(1). Multiple choice, multiple-answer questions (21 points) (1a). Please circle
ID: 2993413 • Letter: #
Question
(1). Multiple choice, multiple-answer questions (21 points)
(1a). Please circle the derived dimensions (s) which involves more than one primary dimension:
(A) Area (B) Force (C) Energy (D) Length
(1b) Please circle the intensive properties
(A) Density
(B) Total mass
(C) Specific volume
(D) Total chemical energy of gasoline contained in car tank
(1c). Please circle the parameter(s) having a SI unit of m3 / kg ?
(A) Density
(B) Specific volume
(C) Specific weight
(D) Specific gravity
(1d). The atmospheric pressures at the peak and at the base of a mountain measured by a barometer is 90.0 kPa and 98.0 kPa, respectively. If the density of air is 1.15 kg/m3, the height of this mountain is closest to:
(A) 16 m
(B) 142 m
(C) 170 m
(D) 709 m
(1e). The main item used to distinguish the control volume and closed system is
(A) If the transfer of mass is involved
(B) If volume is constant
(C) If there is heat transfer
(D) If mass contained in system is constant
(1f) Please circle the statement(s) which is (are) always valid for control volume system
(A) The volume must be constant;
(B) The control volume system may have a moving boundary; (C)
Explanation / Answer
1. (A) Area ,(C) Energy
2 (A) Density .(C) Specific volume
3.(A) Density (B) Specific volume
4. (C) 170 m
5.a) If the transfer of mass is involved d) If mass contained in system is constant
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