Computer Programming MCQs

A. The rotor excitation only
B. The supply voltage only
C. The rotor excitation and supply volt-age both
D. The rotor excitation, supply voltage and maximum value of coupling angle (90°)

A. When under loaded
B. While over-excited
C. Only at synchronous speed
D. Below or above synchronous speed

A. Frequencies above 20 khz
B. Frequencies above 1000 khz
C. Frequencies less than 10 hz
D. 50 hz frequency

A. Load survey method
B. Mathematical method
C. Statistical method
D. Economic parameters

A. It will rotate at the same speed as that with its field winding closed
B. It will rotate at less speed as that with its field winding closed
C. It will rotate at dangerously high speed
D. None of these

A. Electrical power developed in armature – copper losses
B. Mechanical power input – iron and friction losses
C. Electrical power developed in armature – iron and copper losses
D. Mechanical power input – iron and friction losses – copper losses

A. Duty ratio only
B. Frequency only
C. Duty ratio and frequency
D. Duty ratio, frequency and time delay

A. Two scr’s in parallel opposition
B. Two scr’s in series
C. Three scr’s in series
D. Four scr’s in series

A. silicon has large leakage current than germanium
B. silicon has small leakage current than germanium
C. silicon has small leakage voltage than germanium
D. silicon has large leakage voltage than germanium

A. Suppressing emissions
B. Reducing the efficiency of the coupling path
C. Reducing the susceptibility of the receptor
D. All of these