Automation and Industrial Logic Programming Questions

Computer Science - COS

Semester: Second Semester

Level: 300

Year: 2018

REPUBLIC OF CAMEROON THE UNIVERSITY OF BAMENDA

Peace-Work-Fatherland P.O. Box 39 Bambili

Resit Examinations

School: HTTTC Department: Computer Science Option: FCS Level: 200

Course Code: CSC212 Course Title: Automation and industrial logic programmable

Lecturer: Mr. Tchahou Credit Value: 2

Date: Time: 1 hour Start Time: End Time:

Exercise 1: Questions 1 to 6 have four answer options: A, B, C or D. Choose the correct answer from the

answer options.

1- The term PLC stands for: (A) Personal logic computer. (B) Programmable local computer. (C)Personal logic

controller. (D) Programmable logic controller

2- Which of the following is most likely to be the voltage level used internally in a PLC, excluding the

voltage levels that might occur during conditioning in output/input channels: (A) 5 V. (B) 24 V. (C) 110

V. (D) 240 V.

3- Decide whether each of these statements is True (T) or False (F). A limit switch: (i) can be used to

detect the presence of a moving part. (ii) Is activated by contacts making or breaking an electrical

circuit.(A) (i) T (ii) T, (B) (i) T (ii) F, (C)(i) F (ii) T, (D)(i) F (ii) F.

4- Decide whether each of these statements is True (T) or False (F). A proximity switch is required for

detecting the presence of a non-metallic object. Types of switches that might be suitable are: (i) Eddy

current type. (ii) Capacitive type.(A) (i) T (ii) T, (B) (i) T (ii) F, (C)(i) F (ii) T, (D)(i) F (ii) F.

5- Decide whether each of these statements is True (T) or False (F). Figure 1 shows a ladder diagram rung

for which: (i) The input contacts are normally open. (ii) There is an output when there is an input to the

contacts.(A) (i) T (ii) T, (B) (i) T (ii) F, (C)(i) F (ii) T, (D)(i) F (ii) F.

6- Decide whether each of these statements is True (T) or False (F). Figure 2shows a ladder diagram rung

for which there is an output when: (i) Input 1 is momentarily activated before reverting to its normally

open state. (ii) Input 2 is activated.(A) (i) T (ii) T, (B) (i) T (ii) F, (C)(i) F (ii) T, (D)(i) F (ii) F.

Figure 1 Figure 2

Exercise 2:A signal lamp is required to be switched on if a pump is running and the pressure

is satisfactory, or if the lamp test switch is closed. Draw the ladder and the related instruction

list.

www.schoolfaqs.net