AMIE INDIA Students Forum

[shashi118]

Multiple Choice Questions’ Bank:
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
11. With increase in temperature, thermal conductivity of a metal _____________.
(a) Increases (b) Decreases (c) Either (d) All, depending on metal.
12. Thermal conductivity in polymers increases with ________.
(a) Increase in crystallinity (b) Decrease in crystallinity (c) Either (d) None
Answers:
1. c
2. b
3. d
4. c
5. d
6. a
7. d
8. a
9. d
10. c
11. d
12. a