Commercial available medium size machines have a speed range of ______ . (a) 200 to 400 r.p.m. (b) 600 to 1000 r.p.m. (c) 1000 to 1500 r.p.m. (d) 2000 to 2500 r.p.m.

Commercial available medium size machines have a speed range of ______ . (a) 200 to 400 r.p.m.
(b) 600 to 1000 r.p.m.
(c) 1000 to 1500 r.p.m.
(d) 2000 to 2500 r.p.m.
by

1 Answer

Answer :

(d) 2000 to 2500 r.p.m.
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Related questions

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Last Answer : (C) 1000 hrs.

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Last Answer : (d) between 25 to 35 mm

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Last Answer : (c) better ventilation

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Dummy coil should not be used in (a) small machines (b) large machines (c) either (a) or (b) (d) none of the above

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Multiple inlet system of air cooling of turbo-alternators can be used for machines of rating upto (a) 10 MW (b) 30 MW (c) 60 MW (d) 150 MW

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is universally used for windings of electrical machines because it is easily workable without any possibility of fracture. (a) Silver (b) Steel (c) Aluminium (d) Copper

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The action of electromagnetic machines can be related to which ofthe following basic principles ? (a) Induction (b) Interaction (c) Alignment (d) All of the above

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Last Answer : (d) All of the above

P and Q undertake to do a piece of job for Rs.1200. P alone can do it in 12 days while Q alone can do it in 16 days. With the help of R , they finish it in 6 days. Find the share of P,Q & R. a) 400,600,200 b) 200,400,600 c) 450,400,250 d) 600,450,150

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The standard audible capacity of a healthy human being as per World Health Organi-sation is in the range of - (1) 45-50 decibels (2) 200-250 decibels (3) 5-10 decibels (4) 2000-2500 decibels

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In a D.C. machine, the value of peripheral speed should not, normally, exceed (a) 10 m/s (b) 20 m/s (c) 30 m/s (d) 40 m/s

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Last Answer : (a) small capacity transformers