cameroon gce advanced level 2025 electrical automatic control of electrical machines 1

 

Question 1

 

In GRAFCET, the area where work is done is called:

A. A step

B. An action

C. A transition

D. A link

 

Question 2

 

Functional specifications are done in the form of GRAFCET called:

A. Functional GRAFCET

B. GRAFCET level 1

C. Specification GRAFCET

D. GRAFCET level 2

 

Question 3

 

The part of the CPU of a PLC that receives, analyses, processes and sends information is:

A. a memory

B. processor

C. sensor

D. actuator

 

Question 4

 

In a PLC, the memory EAROM means:

A. Electrically Alterable Read Only Memory

B. Electrical Alternating Read Only Memory

C. Erase Alterable Random Only Memory

D. Erase Access Read Only Memory

 

Question 5

 

The functional diagram of Figure 1 is that of:

A. Delta star forward and reverse

B. Resistor starting forward and reverse

C. Delta star resistance forward and reverse starting

D. Forward and reverse DOL starting

 

Question 6

 

Which of these is not a programming method?

A. Boolean algebra programming

B. GRAFCET programming

C. Electric programming

D. Ladder (contact) programming

 

Question 7

 

The name plate of an asynchronous motor shows 380/660V. With a supply voltage of 380V The stator windings will be coupled in:

A. Star

B. Zig – Zag

C. Star – delta

D. Delta

 

Question 8

 

In the Capacitor Start method, the run capacitor is connected:

A. In parallel with the start winding

B. In series with the run winding

C. In parallel with the run winding

D. In series with the start winding

 

Question 9

 

The starter is a device which is used for switching and protecting the electric motor from the dangerous overloads by tripping. It:

A. Reduce the starting current to the AC induction motors and also increase the motor torque.

B. Increase the starting current to the AC induction motors and also increase the motor torque.

C. Reduces the starting current to the AC induction motors and also reduces the motor torque.

D. Increase the starting current to the AC induction motors and also reduces the motor torque.

 

Question 10

 

An automated control system using relay modules which memorize each step of the cycle is:

A. Electro-magnetic sequencer

B. Electro-mechanic sequencer

C. Pneumatic sequencer

D. Electronic sequencer

 

Question 11

 

The portion of the GRAFCET of Figure 2 above shows a structure of:

A. AND Convergence

B. AND Divergence

C. OR Convergence

D. OR Divergence