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What is the range of the multiplying factor when test data is not available?
Answer: b Explanation: The multiplying factor should be obtained from tests of motors of similar design. When test data is not available, a value of 1.75 to 2 may be used.
Answer: b
Explanation: The multiplying factor should be obtained from tests of motors of similar
design. When test data is not available, a value of 1.75 to 2 may be used.
See lessWhat are the factors which result in the bearing friction and windage loss?
Answer: d Explanation: The bearing friction and windage loss will depend upon the ball bearings. The bearing friction and windage loss will also depend upon the sleeve bearings.
Answer: d
Explanation: The bearing friction and windage loss will depend upon the ball bearings.
The bearing friction and windage loss will also depend upon the sleeve bearings.
See lessWhat is the friction and windage loss for a 1500 rpm machine?
Answer: a Explanation: The sleeve bearing having a stator outer diameter of 150 mm has losses at different running speed. The 1000 rpm machine gives loss of 3.7 W.
Answer: a
Explanation: The sleeve bearing having a stator outer diameter of 150 mm has losses at
different running speed. The 1000 rpm machine gives loss of 3.7 W.
See lessWhat is the range of the frequency constant?
Answer: a Explanation: The minimum value of the frequency constant used in the output equation of P.H Tricky is 0.86. The maximum value of the frequency constant used in the output equation of P.H Tricky is 1.0.
Answer: a
Explanation: The minimum value of the frequency constant used in the output equation
of P.H Tricky is 0.86. The maximum value of the frequency constant used in the output
equation of P.H Tricky is 1.0.
See lessWhat is the range of the motor type constant?
Answer: c Explanation: The minimum value of the motor type constants is 1.1. The maximum value of the motor type constants is 1.42.
Answer: c
Explanation: The minimum value of the motor type constants is 1.1. The maximum value
of the motor type constants is 1.42.
See lessWhat is the formula of the most economical relation between D and L?
Answer: d Explanation: The length and the diameter are the 2 main dimensions of the single phase induction motor. The most economical relation between length and diameter is length = 0.63 * diameter.
Answer: d
Explanation: The length and the diameter are the 2 main dimensions of the single phase
induction motor. The most economical relation between length and diameter is length =
0.63 * diameter.
See lessThe loss for the sleeve bearing having stator outer diameter 150 mm and 1000
Answer: a Explanation: The sleeve bearing having a stator outer diameter of 150 mm has losses at different running speed. The 1000 rpm machine gives loss of 3.7 W.
Answer: a
Explanation: The sleeve bearing having a stator outer diameter of 150 mm has losses at
different running speed. The 1000 rpm machine gives loss of 3.7 W.
See lessThe high values actually apply for the small motors below 150 W.
Answer: b Explanation: The friction and windage loss and a speed of 1500 rpm, it is usually 4-8% of the watt output. The high values apply to small motors below 180 W.
Answer: b
Explanation: The friction and windage loss and a speed of 1500 rpm, it is usually 4-8%
of the watt output. The high values apply to small motors below 180 W.
See lessWhat factor is the core length made equal to in theoretical conditions?
Answer: c Explanation: The core length is made equal to the pole length in theoretical conditions. But in practical the exact dimensions are governed by manufacturing conditions.
Answer: c
Explanation: The core length is made equal to the pole length in theoretical conditions.
But in practical the exact dimensions are governed by manufacturing conditions.
See lessWhat is the output equation of a single phase induction motor developed by P.H Tricky?
Answer: b Explanation: The output coefficient, horse power, frequency constant, motor type constant along with the speed is calculated. On substitution we get the diameter2 * length value.
Answer: b
Explanation: The output coefficient, horse power, frequency constant, motor type
constant along with the speed is calculated. On substitution we get the diameter2 * length
value.
See less