Recent questions tagged rating

Description : Where would you rate Ronald Reagan among US Presidents?

Last Answer : I think the “fat little dutchman” did good, made me laugh on numerous occasions.

Description : On a scale from 0 to 10, how do you rate the numbers in that scale?

Last Answer : 1: 1 2: 2 3: 3 4: 4 5: 7 6: 5 7: 6 8: 10 9: 8 10: 9

Description : How rating of main switch and cable is selected for Industrial Installation.

Last Answer : 1. Rating of Main Switch or Fuse Rating is decided in industrial installation: Rating of main switch or fuse is based up the starting current of motor. For calculating starting current is considered 2 ... take 1.5 times the rated current or full load current. & thus cable rating is decided.

Description : Why Transformer rating is given in kVA?

Last Answer : Because of core losses and iron losses as core losses are measured in amps and cu losses in voltage ....this is definatly reason for the rating Or kVA is the unit for apparent power. Apparent ... shift between voltage and current). So a transformer has to be rated (and selected) by apparent power.

Description : Define kVA rating of transformer.

Last Answer : kVA rating of transformer is defined as the product of voltage (V) and current (I) on primary side of transformer or secondary side of transformer divided by 1000. On both side the VA rating remains ... Mathematically kVA rating is given by, kVA rating of transformer = V1I1/1000 =V2I2/1000

Description : The rating of transformer may be expressed in ____________.  (A) kVAR (B) kW (C) kVA (D) Horse power

Last Answer : The rating of transformer may be expressed in kVA . 

Description : The kVA rating of Three-phase transformer with Voltage = 200V and Current = 100A will be :  (A) 34.64 kVA (B) 75 kVA (C) 20 kVA (D) None of the above

Last Answer : The kVA rating of Three-phase transformer with Voltage = 200V and Current = 100A will be : 34.64 kVA

Description : Boiler rating is usually defined in terms of  (1) Maximum temperature of steam in Kelvin (2) Heat transfer rate in KJ/hr (3) Heat transfer area in metre2 (4) Steam output in kg/hr

Last Answer : Boiler rating is usually defined in terms of Steam output in kg/hr

Last Answer : For the same H.P. rating and full load speed, following motor has poor starting torque differentially compounded.

Last Answer : The wattage rating for a ceiling fan motor will be in the range 50 to 150 W .

Last Answer : The fuse rating is expressed in terms of current.

Last Answer : The transformer ratings are usually expressed in terms of kVA.