Sample 2022 PCE Electrical

> **Disclaimer** *None of the authors, contributors, administrators, vandals, or anyone else connected with this section, in any way whatsoever, can be responsible for your use of the information contained in or linked from these web pages. All the questions and answers in this section are the product of the contributors' experience and PE-PEPC WIKI assumes no responsibility for errors, inaccuracies, omissions, or any other inconsistencies herein. Any resemblance to any exam questions is purely coincidental.*
>
>

### **Electrical**

#### *Objective*

1. Energy efficient performance of electrical equipment, which of the following does Energy Commission have control and approval of?
	* I LV equipment direct
	* II LV Equipment
	* III Electrical Equipment
	* IV. Electrical Equipment for domestic use
	* V. LV Equipment have specialty skills
2. A high rise office taking 11kV source from TNB, what is the tolerance level at User Control Points
3. Underground power cable is preferred because of:
	* A. Lower maintenance cost
	* B. Public safety
	* C. Reduce of power failure
	* D. Visual impact
	* E. All above
4. Dry type transformer suitable for:
	* A. 80 storey of high rise
	* B. Factory produce paper
	* C. Shopping Mall
	* D. Hospital with 10 OTs
	* E. Wharf supply power to ships
5. Which of following can do submission to authorities
	* A. Professional Engineer
	* B. PEPC (Electrical)
	* C. Competent Engineer
	* D. Wireman
	* E. PEPC (Electrical) registered with an Electrical ECP
6. Generation plant with 40MVA turbine, 11kV and 0.8 Power Factor, what is the capacity to be registered with ST?
7. Inside a factory, designed with 2 transformer, T1 connection in Dyn11, T2 in Dy1, which the following is FALSE?
	* A. T1 and T2 cannot connect in parallel
	* B. T2 phase shifted +30degree
	* C. Star point of T2 connected to ground
	* D. T1 have 4 terminal
	* E. common to find T1 in industry
8. Capacitor bank fail prematurely during commissioning, what could be the reason:
	* A. Frequent operation of relay
	* B. Harmonics
	* C. Lack of maintenance
	* D. High ambient temperature
	* E. Under rated voltage
9. Ferranti effect usually associated with:
10. Reason of LV MSB have 2 section opened, which of the following is TRUE:
	* A. reduce fault level
	* B. eliminate resonance
	* C. cut -- of 2 differences of transformer
	* D. security of power supply
	* E. improve power factor

#### *Essay*

1) Electrical Safety and Efficient Management of Electrical Energy Regulations 2008 (EMEER 2008)

* a) how to ensure the electrical installation in Malaysia is save for public, elaborate action taken (20marks)
* b) how does ST know which consumer fall under the Efficient Management of Electrical Energy Regulations 2008 (EMEER 2008) (30marks)
* c) Should a premise be subjected to EMEER, discuss the Obligation of consumer under EMEER (30marks)
* d) Use of 30mA is required, discuss why (20marks)

5) a 5MVA transformer ---

* a) list down the relay for protection of the transformer and each functions (40 marks)
* b) how to inrush current and avoid unnecessary tripping during magnetizing (10 marks)
* c) Discuss the test required for genset during factory test and commissioning test. Assuming 3 generator for a building, 2 to utilize during day, and subject to the load profile, 1 using during night. And at any time, shall remain 1 with essential supply. (50 marks)