1091. In rotating electrical machines, the insulation temperature limit for class B type is:

A. 105 Degree centigrade
B. 130 Degree centigrade *
C. 150 Degree centigrade
D. 180 Degree centigrade

1092. For a specific engine, the cooling time consistent is typically :

A. Smaller than the heating time constant
B. Greater than the heating time constant *
C. Equal to the heating time constant
D. None of them

1093. For a specific sort of engine, the warming time steady :

A. Increase with the increase in size *
B. Decrease with the increase in size
C. Same of all sizes
D. None of them

1094. For assessment of force rating of an electric drive, its misfortunes can be considered to the relative to :

A. Power
B. (Power)2 *
C. (Power)3
D. Torque

1095. The duty cycle of a motor is :

Load Duration
20KW 120S
10KW 120s
Stooped 280s

The consistent rating of engine reasonable for above application would be :

A. 20 KW
B. 16.4 KW
C. 14.14 KW *
D. 9.0 KW

1096. The beating time constant of totally enclosed motor is relatively :

A. Lower
B. Higher *
C. Independent of type of enclosure
D. None of them

1097. For a specific modern application and misrepresented ac engine was chosen . It will prompt activity with :

A. Higher efficiency and better PF
B. Lower efficiency and poorer PF *
C. Higher efficiency and poorer PF
D. Lower efficiency and better Pf

1098. A flywheel is generally used in :

A. A cement mill drive
B. A paper mill drive
C. A rolling mill drive *
D. A sugar centrifuge drive

1099. In overhead travelling cranes :

A. Continous rating motors are used
B. Continous minimum rating motors are used
C. Short-time rating motors are used *
D. Any of the above

1100. 15 Minute rated motors are suitable for :

A. Light duty cranes *
B. Medium duty cranes
C. Heavy duty cranes
D. All of the above