The characteristics of drive for crane hoisting and lowering are which of the following ?
A. Precise control
B. Smooth movement
C. Fast speed control
D. All of the above
A. Precise control
B. Smooth movement
C. Fast speed control
D. All of the above
A. OR gates
B. NOT gates
C. NAND gates
D. None of the above
A. paper mills
B. steel mills
C. moist atmospheres
D. explosive atmospheres
Which of the following are the passive elements?
A. Resistor
B. Bulb
C. Both
D. None of these.
When the element is not capable of delivering energy independently, are called as passive element. Both resistor and bulb are the passive elements and they can’t increase the energy level of a circuit
A. RC coupling
B. Transformer coupling
C. Direct coupling
D. Impedance coupling
A. up to 1500
B. 1500 to 2000
C. 2000 to 3000
D. 3000 to 4000
A. High efficiency operation
B. Reversibility
C. Variable speed drive
D. High starting torque