1) If a gas is heated against a pressure, keeping the volume constant, then work done will be equal a) Zero b) - ve c) + ve d) pressure x volume e) Anywhere between zero and infinity. 2) A closed system is defined in one of the following: a) mass crosses the boundary but not the energy. b) neither mass nor energy crosses the boundaries of the system. c) both energy and mass cross the boundaries of the system. d) mass does not cross boundaries of the system, though energy may do so thermodynamic reactions take place. 3) Which of the following is an equivalent change? а) 1K 3D 1°F b) 1°C = 1°F c) 1K = 1°C d) 1K = 1°Rankine e) 1°C = 1°Rankine 4) A piston cylinder contains air at 400 kPa, 300 K and a volume of 0.35m³. A constant pressure process gives 40 kJ of work out. Find the final volume of the air. a) 0.45 m3 b) 0.03 m³ c) 0.1 m3 d) 0.05 m³ 5) Change in enthalpy in a closed system is equal to heat transferred if the reversible process takes place at constant: a) pressure b) temperature c) volume d) internal energy e) entropy.

1) If a gas is heated against a pressure, keeping the volume constant, then work done will be equal a) Zero b) - ve c) + ve d) pressure x volume e) Anywhere between zero and infinity. 2) A closed system is defined in one of the following: a) mass crosses the boundary but not the energy. b) neither mass nor energy crosses the boundaries of the system. c) both energy and mass cross the boundaries of the system. d) mass does not cross boundaries of the system, though energy may do so thermodynamic reactions take place. 3) Which of the following is an equivalent change? а) 1K 3D 1°F b) 1°C = 1°F c) 1K = 1°C d) 1K = 1°Rankine e) 1°C = 1°Rankine 4) A piston cylinder contains air at 400 kPa, 300 K and a volume of 0.35m³. A constant pressure process gives 40 kJ of work out. Find the final volume of the air. a) 0.45 m3 b) 0.03 m³ c) 0.1 m3 d) 0.05 m³ 5) Change in enthalpy in a closed system is equal to heat transferred if the reversible process takes place at constant: a) pressure b) temperature c) volume d) internal energy e) entropy.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

A piston-cylinder assembly is in equilibrium with a volume of saturated liquid of 0.15 m³ and a volume of saturated steam of 0.85 m³ at a pressure of 700 kPa. Heat is transferred to the system until the water temperature reaches 300 ° C at constant pressure. A)The first heat of water? B)Total mass? C)Determine the volume at the end of the process.
Choose the correct statement a)There are only 2 types of energy transfer that can cross the boundary of the itself b)Specific volume shows mass per unit volume c)Mass and temperature are extensive properties d)Zeroth law of thermodynamics is the basis for pressure measuring devices e)None
The efficiency of a thermal machine cannot have a value of 1 because a) There is no apparent reason, it is simply because of the way the calculation is made. b) it is impossible for a system to carry out a process in which the result is to use work to absorb heat from a source at low temperature c) it is impossible for a system to carry out a process in which the result is to absorb heat from a source at high temperature and convert it into work. d) it is impossible for a system to carry out a process in which it returns to the initial state and the result is to absorb heat from a source at high temperature and convert it entirely into work.
2. If a system is subjected to a sudden non-periodic force, the answer shall be: a) Periodic b) Constant c) Transitory
Internal energy is equal to heat addition at a) constant pressure b) constant volume c) constant density d) constant temperature e) none
Solve correctly please. Two closed vessels of constant volume are connected by a valve. Container A contains 0.2 m' water at 400 kPa pressure and 80% dryness. In the B container, there is 0.5 m² of water at 200 kPa pressure and 250 °C. The valve opens and the water in the two containers becomes the same after a while. Assuming that the system has finally reached thermal equilibrium with the environment at 25 °C. a) Final pressure, b) Calculate the heat transfer during the phase change.
An office room has dimensions of 5x3x6 m. It is needed to ventilate the room air in 12 minutes. To prevent any disturbance to the occupants of the room, a smooth air flow with a velocity of 0.8 m/sec is desired. Determine the fan diameter for this purpose? a)54.6 cm b)44.6 cm c)64.6 cm d)34.6 cm e)24.6 cm
Which one of these is not extensive property? A)Enthalpy B)Potential energy C)Mass D)None of the given E)Volume
a)kinetic energy of the system b)total power of the forces acting upon the system c)differential equation of the system motion (using the body 1 motion at x direction) d) the law of the system motion (using the body 1 motion at x direction)
One kg of nitrogen contained in a cylinder at a pressure of 7bar and temperature of 300K expands 4 times of its original volume.The process of expansion is assumed to take place at constant pressure. Calculate a) Initial volume b) Final temperature c) Workdone d) Heat added. e) Change in internal energy. For nitrogen assume, Cp =1.045 kJ/kg K, R=0.296 kJ/kg K
16. Kilowatt-hour is the unit of а) power b) energy c) voltage d) current