# Electrical Engineer (Qatar Exam) Test-21

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Qatar engineering registration exam preparation

• 1
A system with an initial cost of s 90,000 has an operating cost of s 2.50/hr and is operated 16 hr/day for 300 days/year. After 10 years, the system has a salvage value of s 10,000, Assuming the interest rate is constant at 10%, the total annualized cost over the 10-year life is
• 2
System with a n initial cost of 90000 dollars has an operating cost of 2.50 dollars per hour and is operated 16 hr /day for 300 days/year. After 10 years, the system has salvage value of 10000 dollars. Assuming the interest rate is constant at 10% the total analyzed cost over the 10-year life is most nearly
• 3
A SCADA system configuration requires maximum values (i.e., the actual value of current when the transducer is at full scale). The transducer ahs a fll-scale ac current of 5A. Sing a current transformer wit a trns raito of 400.5. the maximum current value (amperes) is most nearly

• 4
The most important end state of project initiation is
• 5
Following successor relationships are available for a project. What is the duration of the project?
• 6
When the receiver in previous question is turned to 540 kHz station, what other AM station offers ^ potential interference?

• 7
The main activity in project scope definition is to
• 8
This is a type of semiconductor that only allows current ot flow in one direction. it is usually used to rectify AC signals (conversion to DC)
• 9
Three 30-pF capacitors are connected in star (Y) form between the terminals A, B, C and a junction point N as shown in the figure, the capacitance (pF) between terminals A and B is most nearly.
• 10
The Output D in the circuit is.

• 11
For the diagram shown, what is the approximate required minimum clearance distance, R, if the phase voltage of the live parts is 13,800 V?
• 12
The output is to be maintained at 24 V, while the input varies from 120 V to 126 V with a load current ranging from OA to 5A . Assume ideal conditions, that is the keep alive current is zero and the zener resistance Rz is negligible
• 13
A large-scale integrated (LSI) circuit is shown in the figure below. What is the best description of the circuit?
• 14
A 3-phase distribution line conductor configurations a s follows *3ft —>* 4ft —>*
• 15
We have three resistances each of 1 ohm. How many different values of resistance can be obtained by different series-parallel combinations if all the three resistances are to remain in the circuit?
• 16
The system shown is stable for

• 17
An ac voltmeter with a full-scale range of 5V is used to measure the output voltage of an amplifier. The amplifier has an out put impedance of 2000 'Q, and the meter has a sensitivity of 2000 'Q/v. When connected to the amplifier, the meter reads 2.5 V . if a different meter with a sensitivity of 100000 'Q/V and a fll scale meter of 5V is connected to the amplifier, the voltmeter reading (V) will be
• 18
The out put is to be maintained at 24v while the input varies from 120 v to 126 v with a load current ranging from 0 A to 3A . Assume ideal conditions that is the keep alive current its zero and the zero resistance R is negligible.What is the required supply resistance to ensure proper operation of the zenar regulator circuit.
• 19
When a fuse is rated 8A, it means
• 20
The travelling cranes are mostly driven by: