Related Questions

In case of D.C. machine winding, number of commutator segments is equal to
A Number of armature coils
B Number of armature coil sides
C Number of armature conductors
D Number of armature turns
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
Width and depth of grooves in the tube sheet holes normally are __________ inch respectively.
A $$\frac{1}{8}$$ and $$\frac{1}{{64}}$$
B $$\frac{1}{{64}}$$ and $$\frac{1}{8}$$
C $$\frac{1}{2}$$ and 8
D $$\frac{1}{2}$$ and 5
The operation of producing grooves around the periphery of a cylindrical or conical workpiece is called
A Profile milling
B Gang milling
C Saw milling
D Helical milling
_______ brushes are fragile and cause excessive wear of commutator,
A Natural graphite
B Hard carbon
C Electro graphitic
D Metal graphite
The insulating material used between the commutator segments is normally
A Graphite
B Paper
C Mica
D Insulating varnish
For both lap and wave windings, there are as many commutator bars as the number of
A Slots
B Armature conductors
C Winding elements
D Poles

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