1. Find out the incorrect statement
a) ∆˚F = ∆˚R and ∆˚C = ∆˚K
b) ∆˚C = 1.8 ∆˚F and ∆˚K = 1.8∆˚F
c) Both a and b are correct
d) Both a and b are incorrect
Explanation: Both a) and b) are correct for these units of temperatures.
2. Find out the correct statement: 200˚C is equal to
a) 273 K
b) 292 ˚F
c) 852 ˚R
d) None of the mentioned
Explanation: ∆˚F = ∆˚R, ∆˚C = ∆˚K, ∆˚C = 1.8 ∆˚F and ∆˚K = 1.8∆˚F.
3. Heat capacity function for a liquid is given as
Heat capacity = 311.4 + 0.128 T, where temperature (T) is expressed in ˚C.
What is the relation of temperature with heat capacity if the temperature is expressed in terms of ˚R?
a) Heat capacity = 76.4 + 0.070˚R
b) Heat capacity = 176.4 + 0.070˚R
c) Heat capacity = 276.4 + 0.071˚R
d) Heat capacity = 376.4 + 0.071˚R
Explanation: ˚C = (˚R – 460 – 32)/1.8.
4. The relation of heat capacity with temperature for oxygen is given as
Cp = 22.5 + 2.56 T, where Cp is in J/g.mol.˚C.
What is the expression for heat capacity if the temperature is expressed in ˚R and Cp in Btu / lb.mole.˚R?
a) -161.9 + 0.339 ˚R
b) -151.9 + 0.229 ˚R
c) -141.9 + 0.119 ˚R
d) None of the mentioned
Explanation: ˚C = (˚R – 460 – 32)/1.8 and 1 Btu = 1055 Jule.
5. Boiling temperature of water in Fahrenheit scale is
a) 112
b) 213
c) 212
d) 121
Explanation: Boiling temperature of water is 100 ˚C.
6. Temperature can`t be expressed as?
a) Celsius
b) Fahrenheit
c) Rankine
d) None of the mentioned
Explanation: All a, b, c are the units of temperature.
7. The smallest temperature is
a) 25 degree Celsius
b) 250 degree Fahrenheit
c) 560 degree Rankine
d) 400 Kelvin
Explanation: ∆˚C = 1.8 ∆˚F and ∆˚K = 1.8∆˚F.
8. Temperature of a body is raised 25 ˚C by external heating. Change in temperature on Kelvin scale is?
a) 25 K
b) 298 K
c) 398 K
d) None of the mentioned
Explanation: ∆˚C = ∆˚K.
9. Temperature of a body is raised 25 ˚C by external heating. Change in temperature on Fahrenheit scale is?
a) 1.389 ˚F
b) 37.72˚F
c) 460 ˚F
d) None of the mentioned
Explanation: ∆˚C = 1.8 ∆˚F.
10. Temperature of a body is raised 25 ˚C by external heating. Change in temperature on Rankine scale is?
a) 1.389 ˚F
b) 37.72˚F
c) 460 ˚F
d) None of the mentioned
Explanation: ∆˚F = ∆˚R.