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Unit 03 - MEC 302

Total questions: 46

Worksheet time: 4hrs 37mins

Name
Class
Date
1.

In computer, VDU stands for _________________________________.

a)

Visual Display Unit

b)

Very Dangerous Unit

c)

Viewer Discretion Utility

d)

Visual Dimension unit

2.

_______________ is the immediate condition of the surrounding.

a)

ambient

b)

dimension

c)

temperature

d)

pressure

3.

The position in which someone holds their body when standing or sitting.

a)

motion

b)

movement

c)

posture

d)

trail

4.

The joint that connects the hand with the forearm.

a)

hand

b)

wrist

c)

leg

d)

thigh

5.

Injury in the muscle or body parts.

a)

stress

b)

wound

c)

strain

d)

numb

6.

In ergonomic, what do you mean by RSI?

a)

Repetitive Stroke Illness

b)

Remote Station Indicator

c)

Relieving stress infection

d)

Repetitive Strain Injury

7.

The first and the most important thing you do before using an input devices?

a)

check the contacts and terminals

b)

check the indicator

c)

check the size

d)

check the length

8.

The physical contact between the PLC processor and the outside world.

a)

input and output module

b)

LED

c)

transistor

d)

thyristor

9.

The processor is connected to the external field devices using _______________.

a)

opto-coupler

b)

limit switch

c)

push button

d)

cable

10.

A devices that uses an electromagnet to operate a pair of movable contacts from an open position to a closed position or vice versa.

a)

electromagnetic relay

b)

electronic relay

c)

pneumatic relay

d)

hydraulic relay

11.

An electromechanical valve that uses electric current to generate a magnetic field that regulates the opening of fluid flow.

a)

limit switch

b)

push button

c)

relay

d)

solenoid valve

12.

A cylindrical coil of wire acting as a magnet when there is electric current.

a)

solenoid

b)

polaroid

c)

toroid

d)

android

13.

A continuous physical quantity such as voltage and current i.e. 4-20 mA, 0- 10 VDC.

a)

square wave

b)

digital

c)

analog

d)

saw tooth

14.

Individually separate; not continuous quantity i.e. 0 or 1.

a)

square wave

b)

digital

c)

analog

d)

saw tooth

15.

In electrical device, the point of connection is called _________________.

a)

terminal

b)

assembly point

c)

pointer

d)

connector

16.

A device which detects or measures a physical property and records, indicates, or otherwise responds to it

a)

Interface

b)

connector

c)

sensor

d)

scanner

17.

A combined electrical and mechanical system.

a)

electromechanical

b)

hydraulic

c)

pneumatic

d)

piezoelectric

18.

A typ of relay used in the PLC that does not exist in the outside world.

a)

field device

b)

internal relay

c)

solenoid relay

d)

electrical relay

19.

The diagram below represents

a)

pictorial diagram

b)

wiring diagram

c)

ladder diagram

d)

block diagram

20.

The symbol below is :

a)

Open circuit

b)

Light bulb

c)

Connection points

d)

Closed circuit

21.

This PLC symbol stands for _____________.

a)

coil

b)

reset

c)

timer

d)

counter

22.

This PLC symbol stands for _____________.

a)

coil

b)

reset

c)

normally open contact

d)

normally closed contact

23.

This PLC symbol stands for _____________.

a)

coil

b)

reset

c)

normally open contact

d)

normally closed contact

24.

How many bits in one byte?

a)

16 bits

b)

4 bits

c)

8 bits

d)

32 bits

25.

1 word is equal to ____________ bytes

a)

2

b)

4

c)

8

d)

16

26.

A number system which uses a base of 2 is called _____________.

a)

binary

b)

decimal

c)

hexadecimal

d)

roman numeral

27.

A number system which uses a base of 10 is called _____________.

a)

binary

b)

decimal

c)

hexadecimal

d)

roman numeral

28.

From the given ladder diagram, the part labelled with number 1 is called _________________.

a)

Rung

b)

Rail

c)

contact

d)

coil

29.

From the given ladder diagram, the part labelled with number 2 is called _________________.

a)

Rung

b)

Rail

c)

contact

d)

coil

30.

From the given ladder diagram, the part labelled with number 3 is called _________________.

a)

Rung

b)

Rail

c)

contact

d)

coil

31.

From the given ladder diagram, the NC contact "CR3" is called ________________ of coil CR3.

a)

auxiliary

b)

mechanical

c)

passive

d)

switch

32.

The given ladder diagram is equivalent to ___________ gate.

a)

OR

b)

AND

c)

NOT

d)

NOR

33.

The given ladder diagram is equivalent to ___________ gate.

a)

OR

b)

AND

c)

NOT

d)

NOR

34.

The given ladder diagram is equivalent to ___________ gate.

a)

OR

b)

AND

c)

NOT

d)

NOR

35.

The given ladder diagram is equivalent to ___________ gate.

a)

OR

b)

AND

c)

NOT

d)

NOR

36.

The given ladder diagram is equivalent to ___________ gate.

a)

OR

b)

NAND

c)

NOT

d)

NOR

37.

The given ladder diagram is equivalent to ___________ gate.

a)

OR

b)

NAND

c)

NOT

d)

NOR

38.

From the given diagram.

If the value of X = 0, find the value of Y?

a)

1

b)

0

39.

A __________ is a PLC function used to validate the time ranges during which actions can be executed

a)

counter

b)

timer

c)

clock

d)

coil

40.

A __________ is a PLC function used to delay, prolong and control actions over a predetermined period

a)

counter

b)

timer

c)

clock

d)

coil

41.

A __________ is a PLC function used to count pulses.

a)

counter

b)

timer

c)

clock

d)

coil

42.

Normally Open contacts are also called ________________.

a)

examine on

b)

examine off

c)

steady on

d)

steady off

43.

Normally Closed contacts are also called ________________.

a)

examine on

b)

examine off

c)

steady on

d)

steady off

44.

This diagram is called ___________.

a)

truth table

b)

combinational table

c)

number table

d)

input output table

45.

A class of binary encodings of decimal numbers where each decimal digit is represented by a fixed number of bits, usually four or eight.

a)

Binary Coded Decimal

b)

Binary

c)

Hexa decimal

d)

Flasting number

46.

__________________ is a combination of Mechanical, Electrical, Electronics and Computer system to develop automated system.

a)

mechatronics

b)

electrical

c)

mechanical

d)

electronics