ME 200 Exam 1 Questions & Answers (Grade A+).docx

ME 200 Exam 1 Questions & Answers
(Grade A+)
For a substance near saturation dome (on either side of it/under it),
phase can always be determined knowing pressure and
temperature. (True or False) -
correct answer ✅False


For a substance near saturation dome (on either side of it/under it),
phase can always be determined knowing pressure and specific
volume. (True or False) -
correct answer ✅True


At critical point, the specific internal energy of saturated liquid is
equal to specific internal energy of saturated vapor. (True or False) -
correct answer ✅True


A constant mass system, having negligible changes in KE and PE, is
supplied with 20 kJ of work and heat transfer of 50 kJ occurs from
the system to surroundings. Does the energy of the system
(Decrease or Increase or Remain the same)? -
correct answer ✅Energy Decreases


A closed, rigid tank contains a saturated liquid-vapor mixture (V <
Vcritical). When the tank is heated to a pressure below critical
pressure, the possible final phase(s) is/are (Saturated liquid-vapor

, ME 200 Exam 1 Questions & Answers
(Grade A+)
mixture, Saturated liquid, Saturated vapor, Compressed liquid,
Superheated vapor). -
correct answer ✅Saturated liquid-vapor mixture, Saturated liquid,
or Compressed liquid


Consider a lightbulb powered by electricity. Assume positive sign
for heat transfer into the system and for work output from the
system. which of the following is true considering lightbulb as the
system?
W > 0, Q > 0
W > 0, Q < 0
W < 0, Q < 0
W < 0, Q > 0 -
correct answer ✅W < 0, Q < 0


Which of the following is (are) true for a fixed state containing only
vapor?
T < Tsat
T > Tsat
P < Psat
P > Psat -
correct answer ✅T > Tsat