The resistance wire used in a hot wire anemometer for conducting electrical current is made of

A telephone switchboard 100 pair cable can be made up with either enameled wire or tinned wire. There will be 400 soldered connections. The cost of soldering a connection on the enameled wire will be P 1.65 on the tinned wire, it will be P 1.15. A 100- pair cable made up with enameled wire cost P 0.55 per linear foot and those made up of tinned wire cost P 0.75 per linear foot. Determine the length of cable run in feet so that the cost of each installation would be the same.

A

1,000 feet

B

1,040 feet

C

1,100 feet

D

1,120 feet

When the main switch of the house is put off it disconnects the: (A) Live wire only (B) Live wire and the earth wire (C) Live wire and the neutral wire (D) Earth wire and the neutral wire

A

B

A

C

D

C

Which of the following statements is/are correct? 1. A fuse wire is made of 37% lead and 63% tin 2. A fuse wire is made of 63% lead and 37% tin 3. A fuse wire has high resistance and low melting point 4. A fuse wire has low resistance and high melting point

A

1, 4 are correct statements

B

1, 3 are correct statements

C

2, 3 are correct statements

D

2, 4 are correct statements

Which of the following statements are true regarding cold and hot deserts: (a) Hot deserts have high temperature while cold deserts have low temperature. (b) hot deserts are battered by sun and are sandy. Cold deserts have ice and snow covered ground. (c) Hot deserts are red or orange while cold deserts are gray. (d) Hot and cold deserts experience a significant seasonal effect.

A

(a) and (b)

B

(a), (b) and (c)

C

(a) and (c)

D

(a), (b), (c) and (d)

Match the following Device Conversion of Energy (a) Windmill (i) Chemical Energy to electrical energy (b) Bulb (ii) Kinetic Energy to Electrical Energy (c) Electrical Cell (iii) Sound Energy to Electrical energy (d) Microphone (iv) Electrical Energy to Light Energy

A

(a) - (iii), (b) - (ii), (c) - (i), (d) - (iv)

B

(a) - (ii), (b) - (iv), (c) - (i), (d) - (iii)

C

(a) - (ii), (b) - (iii), (c) - (i), (d) - (iv)

D

(a) - (iii), (b) - (ii), (c) - (iv), (d) - (i)

Consider the following statements regarding the electrical properties of ceramic materials: 1. They are practically non-conductors at a lower temperature. 2. Ordinary glass and silicates in the molten state are dependable as electrical non-conductors. 3. They offer high resistance to the current transmission and get heated soon when conducting electric currents. Which of the above statements are correct?

A

1 and 2 only

B

1 and 3 only

C

2 and 3 only

D

1, 2 and 3

In the following question, sentences of a paragraph have been jumbled and labelled as A, B, C and D. You are required to rearrange the jumbled sentences of the paragraph and mark your response accordingly by selecting the correct option. A: Transformers can also be used for isolation, where the voltage in equals the voltage out, with separate coils not electrically bonded to one another. B: Transformers are most commonly used for increasing low AC voltages at high current (a step-up transformer) or decreasing high AC voltages at low current (a step-down transformer) in electric power applications. C: It was discovered in 1831. D: A transformer is a passive electrical device that transfers electrical energy from one electrical circuit to another.

A

DBCA

B

DCBA

C

DABC

D

BCDA

Hot wire anemometer is used to measure

A

Pressure in gases

B

Liquid discharge

C

Pressure in liquids

D

Gas velocities

Hot wire anemometer is used to measure the

A

Velocity of liquids

B

Temperature of liquids

C

Velocity of gases

D

Pressure of liquids

Hot wire anemometer is used for the measurement of

A

Flow rates of fluids

B

Flow rates of granular solids

C

Very high temperature

D

Thermal conductivity of gases

The resistance wire used in a hot wire anemometer for conducting electrical current is made of

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