Analytical Instrumentation Mcqs

Q:

In TTL logic, the input transistor has a number of ________ equal to the desired fan-in of the circuit.

A) Base B) Collect
C) Emitter D) Gate
 
Answer & Explanation Answer: C) Emitter

Explanation: In TTL logic, the input transistor has a number of emitters equal to the desired fan-in of the circuit. This is a major advantage.

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171
Q:

The basic function of TTL gate is which of the following functions?

A) AND B) OR
C) NOR D) NAND
 
Answer & Explanation Answer: D) NAND

Explanation: The basic function of TTL gate is a NAND function. It is the most popular logic family.

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87
Q:

Which of the following is the most widely employed logic family?

A) Emitter-coupled logic B) Transistor-transistor logic
C) CMOS logic family D) NMOS logic
 
Answer & Explanation Answer: B) Transistor-transistor logic

Explanation: Transistor-transistor logic is the most widely employed logic family. It is the most popular logic family.

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79
Q:

INHIBIT gate is ________ gate with an inhibiting input.

A) AND gate B) OR gate
C) EX-OR gate D) NOT gate
 
Answer & Explanation Answer: B) OR gate

Explanation: INHIBIT gate is OR gate with an inhibiting input. The gate is useful for controlling the inputs with an inhibiting signal.

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52
Q:

The output will be logic ‘1’ only if all the inputs are ‘0’. Which gate must be used to execute this condition?

A) AND gate B) NAND gate
C) NOR gate D) EX-OR gate
 
Answer & Explanation Answer: B) NAND gate

Explanation: The output will be logic ‘1’ only if all the inputs are ‘0’. NAND gate must be used to execute this condition.

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46
Q:

Two switches are in parallel and are connected with a lamp and supply in series. This represents which of the following logic gate?

A) AND gate B) OR gate
C) EX-OR gate D) NOT gate
 
Answer & Explanation Answer: B) OR gate

Explanation: Two switches are in parallel and are connected with a lamp and supply in series. This forms the OR gate.

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45
Q:

1001 is a data presented on a set of binary coded decimal output lines. What would be the decimal equivalent of this number in the case of negative logic?

A) 9 B) 6
C) 1 D) 8
 
Answer & Explanation Answer: B) 6

Explanation: The decimal equivalent of the number 1001 in the case of negative logic is 6. In the case of positive logic, the decimal equivalent will be 9.

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28
Q:

Which of the following is the binary equivalent of the decimal number 10?

A) 1100 B) 1010
C) 1011 D) 1110
 
Answer & Explanation Answer: B) 1010

Explanation: The binary equivalent of the decimal number 10 is 1010. The base of binary numbers is 2.

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