75. A tong-tester in an instrument having a :
(A) current transformer
(B) potential transformer
(8 current transformer with an ammeter
(D) potential transformer with a voltmeter
76. A coolant is used for cooling the :
(ಗಿ) machine (B) job only
(C) cutting tool (D) hot chips
77, As compared to an amplifier, a transformer cannot. :
(ಗಿ) increase the output power
(B) increase the output voltage
(C) increase the output current
(D) per....
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