Related Questions

The hot resistance of the bulb's filament is higher than its cold resistance because the temperature coefficient of the filament is
A Zero
B Negative
C Positive
D About 2 ohms per degree
Which of the following is having the lowest value of overall heat transfer coefficient?
A Feed water heaters
B Air condensers
C Air to low viscosity liquids
D Steam condensers
The scales form in heat exchanges after a period of operation and provide additional resistance to heat transfer with some heat transfer coefficient . The reciprocal of this scale heat transfer coefficient is called .
A scaling factor
B forming factor
C resisting factor
D fouling factor
There are five persons sitting on a bench. Blue eyed lady sitting in the middle is my mother. At the extreme left, the man with grey hair is my maternal uncle. Lady sitting at the extreme right is having a pimple on her nose and is the wife of person who is sitting between blue eyed lady and grey haired man and has a pointed nose. A lady having marks on her face is the younger sister of the blue eyed lady and sitting on the remaining fifth place. The person having a pointed nose is the son of the blue eyed lady. What is the lady having marks on her face to the man sitting at extreme left ?
A Wife
B Maternal Aunt
C Sister
D Sister-in-law
Which of the following resistive materials has the lowest temperature co-efficient of resistance ?
A Nichrome
B Constantan
C Kanthal
D Molybdenum
The average marks of a student in 10 parers are 80. If the highest and the lowest scores are not considered, the average is 81 . If his highest score is 92. find the lowest.
A 55
B 60
C 62
D None of these
In case of parallel flow heat exchanger, the lowest temperature theoretically attainable by the hot fluid is __________ the outlet temperature of the cold fluid.
A Equal to
B More than
C Less than
D Either more or less than (depending upon the fluid)
The C.O.P for reverse Carnot refrigerator is 2. The ratio of lowest temperature to highest temperature will be
A twice
B half
C four times
D three times
A semiconductor has ___________ temperature coefficient of resistance.
A Positive
B Zero
C Negative
D None of the above
Temperature coefficient of resistance is expressed in terms of
A ohms/°C
B mhos/ohm°C
C ohms/ohm°C
D mhos/°C

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