TI15 - Pre-Instructional Survey
Name: __________________________________________ Date ________________
1.
Current flow is initiated by the movement of a/an:
a.
b.
c.
d.
2.
The VOLT is a measurement of
a.
b.
c.
d.
3.
Current Flow
Electrical Potential
Resistance
None of the above
The OHM is a measurement of
a.
b.
c.
d.
5.
Current Flow
Electrical Potential
Resistance
None of the above
The AMPERE is a measurement of
a.
b.
c.
d.
4.
Insulator through a magnetic field
Conductor
Conductor through a magnetic field
Insulator
Current Flow
Electrical Potential
Resistance
None of the above
If a series circuit has the following: 10 V applied, 20 ohms load—What is the
current?
a.
b.
c.
d.
0.1 Amp
0.5 Amp
1.0 Amp
5.0 Amp
 2009, ISA
TI15 (4.2)
1
6.
In a parallel circuit with two resistors of 250 and 500 ohms, if the current flow
through the 250 ohm resistor is 1 amp, what is the total current flow?
a.
b.
c.
d.
7.
Why is a bridge used in instrumentation measurements?
a.
b.
c.
d.
8.
Because it allows loads to cross current streams
Compares an unknown to a known
It’s always done that way
Alignment
Does current flow into a capacitor effectively stop when it is fully charged?
a.
b.
c.
d.
9.
1.0
1.5
3.0
3.5
No
Yes
Maybe
Serially
There is _______ degrees between Phase A and Phase B in three phase power.
a. 120
b. 180
c. 90
d. 60
10. How long will it take a 1 µfd capacitor to fully charge through a 1 Meg ohm
resistor?
a.
b.
c.
d.
1 second
3 seconds
5 seconds
7 seconds
11. How long will it take for the maximum magnetic field to build up from zero for an
inductor of 10 H with a series resistance of 2 ohms?
a.
b.
c.
d.
5 seconds
15 seconds
25 seconds
50 seconds
 2009, ISA
TI15 (4.2)
2
12. What peak voltage of an AC sine wave is equivalent to 10 volts DC?
a.
b.
c.
d.
7.07 V
10.00 V
14.14 V
20.00 V
13. If an AC wave form has a period of .0002 seconds, what is its frequency?
a.
b.
c.
d.
2000 Hz
3000 Hz
4000 Hz
5000 Hz
14. A 100 µfd capacitor has what reactance at 1000 Hz?
a.
b.
c.
d.
1.59 ohms
15.9 ohms
159 ohms
1590 ohms
15. A 10 H choke has what reactance at 250 Hz?
a.
b.
c.
d.
1.57 ohms
157 ohms
1570 ohms
15700 ohms
16. A transformer with a 240 V Primary and a 24 V secondary has what turns ratio?
a.
b.
c.
d.
1:10
1:100
10:1
100:1
17. If the transformer in question 16 has a 5 Amp load in the secondary, what is the
minimum current that will be drawn in the primary (assuming 100% efficiency)?
a.
b.
c.
d.
0.5 Amp
5.0 Amp
10 Amp
50 Amp
 2009, ISA
TI15 (4.2)
3
18. If a transformer requires 40 Watts in the primary for a 26 Watt load, what is its
efficiency?
a.
b.
c.
d.
40%
65%
70%
90%
19. The green wire ground is for:
a.
b.
c.
d.
Electrical noise reduction
Robust mechanical strength
Safety of personnel and equipment
Shielding and grounding of electrical equipment
20. Alternating Current is the energy:
a.
b.
c.
d.
Not found in nature
Provided by batteries
Of a physics analogous concept
Generated by power plants
21. The circuit must be ______ and the measurement made in ________ to measure
current in an electrical circuit
.
a. Energized ; parallel
b. De-energized ; parallel
c. Energized ; series
d. De-energized ; series
22. The circuit must be ______ and the measurement made in ______ to measure
voltage in an electrical circuit
.
a. Energized ; parallel
b. De-energized ; parallel
c. Energized ; series
d. De-energized ; series
23. The circuit must be ______ and ______ to measure resistance in an electrical
circuit
a.
b.
c.
d.
Energized ; in parallel
De-energized ; isolated
Energized ; isolated
De-energized ; in series
 2009, ISA
TI15 (4.2)
4
24. ________ Watts of electrical energy is equal to one (1) HP.
a.
b.
c.
d.
212
746
1024
1800
25. The capacitance of a capacitor is determined by _________ _________ and
_________ .
a. The size of the plates; the length of the plates; the distance between the plates
b. The area of the plates; the distance between the plates; the overall size of the
capacitor
c. The area of the plates; the distance between the plates; the dielectric material
separating the plates
d. The dielectric separating the plates; the distance between the plates; the
resistance
 2009, ISA
TI15 (4.2)
5
TI15 - Pre-Instructional Survey Answer Sheet
1.
2.
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4.
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8.
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10.
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14.
15.
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17.
18.
19.
20.
21.
22.
23.
24.
25.
c
b
a
c
b
b
b
b
a
c
c
c
d
a
d
c
a
b
c
d
c
a
b
b
c
 2009, ISA
TI15 (4.2)
1