1. One HP = [ b ]
(a) 756 watts
(b) 746 watts
(c) 860 watts
(d) 856 wats
Answer - (b) 746 watts
(a) HP x 33000 / (RPM x 2)
(b) HP x 2 / (RPM x 33000)
(b) HP x RPM / (2 x 33000)
(d) RPM x 2 / (HP x 33000)
Answer - (a) HP x 33000 / (RPM x 2)
(a) Watts/Volts
(b) Volts/Watts
(c) Kilowatt/Volts
(d) Kilovolt/watt
Answer - (a) Watts/Volts
4. Motor output in HP= [ a ]
(a) KW input x efficiency/0.746
(b) KW input x 0.746/efficiency
(c) Efficiency x 0.746/KW input
(d) 0.746/(KW input x efficiency)
Answer - (a) KW input x efficiency/0.746
5. kVA equal to [ d ]
(a) 1000 x Amps/ volts
(b) volts x Amps x 1000
(c) Volts x 1000/Amps
(d) Amps x volts/1000
Answer - (d) Amps x volts/1000
6. Power factor = [ a ]
(a) True Power/Apparent power
(b) Apparent power/True power
(c) Average power/True power
(d) Apparent power/Average power
Answer - (a) True Power/Apparent power
7. True power in three-phase circuit in Kilowatt is [ b ]
(a) 1.414 x volts x amperes x pf/1000
(b) 1.73 x volts x amperes x pf/1000
(c) Volts x Amperes x pf/1000
(d) Volts x Amperes x 1000/pf
Answer - (b) 1.73 x volts x amperes x pf/1000
8. Amperes drawn by single-phase motor are equal to [ c ]
(a) Efficiency x Volts x pf / (HP x 746)
(b) Efficiency x pf/(volt x HP x 746)
(c) HP x 746 / (Efficiency x volts x pf)
(d) HP x746 x volts/(Efficiency x pf)
Answer - (c) HP x 746 / (Efficiency x volts x pf)
9. Amperes drawn by three phase motor are equal to [ c ]
(a) Efficiency x Volts x pf / (HP x 746)
(b) Efficiency x pf/(volt x HP x 746)
(c) HP x 746/(Efficiency x volts x pf x 1.73)
(d) HP x 746 x volts/(Efficiency x pf)
Answer - (c) HP x 746/(Efficiency x volts x pf x 1.73)
10. One Kilowatt = [ a ]
(a) 1.314 HP
(b) 13.41 HP
(c) 134.1 HP
(d) 1341 HP
Answer - (a) 1.314 HP
11. One Kilowatt = [ d ]
(a) 1360 Metric HP
(b) 136 Metric HP
(c) 13.60 Metric HP
(d) 1.360 Metric HP
Answer - (d) 1.360 Metric HP
12. One Kwh = [ c ]
(a) 34.13 BTU
(b) 44.13 BTU
(c) 3.413 BTU
(d) 4.413 BTU
Answer - (c) 3.413 BTU
13. One Kwh = [ b ]
(a) 1000 calories
(b) 860 calories
(c) 740 calories
(d) 970 calories
Answer - (b) 860 calories
14. One BTU = [ a ]
(a) 0.2520 calories
(b) 2.520 calories
(c) 25.20 calories
(d) 252.0 calories
Answer - (a) 0.2520 calories
(a) 39.68 BTU
(b) 4.968 BTU
(c) 49.68 BTU
(d) 3.968 BTU
Answer - (d) 3.968 BTU
16. One foot pound = [ a ]
(a) 0.1383 M Kg
(b) 1.383 M Kg
(c) 13.83 M Kg
(d) 138.3 M Kg
Answer - (a) 0.1383 M Kg
17. One BTU = [ d ]
(a) 0.1076 M Kg
(b) 1.076 M Kg
(c) 10.76 M Kg
(d) 107.6 M Kg
Answer - (d) 107.6 M Kg
18. One Kilowatt = [ b ]
(a) 202 M Kg/sec
(b) 102 M Kg /sec
(c) 20.2 M Kg/sec
(d) 10.2 M Kg/sec
Answer - (b) 102 M Kg /sec
19. One Electrical Unit = [ a ]
(a) 1 Kwh
(b) 1 Kw
(c) 1 kVA
(d) Watt
Answer - (a) 1 Kwh
20. Power factor = [ a ]
(a) R/Z
(b) Z/R
(c) V/I
(d) I/V
Answer - (a) R/Z
21. The current rating of PVC insulated and PVC sheathed four core , armoured aluminium cable of size 120 sq mm (laid direct in ground) is approximately [ b ]
(a) 80 amps
(b) 185 amps
(c) 290 amps
(d) 320 amps
Answer - (b) 185 amps
22. The current rating of PVC insulated and PVC sheathed four core , armoured aluminium cable of size 70 sq mm (laid in duct) is approximately [ a ]
(a) 115 amps
(b) 210 amps
(c) 290 amps
(d) 350 amps
Answer - (a) 115 amps
(a) 65 amps
(b) 105 amps
(c) 200 amps
(d) 250 amps
Answer - (b) 105 amps
(a) 92 amps
(b) 160 amps
(c) 200 amps
(d) 250 amps
Answer - (a) 92 amps
(a) 55 amps
(b) 76 amps
(c) 90 amps
(d) 150 amp
Answer - (b) 76 amps
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