Related Questions

Routers operate at layer _____. LAN switches operate at layer _____. Ethernet hubs operate at layer _____. Word processing operates at layer _____.
A 3, 3, 1, 7
B 3, 2, 1, none
C 3, 2, 1, 7
D 3, 3, 2, none
E All of the above
The time of closing the cycle, in modern circuit breakers is
A 0.003 sec
B 0.001 sec
C 0.01 sec
D 0.10 sec
E none of the above
Which of the following circuit breakers has high reliability and minimum maintenance ?
A Air blast circuit breakers
B Circuit breaker with SF6 gas
C Vacuum circuit breakers
D Oil circuit breakers
Circuit breakers are essentially
A current carrying contacts called electrodes
B arc extinguishers
C circuits to break the system
D transformers to isolate the two systems
E any of the above
Insulation resistance of high voltage circuit breakers is more than
A 1 mega ohms
B 10 mega ohms
C 100 mega ohms
D 500 mega ohms
Chip breakers are used to
A Increase tool life
B Remove chips from bed
C Break the chips into short segments
D To minimize heat generation
You are given two statements numbered (i) and (ii) Read both the statements and mark you answer.Statements:i. The police authority has recently caught a group of house breakers. ii. The citizens group in the locality have started night vigil in the area. 
A Statement (i) is the cause and statement (ii) is its effect;
B Statement (ii) is the cause and statement (i) is its effect;
C Both the statements (i) and (ii) are independent causes;
D Both the statements (1) and (ii) are effects of some common causes.
A survey was conducted among the students of Khulna University to find out how many forms of physical exercise usually swam, 25% said they usually did jogging, 20% said they played cricket, 15% said they usually played football and 20 respondents said they did not take any form of exercise. From the above findings it can be concluded that.
A The student of khulna University do not usually take physical exercise.
B No respondent took more than one form of exercise.
C The method of data collection was not valid.
D Some of the respondents took more than one form of exercise.
Copper oxide rectifier is usually designed not to operate above
A 10°C
B 20°C
C 30°C
D 45°C
In deriving ac equivalent circuit for an amplifier circuit we short circuit
A All resistors
B All transistors
C All inductors
D All capacitors

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