40.What is the temperature recorded by a common thermometer with a moistened wick placed around
the bulb and a stream of air passed over the wick?
(A)Moisture temperature
(B)Dry-bulb temperature
(C)Wet-bulb temperature
(D)Dew-point temperature
32.In a steam turbine engine, the is the energy required to spin the turbine backwards in the
atmosphere of exhaust steam.
(A)kinetic energy
(B)blade thermal energy
(C)pressure loss
(D)astern turbine loss
30.Magnetic bearings are used in applications where noise and vibration are important
considerations or where lubricants are not acceptable. Like the hydrostatic bearings they
do not require shaft rotation to generate bearing support forces. The rotor is floated in the
space and levitated by magnetic forces, which are generated within the bearing by
magnets. Therefore,
(A)the air is necessary to be used as the lubricant to provide the film pressure for magnetic
bearings.
(B)the air is necessary to be used as the lubricant to reduce the noise and vibration for
magnetic bearings.
(C)the shaft rotation is important for generating the supporting forces for the magnetic
bearings.
(D)the magnetic forces are generated in the magnetic bearing to support the load of
bearing.
35. For a diesel engine, which pressure is evaluated when the mean indicated pressure is
multiplied by the mechanical efficiency of the engine?
(A) Mean effective pressure
(B) Mean equilibrium pressure
(C) Maximum cycle pressure
(D) Maximum efficient pressure