What are the materials used for brushes in dc machines?

1.	What are the materials used for brushes in dc machines?
A.	Iron
B.	Carbon
C.	Aluminum
D.	Steel
Answer» C. Aluminum

Discussion

No Comment Found

Related MCQs

The armature of DC motor is laminated to ____________
If a DC motor is connected to AC supply what will happen then?
In normal dc machines operating at full-load conditions, the most powerful electromagnet is _________
In a DC machine, rectification process is carried out in order to get unidirectional output (DC). This rectification process is carried out by ______________a) Half wave rectifierb) Full wave rectifierc) Mechanical rectificationd) Centre tapped rectifier 6.Which of the following part is used in construction of DC machine but not in AC machine?
In which organizational form would the project manager possess the greatest amount of authority?
Productivity performance variance is equal to:
During project staffing, the primary role of line management is
A tractor has a permissible loaded speed of 200 m/ minute, which can increase by 25% when the load is removed/deposited. Generally, it is operated at 80% of the permissible speed (loaded or unloaded). It works at a location where haul distance is 120 m. Rest allowance per round- trip is taken as 50 seconds on an average. Fixed time per trip, for loading and unloading and turnaround, etc., is 30 seconds. What is its effective cycle time?
A contractor agreed to build 30 temporary sheds in 90 days at a price of Rs. 10000/unit. Twenty days later, the contractor has finished 8 sheds with an actual total cost ofRs. 85000. What is the status of the project?
Consider the following statements:P. Walls of one brick thick are measured in square meters.Q. Walls of one brick thick are measured in cubic meters.R. No deduction in the brickwork quantity is made for openings in walls up to 0.1m2 area.S. For the measurement of excavation from the borrow pit in a fairly uniform ground, deadman are left at suitable intervals.For the above statements, the correct option is

What are the materials used for brushes in dc machines?

Discussion

No Comment Found

Related MCQs

Reply to Comment