Which of the following is a device designed to protect electrical devices from voltage spikes?

Dog spikes are used for fixing rail to the

A

wooden sleepers

B

CST-9 sleepers

C

steel trough sleepers

D

concrete sleepers

Number of dog spikes normally used per rail seat on curved track is

A

one on either side

B

two outside and one inside

C

one outside and two inside

D

two outside and two inside

Which of the following represents examples of an IT input device, output device and storage device respectively ?

A

bar code reader, CD drive, projector

B

keyboard, monitor, hard disc

C

printer, DVD drive, joystick

D

printer, mouse, monitor

To protect most of the electrical equipment handling low power, the types of relays used are

A

Thermocouple

B

Electronic and bimetallic

C

Both (A) and (B)

D

None of the above

How can you totally protect a PC from damage during an electrical storm?

A

Disconnect the AC power cable

B

Disconnect all external cables and power cords

C

Use a surge protector

D

Turn off the AC power

E

None of the above

Name the international treaty designed to protect the ozone layer from CFCs.

A

Sigma protocol

B

Montreal protocol

C

Ozone protocol

D

Green protocol

When the graph between current through and voltage across a device is a straight line, the device is referred to as ___________

A

linear

B

active

C

nonlinear

D

passive

Which of the following allows devices on one network to communicate with devices on another network?

A

multiplexer

B

gateway

C

t-switch

D

modern

E

None of the above

Devices on one network can communicate with devices on another network via a

A

file server

B

utility server

C

printer server

D

gateway

E

None of the above

Which of the following devices converts Chemical energy into Electrical energy?

A

Electric heater

B

Electric fan

C

Hair dryer

D

Electric cell

Which of the following is a device designed to protect electrical devices from voltage spikes?

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