Engineering :: Thermodynamics
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41. |
For an ideal gas Charles law deals with the relationship between |
A. |
pressure and volume at constant temperature |
B. |
pressure and temperature at constant volume |
C. |
volume and temperature at constant pressure |
D. |
mass and volume at constant temperature |
Answer: Option C
Explanation:
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42. |
Boyles law for an ideal gas deals with the relationship between |
A. |
mass and volume at constant temperature |
B. |
pressure and volume at constant temperature |
C. |
volume and temperature at constant pressure |
D. |
pressure and temperature at constant volume |
Answer: Option B
Explanation:
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43. |
A gas is termed an ideal gas if it obeys the gas equation PV = RT. When do you expect a gas to show deviation from ideality? |
A. |
At high poressures and low temperatures |
B. |
At low poressures and low temperatures |
C. |
At high poressures and high temperatures |
D. |
At low poressures and high temperatures |
Answer: Option A
Explanation:
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44. |
Under which of the following conditions is the law PV = RT obeyed most closely by a real gas? |
A. |
High pressure and high temperature |
B. |
Low pressure and low temperature |
C. |
High pressure and low temperature |
D. |
Low pressure and high temperature |
Answer: Option D
Explanation:
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45. |
For an ideal gas x in the equation PV = xT is a constant which depands upon |
A. |
the number of molecules present only |
B. |
the type of gas only |
C. |
both (a) and (b) |
D. |
neighter (a) nor (b) |
Answer: Option A
Explanation:
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46. |
Which of the following nethods will enable the volume of an ideal gas to be made four times greater? Use absolute temperature |
A. |
Double the temperature double the pressure |
B. |
Halve the temperature double the pressure |
C. |
Quarter the pressure at constant temperature |
D. |
Quarter the temperature at constant pressure |
Answer: Option C
Explanation:
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47. |
To double the volume of a given mass of an ideal gas at 27?C keeping the pressure constant one must raise the temperature to |
Answer: Option C
Explanation:
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48. |
Which one of the following plots for a gas at about room temperature will suggest an absolute zero temperature if extrapolated suitably? |
A. |
Pressure against 1/volume (temperature constant) |
B. |
Pressure against volume (temperature constant) |
C. |
Volume against temperature (pressure constant) |
D. |
Volume against 1/pressure (temperature constant) |
Answer: Option A
Explanation:
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49. |
The volume of an ideal gas is 100 cm3 at 100?C. If the pressure is held constant at what temperature will the gas have a volume of 200 cm3? |
Answer: Option B
Explanation:
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50. |
Specific volume of a gas is |
A. |
the reciprocal of its density |
B. |
equal to its density |
C. |
directly proportional to pressure |
D. |
the volume of gas at S.T.P. |
Answer: Option A
Explanation:
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