Consider the Boolean expression X = ABCD + ABCD + ABCD + ACBD The simplified form of X is
A 500 kW, 3-phase, 440 volts, 50 Hz, A.C. induction motor has a speed of 960 r.p.m. on full load. The machine has 6 poles. The slip of the machine will be
Braking retardation on suburban trains is
For supply on 25 kV, 50 Hz single phase, suitable motor for electric traction is
Speed of locomotive is controlled by
The specific energy consumption for suburban services is usually
A zero watt lamp consumes
The method on the result set that tests whether or not there remains at least one unfetched tuple in the result set, is said to be
If the specific energy consumption for suburban services is 50 to 75 watts hours per tonne km, which of the following could be a representative figure for energy consumption on main line service
The coasting retardation on trains is approximately
Electro-mechanical breakdown of solid insulating materials occurs due to
A schedule speed of 45 km, per hour is required between two stops 1.5 km apart. The duration of stop is 20 seconds. The acceleration is 2.4 km phps and retardation is 3.2 km phps. For a simplified trapezoidal curve the maximum speed over the mil will be
The acceleration rate of trains on suburban services is
For 50 Hz system the maximum speed of an alternator can be