A. solid
B. hollow
C. perforated
D. any ofthe above
A. 10 Q m
B. 100 Q m
C. 1000 Q m
D. 2000 Q m
The resistivity of water should not be less than_____________? Read More »
Electrical Machine Design A. “supercharged”
B. “inner cooled”
C. “conductor cooled”
D. any of the above
Machines cooled by direct cooling method may be called_____________? Read More »
Electrical Machine Design A. 0.07
B. 1.5
C. 2.5
D. 3.5
The density of hydrogen is __________ times the density of air? Read More »
Electrical Machine Design A. Increase in efficiency
B. Increase in ratings
C. Increase in life
D. Smaller size of coolers
E. All of the above
Which of the following is an advantage of hydrogen cooling ? Read More »
Electrical Machine Design A. Conduction
B. Convection
C. Radiation
D. All of the above
A. air
B. hydrogen
C. either A. or B.
D. none of the above
A. 2
B. 3
C. 5
D. 7
The thermal conductivity of hydrogen is _____________ times that of air? Read More »
Electrical Machine Design A. Direct
B. Indirect
C. Conventional
D. Any of the above
A. 50 MW
B. 100 MW
C. 200 MW
D. none of the above
