6. What kind of pumps is applying the action of piston to force the liquid?
(A) Screw pumps
(B) Gear pumps
(C) Reciprocating pump
(D) Centrifugal pumps
7. Watch out for the slipping steps on the ground in Purifier Room, or you might fall and
__________ .
(A) hurt
(B) hurt you
(C) feel hurt
(D) hurt yourself
20. The ___________ that controls the output of generator adjusts the current feeding into a
small winding on the brushless exciter.
(A) voltage regulator
(B) rectifier
(C) transformer
(D) potentiometer
22. ________ is a device for separating different materials by means of an outward force on a
body rotating about an axis within the unit.
(A) purifier
(B) generator
(C) strainetr
(D) Homogenizer
24. I can tell you the actual internal____________ of a pipe depends upon the pipe standard
and schedule being used.
(A) density
(B) color
(C) diameter
(D) conduction
27. The main function of the intercooler of a multistage air compressor is what?
(A) to increase the enthalpy of working fluids
(B) to increase the entropy of working fluids
(C) to reduce the specific volume of working fluids
(D) to increase the internal energy of working fluids
36. What is the main function of labyrinth packing in a steam turbine engine?
(A) To improve dynamic balance
(B) To increase critical speed
(C) To reduce vibration
(D) To minimize leakage of working fluid