1 ton is a unit defined for air conditioner.it is the heat
energy consumed by 1000kg(1 ton) ice at 0 degree tempreture
to melt in 24 hours. hence it the latent heat for 1 ton ice
to change its phase to water.

1 TR refers 1 Ton(US) of refrigeration capacity. It is the
heat required to melt 1 Ton (907. 185 kg) per day of ice at
0 Deg C to water at 0 Deg C. This is basically the latent
heat of fusion of ice.

Latent heat of fusion of ice @ 0 deg C = 80 Kcals / kg
For melting 907.185 Kg ice / day, the heat required is
72575 Kcals / day or 3024 Kcals / hr or 3.516 KJ / sec.

In a transformer, the hysteresis and eddy current losses
depend upon
1.load current
2.maximum flux density in core
3.type of lamination
4.supply frequency
The correct statements are
(a) 1 and 3 (b) 2 and 3
(c) 1 and 4 (d) 2 and 4