For harnessing low variable water heads, the suitable hydraulic turbine with reaction and adjustable vanes runners is Pelton Impeller Francis Kaplan TRUE ANSWER : ? YOUR ANSWER : ?
Critical disruptive voltage is a voltage at which corona is just initiated nether 1 nor 2 corona is visible with blue or violet colour both 1 and 2 TRUE ANSWER : ? YOUR ANSWER : ?
A string type insulator has three units with self capacitance C and ground capacitance of 0.2 C having a string efficiency of 78% 80% 82% 76% TRUE ANSWER : ? YOUR ANSWER : ?
In an induction relay for a particular current setting the operating time 4 sec. When the time multiplier setting is 0.8 if the time multiplier setting is rest to 1 the operating time is 1. 10. un changed. 5. TRUE ANSWER : ? YOUR ANSWER : ?
The rating of fuse wire is always expressed in amperes. ampere-volts. kWh. ampere-hours. TRUE ANSWER : ? YOUR ANSWER : ?
To prevent maloperation of deferentially connected relay while energizing a transformer, the relay restraining coil is biased with 2nd harmonic current. 3rd harmonic current. 7th harmonic current. 5th harmonic current. TRUE ANSWER : ? YOUR ANSWER : ?
Ferranti effect occurs under full load half load any of the above no load TRUE ANSWER : ? YOUR ANSWER : ?
The sequence components of the fault current are as follows : Ipositive = j1.5 pu, Inegative = − j0.5 pu, Izero = − j pu Which fault is this? LG. LL. LLLG. LLG. TRUE ANSWER : ? YOUR ANSWER : ?
A 200 MVA alternator operated at no load at frequency of 50 Hz, it has inertia constant of 5 MWsec/MVA and governing system has a time delay of 0.6 sec. If the load of 50 MW is suddenly applied then find the frequency deviation during this time? -0.76 Hz 0.76 Hz 0.85 Hz -0.85 Hz TRUE ANSWER : ? YOUR ANSWER : ?