(A) top side of main ()
(B) bottom side of main (X)
(C) left side of main (X)
(D) right side of main (X)
(E) any location (X)
Answers: To avoid moisture troubles, the branch connections from compressed air lines should be taken from top side of main.
(A) rise gradually towards the point of use (X)
(B) drop gradually towards the point of use ()
(C) be laid vertically (X)
(D) be laid exactly horizontally (X)
(E) none of the above (X)
Answers: To aviod moisture troubles, the compressed air main line should drop gradually towards the point of use.
(A) less (X)
(B) more ()
(C) same (X)
(D) more/less depending on compressor capacity (X)
(E) unpredictable (X)
Answers: The area of actual indicator diagram on an air compressor as compared to area of ideal indicator diagram is more.
(A) radial component (X)
(B) axial component ()
(C) tangential component (X)
(D) resultant component (X)
Answers: The thrust on the rotor in a centrifugal compressor is produced by axial component.
(A) more power (X)
(B) less power ()
(C) same power (X)
(D) more/less power depending on other factors (X)
(E) none of the above (X)
Answers: A compressor at high altitude will draw less power.
(A) conversion of pressure energy into kinetic energy (X)
(B) conversion of kinetic energy into pres¬sure energy ()
(C) centripetal action (X)
(D) generating pressure directly (X)
(E) combination of A. and D. (X)
Answers: A centrifugal compressor works on the principle of_conversion of kinetic energy into pres¬sure energy.