8/17/2019 Tugas Listrik kapal 1 UAS Unsada By Ridwan.pdf

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TUGAS LISTRIK KAPAL 1 PRA UAS 

Disusun :

Nama : Muhammad Kurniawan 

NIM : 2014310008 

FAKULTAS TEKNOLOGI KELAUTAN 

JURUSAN TEKNIK PERKAPALAN 

UNIVERSITAS DARMA PERSADA 

JAKARTA 

2015 

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Final Exam

The final exam is intended to be a learning tool. The book may be used during the exam. A

tear-out answer sheet is provided. After completing the test, mail the answer sheet in for

grading. A grade of 70% or better is passing. Upon successful completion of the test a

certificate will be issued.

Questions

1. A material that is a good insulator is

d. rubber

2. A material with more protons than electrons has a

b. posit ive charge

3. In a simple electric circuit with a 12 volt supply, and a 24 Ω resistor, current is

d. 0.5 amps

I =

  =

  = 0.5 Amps. 

4. The total resistance in a series circuit containing three, 10 Ω , resistors is

b. 30 Ω  

R t  = R 1 + R 2 + R 3 

= 10 + 10 + 10

= 30 Ohm

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5. In a 12 volt series circuit where R 1=10 Ω, R 2=20 Ω, and R 3=10 Ω, current flow through

R2 is

a. 0.3 amp

Dik. E = 12 Volt

R t  = R 1 + R 2 + R 3 

= 10 + 20 + 10

= 40 Ohm

Dit. I = ?

Jwb. I =

  =

  = 0.3 Amps.

6. In a circuit containing three 30 Ω resistors in parallel, the total resistance is

c. 10 Ω  

  =

 +

 +

 

  =

 +

 +

 

  =

 

R t  =

 = 10 Ohm

7. The rate at which work is done is called

b. power

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8. Power in a simple 12 volt, 4 amp series circuit is

d. 48 watts

Dik. E = 12 v

I = 4 amp

Dit. P = …watt ? 

Jwb. P = E x I

P = 12 x 4

= 12 x 4 = 48 watt 

9. The instantaneous voltage at 150 degrees of an AC sine wave whose peak voltage is 480

volts is

a. 415.7 volts c. 240 volts b. 480 volts d. 0 volts

10. The effective voltage of an AC sine wave whose peak voltage is 480 volts is

a. 415.7 volts c. 480 volts b. 339.4 volts d. 679 volts

11. The time constant of a series circuit with a 10 mh inductor, and a 5 Ω resistor is

a. 2 mi ll iseconds

Dik. L = 10 MH

R = 5 Ω 

Dit. t =

 

t =

 = 2 milliseconds 

12. The total inductance of a series circuit containing three inductors with values of 10mh, 20

mh, and 40 mh is

d. 70 mh

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Lt = L1 + L2 + L3 

= 10 mh + 20 mh +40 mh

= 70 mh

13. The time constant for a series circuit with a 20 Ω  resistor and a 4 MF capacitor is

a. 80 microseconds

Dik. R = 20 Ω 

C = 4 MF

t = RxC

t = 20 Ω x 4 MF = 80 microseconds

14. Total capacitance for a series circuit containing a 2 MF, 4 MF, and 8 MF capacitors is

c. 1.14 MF

  =

 +

 +

 

  =

 +

 +

 

  =

 

  =

  = 1.14 MF 

15. Total opposition to current flow in an AC circuit that contains both reactance and resistance

is called

c. impedance

16. In a 60 hertz circuit containing 5 millihenrys of inductance, inductive reactance is

a. 1.884 Ω  

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Dik. F = 60

L = 5 mh = 0.005 h

Dit. XL = ?

Jwb. XL = 2Πfl 

XL = 2 x 3.14 x 60 x 0.005

XL = 1.884 Ω 

17. In a purely inductive circuit

b. cur rent lags voltage by 90 degrees

18. In a series AC circuit with a 20 Ω resistor and a 10 Ω  inductive reactance, impedance is

d. 22.4 Ω  

Dik.

R = 20 Ω 

XL = 10 Ω 

Dit.

Z = ?

√   

√   

√   

√    

19. A series AC circuit containing more capacitive reactance than inductive reactance is

c. capacitive

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20. An iron-core transformer with 120 volt, 10 amp primary, and 5 amp secondary is a

a. step down transformer with a 60 volt secondary

 b. step up transformer with a 240 volt secondary

c. step up transformer with a 480 volt secondary

d. step down transformer with a 30 volt secondary