Related Questions

The function of pole shoes in the case of D.C. machine is
A To reduce the reluctance of the magnetic path
B To spread out the flux to achieve uniform flux density
C To support the field coil
D To discharge all the above functions
In D.C. generators the pole shoes are fastened to the pole core by
A Rivets
B Counter sunk screws
C Brazing
D Welding
Eddy currents are induced in the pole shoes of a D.C. machine due to
A Oscillating magnetic field
B Pulsating magnetic flux
C Relative rotation between field and armature
D All above
How many cases do you need if you have to pack 112 pairs of shoes into cases that each hold 28 shoes ?
A 8
B 10
C 12
D 14
During a sale, the price of a pair of shoes is marked down by 10% from the regular price. After the sale ends, the price goes back to the original price. What is the percent increase (to the nearest whole number) form the discounted sale price to the regular price for the shoes?
A 9%
B 10%
C 11%
D 15%
There are 23 poles with a constant distance between each pole. A car takes 24 seconds to reach the 12th pole. How much more time will it take to reach the last pole?
A 40 seconds
B 44 seconds
C 48 seconds
D 46 seconds
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 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.
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
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

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