If the tension in the cable supporting an elevator is equal to the weight of the elevator, the elevator may be

a) going up with increasing speed 

b) going down with increasing speed 

c) going up with uniform speed 

d) going down with uniform speed

The tension in the cable will be equal to the weight of the elevator when the acceleration of the elevator is zero.

So when the elevator is going up with uniform speed and going down with uniform speed, the tension in the cable is equal to weight of the elevator.