C:-2° pi FC
D:-* (1)/(2piFC)*
Correct Answer:- Option-D
Question59:-The power factor of a purely resistive circuit is :
A:-Zero
B:-Unity
C:-Leading
D:-Lagging
Correct Answer:- Option-B
Question60:-In star connection line current ` =` ` `
A:-Phase current
B:-V3 Phase current
C:-v2 Phase current
D:-None of the above
Correct Answer:- Option-A
Question61:-Power transformers are designed to have maximum efficiency at :
A:-Half load
B:-No load
C:-Little more than full load
D:-Near full load
Correct Answer:- Option-D
Question62:-1 litre of water
A:-980 gm
B:-1000 gm
C:-930 gm
D:-910 gm
Correct Answer:- Option-B
Question63:-Melting point of copper is
A:-1230°C
B:-1085°C
C:-1088°C
D:-1083°C
Correct Answer:- Option-D
Question64:-In H.S.S. 18 : 4 : 1 Means
A:-Tungsten : Vanadium : Chromium
B:-Tungsten : Chromium : Vanadium
C:-Vanadium : Tungsten : Chromium
D:-Chromium : Vanadium : Tungsten
Correct Answer:- Option-B
Question65:-Which colour wire is recommended for earth connection as per ISI Code ?
A:-Red
B:-Black
C:-Blue
D:-Green
Correct Answer:- Option-D
Question66:-What is the value of cos 0° ?
‏ا‎
‎B:-0
‎(:-४2
‎0:-/3
‎Correct Answer:- Option-A
Question67:-On which factors the frequency depends ?
A:-Directly proportional to speed and no. of poles
B:-Inversely proportional to speed and no. of poles
C:-Directly proportional to back emf
D:-Directly proportional to applied voltage and back emf
Correct Answer:- Option-A
Question68:-What is the complete formula for frequency ?
A:- F=(PxxN)/(60)*