Correct Answer:- Option-B
Question29:-The sag correction for chain line will be when ‘W* is the weight of the chain, ‘L’ is the span and *P* is the
tension or pull
க: 14202: / 24262:
5: 4/2 / 6”
(:-७४१२/ / 24702
0: #//^21^2` / 24
Correct Answer:- Option-C
Question30:-Natural error in levelling is caused due to
A:-Wind vibration
B:-Atmospheric refraction
C:-Temperature variation
D:-All the above
Correct Answer:- Option-D
Question31:-Find the time taken for a sinusoidal alternating current of maximum value 20A to reach 15A for the first time,
after being instantaneously zero, the supply frequency being 40 Hz
A:-2.35 ms
B:-3.37 ms
C:-4.44 ms
D:-1.23 ms
Correct Answer:- Option-B
Question32:-The voltage across a 20 YF capacitor is given by ‘V_c=10.75-1.5e*{-1000t}+0.75e* {-2000t}* .
What is the current through the capacitance.
03(e*{-1000 t}-e* {-2000 t})*
B:-'0.3(e*{-1000t}-e* {-2000t})*
C:-"3(e*{-1000t}-e* {-2000t})°
D:-*0.003(e* {-1000t}-e* {-2000t})*
Correct Answer:- Option-A

Question33:-Two coils having equal resistance but different inductances are connected in series. The time constant of the
series combination is

A:-Sum of the time constant of individual coils

B:-Average of the time constant of individual coils

C:-Geometrical mean of the time constant of individual coils

D:-Product of the time constant of individual coils

Correct Answer:- Option-B

Question34:-A network contains linear resistor and ideal voltage sources. If value of all the resistors are doubled, then
voltage across each resistor is

A:-Halved

B:-Doubled

C:-Not changed
D:-Increase 4 times
Correct Answer:- Option-C

Question35:-The current i(t) through a 10 ohm resistance in series with an inductance is given by i(t) = 3 + 4 sin (1004
45°) + 4 sin (300t + 60°)A. The rms value of current and power dissipated in the circuit are

A:-sqrt(41)* A, 410 W respectively

B:-‘sqrt(35)°A, 380 W respectively

C:-5 A, 250 W respectively

D:-11 A, 1210 W respectively

Correct Answer:- Option-C
Question36:-In full wave rectification, if the input frequency is 50 Hz, then the output frequency will be

A:-50 Hz

B:-75 Hz

C:-100 Hz

D:-200 Hz

Correct Answer:- Option-C
Question37:-A fully charged 12 V, 100 Ah battery is connected to a 1.2 റ load. The expected time for which the battery can
supply power to load is

A:-10 hours

B:-12 hours

C:-1.2 hours