The voltage applied to a transformer primary is increased keeping V/f constant. With this, the core loss ____ and the magnetizing current (Im) ____ remains constant, decreases decreases, increases increases, remains constant increases, increases TRUE ANSWER : ? YOUR ANSWER : ?
A three-phase, 4-pole, 50 Hz induction motor runs at 1425 rpm. Find out the percentage slip of the induction motor. 5% 3% 4% 6% TRUE ANSWER : ? YOUR ANSWER : ?
A 3-phase motor load has a p.f. of 0.397 lagging. The two wattmeter method used to measure power show the input as 30 kW. Find the reading on each wattmeter. W1 = 5 kW and W2 = 25 kW W1 = 10 kW and W2 = 20 kW W1 = -5 kW and W2 = 35 kW W1 = -10 kW and W2 = 40 kW TRUE ANSWER : ? YOUR ANSWER : ?
Thermocouples can be connected in series/parallel to obtain greater sensitivity called as Thermistor Thermopile None of these Thermometer TRUE ANSWER : ? YOUR ANSWER : ?
A circuit breaker is rated 2500 A, 2000 MVA, 33 kV, 3 sec, 3-phase oil circuit breaker. Determine the breaking current. 350 kA 35 kA 25 kA 2500 A TRUE ANSWER : ? YOUR ANSWER : ?
The wind speed increases with height because of reduction in the gravitational force reduction of drag effect of the earth surface enhancement of drag effect on the earth surface reduction in lift effect of the air TRUE ANSWER : ? YOUR ANSWER : ?
Recently, India and Benin signed MoUs on education, health and ____ Trading Against Corruption e-visa facilities Defence TRUE ANSWER : ? YOUR ANSWER : ?
A MOSFET rated for 15 A, carries a periodic current as shown in figure. The ON state resistance of the MOSFET is 0.15 Ω. The average ON state loss in the MOSFET is 7.5 W 3.8 W 33.8 W 15 W TRUE ANSWER : ? YOUR ANSWER : ?
Magnetic tape is not practical for applications where data must be quickly recalled because tape is a/an____. None of these Random access medium Sequential access medium expensive storage medium TRUE ANSWER : ? YOUR ANSWER : ?