What is type of nut and bolts are used in IPBD?

What is type of nut and bolts are used in IPBD?  
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1 Answer

Answer :

Non-magnetic stainless steel nut and bolts are used in IPBD to restrict magnetic effect at joints.  
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Related questions

If there is no place to accommodate the nut, then one would choose the a) Through Bolts b) Tap Bolts c) Studs d) None of the mentioned

Description : If there is no place to accommodate the nut, then one would choose the a) Through Bolts b) Tap Bolts c) Studs d) None of the mentioned

Last Answer : b) Tap Bolts

Which of the following is not a function of washer? a) Distributes load over a large area of clamped parts b) Provides bearing surface over large clearance bolts c) Prevents marring of the bolt head and nut surface d) Helps in locking of the fastener

Description : Which of the following is not a function of washer? a) Distributes load over a large area of clamped parts b) Provides bearing surface over large clearance bolts c) Prevents marring of the bolt head and nut surface d) Helps in locking of the fastener

Last Answer : d) Helps in locking of the fastener

Setscrews are (A) Similar to tap bolts except that a greater variety of shapes of heads are available (B) Slotted for screw driver and generally used with a nut (C) Used to prevent relative motion between parts (D) Similar to studs

Description : Setscrews are (A) Similar to tap bolts except that a greater variety of shapes of heads are available (B) Slotted for screw driver and generally used with a nut (C) Used to prevent relative motion between parts (D) Similar to studs

Last Answer : (C) Used to prevent relative motion between parts

What are the tests to be carried during PM checks of IPBD?

Description : What are the tests to be carried during PM checks of IPBD?  

Last Answer : a) Physical inspection of bus for any spark or overheating or discoloration. b) Physical inspection of copper braided flexibles for discoloration. c) Physical inspection of inspection window gaskets, seal off ... Tan-delta test of IPBD m) IR value measurement n) Cleanliness checks entire IPBD. 

What are the torque settings used in IPBD connection?

Description : What are the torque settings used in IPBD connection?

Last Answer : M12 (Nut bolt) 4506 100 kg-cm or 55 NM M16 (Nut bolt) 9006 250 kg-cm or 80 NM M20 (Nut bolt) 18006300 kg-cm or 100 NM 

What are the isolations required for working on IPBD/ Generator?

Description : What are the isolations required for working on IPBD/ Generator?

Last Answer : a. Generator field breaker open and tagged. b. GT breaker open and earth switch closed.  c. Barring gear motor stopped and tagged. d. Generator PT's isolated and tagged. e. CB 472 and CB 474 open ... 's are isolated and tagged. f. Before doing any work on brush gear 64F1 relay to be taken out. 

What is the protection for IPBD?

Description : What is the protection for IPBD? 

Last Answer : Generator – GT overall differential protection.  

What is use of hot air blower in IPBD?

Description : What is use of hot air blower in IPBD?

Last Answer : To remove moisture and to prevent moisture condensation inside the duct at commissioning time or in long shutdown periods. 

Why seal-off bushings are used in IPBD?

Description : Why seal-off bushings are used in IPBD?  

Last Answer : To prevent interchange of air at different temperature and leakage of hydrogen or infiltration of dust into the bus duct. 

Why aluminium bus bars are silver-plated in IPBD?

Description : Why aluminium bus bars are silver-plated in IPBD?

Last Answer : Aluminium bus bars are silver-plated at flexible connection to prevent the galvanic corrosion ant also for low contact resistance. 

Why neoprene rubber bellows are used in IPBD?

Description : Why neoprene rubber bellows are used in IPBD?

Last Answer : Neoprene rubber bellows are used near the terminals of the equipment and also at building wall from indoor to outdoor area to allow thermal expansion and to minimise vibrations. 

What are the salient features of IPBD?

Description : What are the salient features of IPBD?  

Last Answer : a. This for a vital link between generator, GT, UAT, SPPT, SET and neutral grounding transformer. b. The continuous enclosure operating at ground potential limits the leakage flux outside the enclosure ... maintenance is nil. j. Separate parts erected IPBD. Hence changing parts makes it easy. 

Why flexible expansion joints are used in IPBD?

Description : Why flexible expansion joints are used in IPBD?

Last Answer : To cater thermal expansion and contraction due to heating and to eliminate mechanical vibrations to the equipment. 

Why neoprene rubber bellows in generator IPBD?

Description : Why neoprene rubber bellows in generator IPBD?

Last Answer : Prevent vibrations transmitted from generator to IPBD.  

If air gap readings for an electical generating machine have changed significantly from the last reading, you should check _________. A. the bearings B. insulation readings and machine cleanliness C. the prime mover thrust bearing D. the field coil bolts for the proper torque values

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Last Answer : Answer: A

Air gap readings should be taken periodicly on electrical generation equipment to __________. A. determine the amount of varnish that can be applied to correct insulation problems B. determine the condition of the bearings C. provide for the correct proper tightening of the field coil bolts and correct lateral adjustment of the field coils D. increase machine efficiency

Description : Air gap readings should be taken periodicly on electrical generation equipment to __________. A. determine the amount of varnish that can be applied to correct insulation problems B. determine the ... field coil bolts and correct lateral adjustment of the field coils D. increase machine efficiency

Last Answer : Answer: B

Two contributors of electronic console failures are heat and vibration. To combat some of their effects, preventive maintenance procedures should include ______________. A. systematic rotation of circuit cards with those from spares to allow component cooling B. periodic changing or cleaning of console ventilation and control room air conditioning filters C. weekly tightening of console foundation bolts and changing of the air in the control room D. all of the above

Description : Two contributors of electronic console failures are heat and vibration. To combat some of their effects, preventive maintenance procedures should include ______________. A. systematic rotation of circuit cards with those ... bolts and changing of the air in the control room D. all of the above

Last Answer : Answer: B

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Description : What is the purpose of current carrying bolts in rotor? 

Last Answer : Feeding DC current from slip ring to rotor winding.  

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A box of hardware contains nuts and bolts. The bolts account for 25 percent of the number of items in the box. What percentage are the bolts of the entire box. -Riddles

Description : A box of hardware contains nuts and bolts. The bolts account for 25 percent of the number of items in the box. What percentage are the bolts of the entire box. -Riddles

Last Answer : 20 percent. For example, there are 10 bolts. Since the number of bolts is 25 percent of the number of items, there must be 40 nuts. The total number of items = 10 bolts + 40 nuts = 50. So, 10/50 = 1/5 = 20%.

A box contains 50 bolts and 150 nuts. On checking the box, it was found that half of the bolts and half of the nuts are rusted. -Maths 9th

Description : A box contains 50 bolts and 150 nuts. On checking the box, it was found that half of the bolts and half of the nuts are rusted. -Maths 9th

Last Answer : Total number of nuts and bolts in the box = 150 + 50 = 200 Number of nuts and bolts rusted = 1 / 2 × 200 = 100 P(a rusted nut or bolt) = 100 / 200 = 1 / 2

A box contains 50 bolts and 150 nuts. On checking the box, it was found that half of the bolts and half of the nuts are rusted. -Maths 9th

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Description : What is Usain Bolt's fan email address?

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Maximum carbon content in any variety of steel can be upto 1.3%. Steel containing 0.4% Carbon is not used for making (A) Nuts (B) Bolts (C) Chisels

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The shear plane in case of bolts should (a) be across threaded portion of shank (b) be parallel to axis of bolt (c) be normal to threaded portion of shank (d) never be across the threaded portion (e) none of the above.

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Which of the following statements are true about eccentrically loaded circular base? a) All bolts are symmetrically spaced with equal angle on either side of vertical b) Bolts are not preloaded c) Bearing is rigid d) Dowel pins are used to relieve stresses

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Last Answer : d) None of the listed