Related Questions

Usually wide and sensitive speed control is desired in case of
A Centrifugal pumps
B Elevators
C Steel rolling mills
D Colliery winders
Which one of the following is not necessarily the advantage of D.C. motors over A.C. motors?
A Low cost
B Wide speed range
C Stability
D High starting torque
Which of the following motors is preferred when quick speed reversal is the main consideration?
A Squirrel cage induction motor
B Wound rotor induction motor
C Synchronous motor
D D.C. motor
Following motor is used where high starting torque and wide speed range control is required.
A Single phase capacitor start
B Induction motor
C Synchronous motor
D D.C. motor
For reactions in parallel viz A → P (desired product) and A → Q (unwanted product), if the order of the desired reaction is higher than that of the undesired reaction, a
A Batch reactor is preferred over a single CSTR for high yield
B Tubular reactor is preferred over a single CSTR for high yield
C Both A and B
D Single CSTR is the most suitable
Which of the following motors is preferred for tape-recorders?
A Shaded pole motor
B Hysteresis motor
C Two value capacitor motor
D Universal motor
Which of the following motors is preferred for traction work?
A Universal motor
B D.C. series motor
C Synchronous motor
D Three-phase induction motor
Which of the following motors are preferred for overhead traveling cranes?
A Slow speed motors
B Continuous duty motors
C Short time rated motors
D None of the above
For which of the following applications D.C. motors are still preferred?
A High efficiency operation
B Reversibility
C Variable speed drive
D High starting torque
Which of the following motors is preferred for boom hoist of a traveling crane?
A Single phase motor
B Synchronous motor
C A.slip ring motor
D Ward-Leonard controlled D.C. shunt motor

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