d) unpredictable behaviour  (e) no such correlation.

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Brayton cycle consists’ of following four processes  (a) two isothermals and two isentropics  (b) two isentropics and two constant volumes  (c) two isentropics, one constant volume and one constant pressure  (d) two isentropics and two constant pres-sures  (e) none of the above.

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Last Answer : Answer : d

Diesel cycle consists of following four processes  (a) two isothermals and two isentropics  (b) two isentropics, and two constant volumes.  (c) two isentropics, one constant volume and one constant pressure  (d) two isentropics and two constant pressures  (e) none of the above.

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Last Answer : Answer : c

Otto cycle consists of following four processes  (a) two isothermals and two isentropics  (b) two isentropics and two constant volumes  (c) two isentropics, one constant volume and one constant pressure  (d) two isentropics and two constant pres-sures  (e) none of the above.

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Last Answer : Answer : b

A cylinder contains oxygen at a pressure of 10 atm and a temperature of 300 K. The volume of the cylinder is 10 liters. What is the mass of the oxygen in grams? Molecular weight (MW) of oxygen is 32 g/mole?  a. 125.02  b. 130.08  c. 135.05  d. 120.04

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Last Answer : 130.08 {(10atm)(10)(32)/(0.0821) (300K)}

For a body cooling in a draft, the rate of heat loss is proportional to the difference in temperature between the body and its surroundings.  a. Nemst Effect  b. Caloric Theory  c. Joule’s Law  d. Newton’s Law of Cooling

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The radiation emitted by a body as a result of its temperature.  a. Blackbody Radiation  b. Thermal Inversion  c. Thermionic Inversion  d. Thermal Radiation

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