Related Questions

In a single phase rotary converter the number of slip rings will be
A two
B three
C four
D six
A rotary converter combines the function of
A An induction motor and a D.C. generator
B A synchronous motor and a D.C. generator
C A D.series motor and a D.generator
D None of the above
A rotary converter in general construction and design, is more or less like
A a transformer
B an induction motor
C an alternator
D any 'C. machine
In a rotary converter armature currents are
A d.c. only
B a.c. only
C partly a.c. and partly d.c.
D none of the above
A rotary converter operates at a
A low power factor
B high power factor
C zero power factor
D none of the above
A machine P can print out one lakh books in 8 hours. Machine Q can print the same number of books in 10 hours while machine R can print them in 12 hours. All the machines are started at 9 A.M.While machine P is stopped at 11 A.M. and remaining two machines completed the work. Approximately at what at what time will the work time (to print one lakh books) be finished?
A 11.30 Am
B 12 Noon
C 12.30 Pm
D 11.35 am
A small factory with 3 machines has a job of stamping out a number of pan covers. The newest machine can do the job is 3 days, another machine can do it in 4 days, and the third machine can do it in 6 days. How many days will the factory take to do the job using all the machine?
A 1.333
B 4.333
C 6
D 13
A machine P can paint one lakh books in 8 hours; machine Q can print the same number of books in 10 hours while machine R can print them in 12 hours. All the machines started operating at 9 A. M. while machine P is stopped at 11 A. M. and the reamaining two machines completed the work. Approximately at what time will the work (to print one lakh books) be finished?
A 11:30 A. M
B 12:00 noon
C 12:30 P. M.
D 1:00 P. M.
Three years ago, a machine was bought for Tk 1,00,000. The installation cost was Tk 20,000. The machine was depreciated in a straight line method at 20% per year. At the end of the 3rd year, the machine was sold for Tk 46,000. What is the gain/loss from sale of this machine?
A gain of Tk 2,000
B gain of Tk 6.000
C loss of Tk 2,000
D loss of Tk 6,000
E None of these
If V, U and Vr represent the absolute velocity of fluid, velocity of blade, and relative velocity of fluid, and suffix ‘I’ and ‘o’ stand for entry and exit conditions, then in a rotary machine whose degree of reaction is unity
A Vi = Vo
B Vt > Vo
C U
D V = Uo

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