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WorksheetsCONCEPTS OF THERMODYNAMICS
Total questions: 15
Worksheet time: 30mins
One kg of diatomic Oxygen is present in a 500 L tank. Find the specific volume on both mass and mole basis.
0.6 m3/kg , 0.260 m3/mole
0.5 m3/kg , 0.0160 m3/mole
0.56 m3/kg , 0.0215 m3/mole
0.7 m3/kg , 0.0325 m3/mole
A piston/cylinder with a cross-sectional area of 0.01 m2 is resting on the stops. With an outside pressure of 100 kPa, what should be the water pressure to lift the piston?
178kPa
188kPa
198kPa
208kPa
A large exhaust fan in a lab room keeps the pressure inside at 10 cm water relative vacuum to the hallway? What is the net force acting on the door measuring 1.9 m by 1.1 m?
2020 N
2030 N
2040 N
2050 N
A 5 m long vertical tube having cross sectional area 200 cm2 is placed in a water. It is filled with 15°C water, with the bottom closed and the top open to 100 kPa atmosphere. How much water is present in tube?
99.9 kg
109.9 kg
89.9 kg
79.9 kg
A 5 m long vertical tube having cross sectional area 200 cm2 is placed in a water. It is filled with 15°C water, with the bottom closed and the top open to 100 kPa atmosphere. What is the pressure at the bottom of tube ?
119 kPa
129 kPa
139 kPa
149 kPa
Find the pressure of water at 200°C and having specific volume of 1.5 m3/kg.
0.9578 m3/kg
0.8578 m3/kg
0.7578 m3/kg
0.6578 m3/kg
Find the pressure of water at 200°C and having specific volume of 1.5 m3/kg.
141.6 kPa
111.6 kPa
121.6 kPa
161.6 kPa
A 5m3 container is filled with 840 kg of granite (density is 2400 kg/m3) and the rest of the volume is air (density is 1.15 kg/m3). Find the mass of air present in the container.
9.3475 kg
8.3475 kg
6.3475 kg
5.3475 kg
A 100 m tall building receives superheated steam at 200 kPa at ground and leaves saturated vapour from the top at 125 kPa by losing 110 kJ/kg of heat. What should be the minimum inlet temperature at the ground of the building so that no steam will condense inside the pipe at steady state?
363.54°C
263.54°C
163.54°C
none of the mentioned
The pressure gauge on an air tank shows 60 kPa when the diver is 8 m down in the ocean. At what depth will the gauge pressure be zero?
34.118 m
24.118 m
14.118 m
none of the mentioned
A piston-cylinder device initially contains air at 150 kPa and 27°C. At this state, the volume is 400 litre. The mass of the piston is such that a 350 kPa pressure is required to move it. The air is now heated until its volume has doubled. Determine the final temperature.
1400 K
400 K
500 K
1500 K
A piston-cylinder device initially contains air at 150 kPa and 27°C. At this state, the volume is 400 litre. The mass of the piston is such that a 350 kPa pressure is required to move it. The air is now heated until its volume has doubled. Determine work done by the air.
120 kJ
130 kJ
100 kJ
140 kJ
When a body A is in thermal equilibrium with a body B, and also separately with a body C, then B and C will be in thermal equilibrium with each other.
True
False
Which of the following were used as fixed points before 1954?
The ice point
The steam point
All of the mentioned
None of the mentioned
What is the standard fixed point of thermometry?
The ice point
The steam point
The triple point of water
None of the mentioned
