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Electrical Engineer (Qatar Exam) Test-19

20 Questions - Developed by: - Updated on: 2022-05-24 - 697 taken

Qatar engineering registration exam preparation

1

Intersecting point for WBS and OBS

Project matrix
Cost account
None of the above
Intersect matrix

2

The final step in the definition of a work breakdown structure is to

Assign codes for each activity of the work package
Develop the responsibility matrix
None of these are included in the final step
Assign the work package to the manager
Assign the cost account to a manager

3

What is the least instructive solution to connect hijacking?

Physical security of the communication link
Use of one-time password
High security login procedures
Full scale encryption

4

A 10MVA generator has power factor 0.866 lagging, the reactive power produced will be

10 MVA
1.34 MVA
5 MVA
8 MVA

5

For a transformer to be tested at full load conditions but consuming only losses from the main, we do

OC and SC tests
Back to back test
Load test
None of the above

6

A 400V/100V, 10KVA two winding transformer is reconnected as an auto transformer across suitable voltage source. The maximum rating of such an arrangement could be

8.75KVA
15KVA
50KVA
12.5KVA

7

A single-phase, 2,200/200 V transformer takes 1 A at the HT side or no load at a power factor of 0.385 lagging. The iron losses are

77 W
98 W
167 W
88 W

8

Neglecting resistance, at constant flux density, the power required per kilogram to magnetize the iron core of a transformer is 0.8 W at 25 Hz and 2.04 W at 60 Hz. The power required per kilogram for 100 Hz is

3.8 W
3.4 W
5.2 W
3.63 W

9

For an inverter op-amp, what will be the equivalent output resistance?

Infinity
Same as the input resistance
None of the above
0 D. Same
Relative forward resistance

10

When using Zener diode for voltage regulation, the output waveform shape will be affected by:

Input current passing through the diode
None
Dynamic resistance of the diode

11

What is the low pass filter?

It will let pass band frequencies?
It will let pass high frequencies?
It will let pass low frequencies?
It will eliminate a band of frequencies?

12

The load resistance of cascade amplifier is:

The resistance before the second stage.
The resistance before the first stage.
The resistance after the second stage.
The resistance after the first stage.

13

The output for the cascade amplifier is

The output of the first stage
None
Output of the last stage

14

The dynamic output resistance of transistor in CB configuration is _____ at constant IE:

ФVEB / ФIC
ФVEB / ФIE
ФVCB / ФIC

15

Sustainable development involves

Larger buildings using stronger design and a material
Reducing consumption, increasing efficiency and using renewable energies
Developing better transportation by building more roads
Using all resources at maximum rates
Searching for more deposits of fossil fuels

16

The activity on node network shown below describes a project consisting of 8 tasks A-H. Each node indicates duration in weeks relationship are finish-to-start. The minimum time to complete the project is

16 weeks
15 weeks
17 weeks
18 weeks

17

An engineer chooses open collector output TTL technology to provide sufficient current to drive a device. the circuit shown is implemented with a 7405 package and corresponds to the following logic function (assume that a logic 0 corresponds to)

NOR
AND
OR
NAND

18

The third harmonic of the Fourier series for the waveform in the figure has a frequency (Hz) of:

4,712
250
The third harmonic does not exist
750

19

Project control is a function that takes place:

Throughout the entire process
After construction is complete.
Before construction begins,
While construction is going on.

20

The forward pass in project network calculations determines the:

The longest time that the project can take
Earliest times an activity can begin
Earliest times an activity can be finished
All are correct

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