ENGINEERING CAREER AND STUDY MATERIALS

1. D.C. generator generally preferred for charging automobile batteries is (a) series generator (b) shunt generator (c) long shunt compound generator (d) any of'the above Ans: c 2. No-load current in a transformer (a) lags behind the voltage by about 75° (b) leads the voltage by about 75° (c) lags behind the voltage by about 15° (d) leads the voltage by about 15° Ans: a 3. Primary winding of a transformer (a) is always a low voltage winding (b) is always a high voltage winding (c) could either be a low voltage or high voltage winding (d) none of the above Ans: c 4. Power transformers are designed to have maximum efficiency at (a) nearly full load (b) 70% full load (c) 50% full load (d) no load Ans: a 5. In a transformer the tappings are generally provided on (a) primary side (b) secondary side (c) low voltage side (d) high voltage side Ans: c 6. Transmission voltage of llkV is normally used for distances upto (a) 20—25 km (b) 40—50 km (c)...

Question No. 1. Electric resistance seam welding uses __________ electrodes.  (A) Pointed (B) Disc.  (C) Flat (D) Domed Ans: B Question No. 2. Spring constant in force-voltage analogy is analogous to (a) capacitance (b) reciprocal of capacitance (c) current (d) resistance Ans: b Question No. 3. The frequency and time domain are related through which of the following? (a) Laplace Transform and Fourier Integral (b) Laplace Transform (c) Fourier Integral (d) Either (b) or (c) Ans: a Question No. 4. When the initial conditions of a system are specified to be zero it implies that the system is (a) at rest without any energy stored in it (b) working normally with reference input (c) working normally with zero reference input (d) at rest but stores energy Ans: d Question No. 5. The power of a n-phase circuit can be measured by using a minimum of (a) (n - 1) wattmeter elements (b) n wattmeter elements (c) (n + 1) wattmeter elements (d) 2n wattme...