# Electrical Engineer (Qatar Exam) Test-5

20 Questions - Developed by:
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Qatar engineering registration exam preparation

• 1
A copper cable used in a plain old telephone service line has a loss of 1.5 dB/km. What is the approximate loss experienced if the user is located 1.5km from a central office?
• 2
A lossy transmission line is used to connect a transmitter to an antenna. If the VSWR measured at the antenna end of the transmission line is 1.5, which of the following statement is correct?
• 3
Which of the following characteristics is not typical of a project manager:

• 4
The voltage gain of an amplifier with 9% negative feedback is 10. The voltage gain without feedback will be:
• 5
A de current of 50A is flowing in an isolated wire. The magnitude of the magnetic field intensity, H (A/m), 10cm from the center of the wire is: H= I/2πr
• 6
Which type of braking is used in an induction motor:

• 7
What is the common or usual method to ensure that the final set of construction documents satisfy the clients program and design goals?
• 8
In a cascade amplifier, to reduce the loading effect at the output, the output impedance of the last stage should be:
• 9
In a cascade amplifier, to reduce the loading effect at the input, the input impedance of first stage should be:
• 10
In which of the following circuit will the voltage source produce the most current:

• 11
Which of the following theorem is used for frequency?
• 12
The main cause of transformer humming is:
• 13
If the induction motor speed at no-load is 745 RPM, what is the speed of the motor?
• 14
Synchronous speed for motor 1600 RPM, 60hz, Calculate number of poles.
• 15
At what region of operation is the base emitter junction forward biased and the based collector junction reverse biased for BJT?
• 16
What is the role of the Zener diode?

• 17
The heat loss inside a straight conductor is 60J upon applying current I for 5s. If the resistance of the conductor is decrease to half, and the same current is applied for 5s, what will be the heat dissipation?
• 18
Why we use power factor correction device to:
• 19
Rotor of induction motor is rotating at synchronous speed, what is torque?
• 20
The underground cable is laid in a marine environment at system voltage A. What shall be the design of the cable insulation?