A <u>centrifugal switch</u> is used commonly in open split-phase motors to disconnect the start winding from the electrical circuit when the motor reaches approximately 75% of its rated speed.
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Answer:
135 hour
Explanation:
It is given that a carburizing heat treatment of 15 hour will raise the carbon concentration by 0.35 wt% at a point of 2 mm from the surface.
We have to find the time necessary to achieve the same concentration at a 6 mm position.
we know that
where x is distance and t is time .As the temperature is constant so D will be also constant
So
then
we have given
and we have to find
putting all these value in equation

so
Answer:
the evaluation in SI unit will be
Explanation:
We have evaluate 
We know that 1 mm 
So 240 mm 
Newton can be written as 
So 
So the evaluation in SI unit will be
Answer
63 %
Explanation:
It is given that the reservoirs is at the temperature of 627°C and 27°C
So lower temperature that is
= 60°C=273+60=333 K
And the higher temperature that is
= 627°C =273+627=900 K
We know that the thermal efficiency of thermal reservoir = 1-
=
= 0.63 =63 %
So the efficiency of the reservoir is 63%