Material Science - Thermal Properties

1. Find the wrong statement: Specific heat of a material ______________.

(a) Constant for a material 

(b) Heat capacity per unit mass

(c) Extrinsic property 

(d) Has units as J/kg-K.

2. Heat capacity has units as

(a) J/kg.K 

(b) J/mol.K 

(c) J.ohm/sec.K²

(d) W/m.K

3. Units for thermal conductivity

(a) J/kg.K 

(b) J/mol.K 

(c) J.ohm/sec.K²

(d) W/m.K

4. Lorentz constant has units as

(a) J/kg.K 

(b) J/mol.K 

(c) J.ohm/sec.K²

(d) W/m.K

5. Thermal expansion of a material has units as

(a) J/kg-K 

(b) J/mol-K 

(c) J.ohm/sec.K² 

(d) 1/°C

6. Polymers have thermal conductivities in the range of

(a) < 1 

(b) 1-10 

(c) 10-100 

(d) >100

7. Polymers have thermal expansion coefficients in the range of _____x10^-6.

(a) 0.5-15 

(b) 5-25 

(c) 25-50 

(d) 50-400

8. Coefficient of thermal expansion for ceramics is the range of _______x10^-6.

(a) 0.5-15 

(b) 5-25 

(c) 25-50 

(d) 50-400

9. Metals have thermal conductivities in the range of

(a) < 1 

(b) 1-5 

(c) 5-25 

(d) 20-400

10. Heat capacity of most materials is approximately equal to ________.

(a) R 

(b) 2R 

(c) 3R 

(d) R/2

Answers

    1. c    2. b    3. d    4. c    5. d

    6. a    7. d    8. a    9. d    10. c