Question Paper from: Railway RRB ALP Stage - II (Paper - I)

A machine having an efficiency less than 50% is known as

1:

reversible machine 

2:

non-reversible machine

3:

neither (1) nor (2)

4:

ideal machine

Solution:
Chapter Name: Science

This has been asked in Question Paper

Railway RRB ALP Stage - II (Paper - I)

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