BBB Previous Years Solved Sample Placement Papers
- Removing bypass capacitor across the emitter-leg resistor in a CE amplifier causes:
(a) increase in current gain
(b) decrease in current gain
(c) increase in voltage gain
(d) decrease in voltage gain
(Ans: D) - When a step-input is given to an op-amp integrator, the output will be:
(a) a ramp
(b) a sinusoidal wave
(c) a rectangular wave
(d) a triangular wave with DC bias
(Ans: A) - Hysteresis is desirable in Schmitt-trigger, because:
(a) energy is to be stored/discharged in parasitic capacitances
(b) effects of temperature would be compensated
(c) devices in the circuit should be allowed time for saturation and desaturation
(d) it would prevent noise from causing false triggering
(Ans: C) - Space charge region around a p-n junction:
(a) does not contain mobile carriers
(b) contains both free electrons and holes
(c) contains one type of mobile carriers depending on the level of doping
(d) contains electrons only as free carriers
(Ans: A) - The important characteristic of an emitter-follower is:
(a) high input impedance and high output impedance
(b) high input impedance and low output impedance
(c) low input impedance and low output impedance
(d) low input impedance and high output impedance
(Ans: B) - The district administration has issued a circular to all farmers advising against indiscriminate use of pesticides as it may pollute the groundwater.
I People may stop using groundwater if pesticides continue to be used indiscriminately.
II Farmers may refrain from using pesticides indiscriminately.
(A) Only assumption I is implicit
(B) Only assumption II is implicit
(C) Either I or II is implicit
(D) Neither I nor II is implicit
(E) Both I and II are implicit
Ans: B
- The Government has decided to levy a 2% surcharge on tax for funding drought relief programs.
I The Government does not have sufficient funds for drought relief.
II The amount collected by the surcharge may adequately fund these programs.
(A) Only assumption I is implicit
(B) Only assumption II is implicit
(C) Either I or II is implicit
(D) Neither I nor II is implicit
(E) Both I and II are implicit
Ans: E
- Find the statement that must be true:
Vincent delivers 37 newspapers every morning in 50 minutes. If he's unavailable, Thomas from the same street helps out.
(A) Vincent and Thomas live in the same neighborhood.
(B) It takes Thomas longer than 50 minutes.
(C) It is dark when Vincent starts.
(D) Thomas wants his own paper route.
Ans: A
- In this company, 60% of employees are males, 40% are females, 80% are sincere, and 40% are from Rawalpura.
(A) All male employees are from outstation.
(B) All male employees are sincere.
(C) 20% of female employees are not sincere.
(D) All female employees are from Rawalpura.
(E) None of these
Ans: E
- QAR, RAS, SAT, TAU, _____
(A) UAV
(B) UAT
(C) TAS
(D) TAT
Ans: A