No heat enters or leaves the gas

The temperature of the gas changes

The change in internal energy is equal to the mechanical workdone

All of the above

**A thin mild steel wire is loaded by adding loads in equal increments till it breaks. The extensions…****For the same compression ratio, the efficiency of Diesel cycle is __________ Otto cycle.****The property of a material by virtue of which a body returns to its original, shape after removal of…****The change in the unit volume of a material under tension with increase in its Poisson's ratio will****One kg of carbon monoxide requires 4/7 kg of oxygen and produces****Strain is defined as the ratio of****If the slenderness ratio for a column is 100, then it is said to be a _________ column.****When a body is subjected to a direct tensile stress (σx) in one plane accompanied by a simple shear…****The atomic mass of oxygen is****Which of the following statement is wrong?****Petrol is distilled at****The oxygen atom is ________ times heavier than the hydrogen atom.****The property of a material which allows it to be drawn into a smaller section is called****The thermal efficiency of an ideal gas turbine plant is given by (where r = Pressure ratio)****The main cause for the irreversibility is****In the below figure, the stress corresponding to point D is****A molecule consisting of one atom is known as****The efficiency of Ericsson cycle is __________ Carnot cycle.****Volumetric strain for a rectangular specimen of length l, breadth b and thickness t subjected to a pull…****The maximum stress produced in a bar of tapering section is at****First law of thermodynamics deals with****In a prismatic member made of two materials so joined that they deform equally under axial stress, the…****One reversible heat engine operates between 1600 K and T2 K and another reversible heat engine operates…****When two bodies are in thermal equilibrium with a third body, they are also in thermal equilibrium with…****The value of modulus of elasticity for mild steel is of the order of****The expansion ratio (r) is the ratio of (where v1 = Volume at the beginning of expansion, and v2 = Volume…****A closely-coiled helical spring is cut into two halves. The stiffness of the resulting spring will be****The atomic mass of nitrogen is __________ oxygen.****The efficiency of a Carnot engine depends on****Efficiency of a riveted joint is the ratio of its strength (max. load it can resist without failure)…**