TANCET 2004(Questions from Question Paper for Year 2004)

 Q1 to Q10   


 Q11 to Q20






21. A coil of inductance 0.08H and Resistance 12Ω is connected in parallel with 120µF capacitor to 240V, 50Hz supply. The circuit phase angle is

A) 19.8^o

B) 18.9^o

C) 1.89^o

D) 1.68^o



22. In a 3 phase power measurement by two watt meter method if W₁ and W₂ are watt meter readings, the phase angle is given by

23. A first order thermometer with a time constant of 15 sec. is subjected to a step change from  30^o C to 80^o C at t=0. The instrument output at t=45sec is

A) 78.4^oC

B) 77.5^oC

C) 76^oC

D) 79^oC



24. A step up chopper has an input voltage of 220V and output voltage of 660V. If the non-conducting time of thyristor is 100µs, the pulse width of the output voltage is

A) 350µs

B) 200µs

C) 250µs

D) 300µs



25. The instruction that is not available in the 8085 processor is

A) MOV A,A

B) MOV C,C

C) MOV M,M

D) None of the above



26. In a converter circuit, due to source inductance, both incoming and outgoing SCRs conduct simultaneously for an angular period called as

A) Commutation angle

B) Conduction angle

C) Phase angle

D) Extinction angle



27.
The 'CMP B' indicates the following changes in the flag

A) The contents of A and B are changed

B) To contents of A and B are not changed and flags are not affected

C) Only flags are affected

D) None of the above



28. If b is the number of branches, n is number of nodes and l is number of independent loops in a graph, then according to the theorem of topology,

A) b = n + l + 1

B) b = n - l + 1

C) b = l - n + 1

D) b = n + l - 1



29.
In a 3 phase bridge inverter of 180^o mode, at any instant

A) 3 SCRs conduct

B) 2 SCRs conduct

C) 2 SCRs and 1 free wheeling diode conduct

D) 1 SCR and 1 free wheeling diode conduct



30.
How many times RAR instruction should be executed to make the contents of the accumulator in 8085 unchanged?

A) 9

B) 8

C) 7

D) 2



Answer: 21-B; 22-B; 23-B; 24-B; 25-C; 26-A; 27-C; 28-C; 29-B; 30-A.