What is the value for centrifugal torque for maximum power transmission in belt drives
a) ½ maximum torque
b) 2/3 maximum torque
c) ¾ maximum torque
d) None of the above

1 Answer

Answer :

d) None of the above

Related questions

Description : Lewis formula is used in the design of a) gears b) clutch c) chain drive d) belt drives

Last Answer : a) gears

Description : ECE Board Exam March 1996 SSB transmission requires only ______ of the bandwidth for a DSBFC transmission. A. ¼ B. 2/3 C. ½ D. ¾

Last Answer : C. ½

Description : V-belt drive transmission system is used when it is designed to achieve a) High speed ratio b) Space requirements are limited c) Both (a) and (b) d) None of the above

Last Answer : c) Both (a) and (b)

Description : Rated speed of an engine is the speed at which an engine devlopes (A) Maximum crankshaft torque (B) Maximum brake horse power output (C) Maximum thermal efficiency (D) Maximum drawback pull

Last Answer : (B) Maximum brake horse power output

Description : The sewers A. Must be of adequate size to avoid over flow B. Must flow under gravity ½ to ¾ full C. Must be laid at least 2 to 3 m deep to collect /water from the basements D. All the above

Last Answer : ANS: D

Description : What is the usual electrical length of a driven element in an HF beam antenna? A. ¼ wavelength B. ¾ wavelength C. ½ wavelength D. 1 wavelength

Last Answer : C. ½ wavelength

Description : The antenna effective height is ____ to ____ of the actual height. A. ½ to 2/3 B. ½ to ¾ C. ¼ to 2/3 D. ¼ to ¾

Last Answer : A. ½ to 2/3

Description : Slip of belt is responsible for A. Reduction is speed B. Reduction in power C. Reduction in belt life D. All of the above

Last Answer : D. All of the above

Description : Engine power output is a function of A. Crank shaft torque B. Speed C. Both (A) and (B) D. None of the above

Last Answer : Engine power output is a function of A. Crank shaft torque B. Speed C. Both (A) and (B) D. None of the above

Description : The purpose of registration in a mower is (A) to get uniform length of cut of grass (B)to run the mower at minimum power (C)to run the mower at uniform torque (D)to reduce the occurrence of overload

Last Answer : (B)to run the mower at minimum power

Description : Chain drives are stable for a) Constant speed ratio between parallel shafts b) Distance between centre to centre is moderate c) Dirty and dusty environment d) All of the above

Last Answer : d) All of the above

Description : V -belt are most suitable for a. less space requirements b. use with adjustable pulley foe speed change c. both (a) and (b) d. none of the above

Last Answer : c. both (a) and (b)

Description : Length of open belt is given by formula a. L=[2C+( 2) (DI+D2)] + [ /4C] b. L=[2C+( 2) (DI+D2)] + [ /4C] c. L=[2C+( 2) (DI+D2)] + [ ] d. L=[2C+( 2) (DI D2)] + [ ]

Last Answer : a. L=[2C+( 2) (DI+D2)] + [ /4C]

Description : Function of idler pully are a. to increase the angle of contact of belt on pully b. maintain belt tension as belt stretches c. canter to centre distance remain same d. all the above

Last Answer : d. all the above

Description : Belt Tension can be adjusted by a. idler pulley b. slide rails c. tilting plate drive d. all the above

Last Answer : d. all the above

Description : Desired tension in an open belt drive system can be maintained (without changing center to center distance between two pulley)by using A)ldler pulley. B)slide rail C) Tilting angle. D)none of the above

Last Answer : A)ldler pulley

Description : When V-belt drive is used a safety device, its performance is affected by a) Variation in belt tention b) Increase in coefficient of friction as belt slippage increase c) Both (a) and (b) d) None of the above

Last Answer : c) Both (a) and (b)

Description : When frequency of occurrence of overload is less and magnitude of overload is also less than safety device used is a) Safety jump clutch b) Shear device c) Frictional device d) V-belt drive

Last Answer : a) Safety jump clutch

Description : When frequency of occurrence of overload is less but the mangnitude of overload is large than safety device used is: a) Safety jump clutch b) Shear device c) Frictional device d) V-belt drive

Last Answer : b) Shear device

Description : Smaller tension ratio result in.... (a) Unnecessary high tension in belt (b) Reduction in belt life (c) Both (c) & (b) (d) Excessive belt slippage

Last Answer : (c) Both (c) & (b)

Description : 310- Larger tension ratio result in... (a) Unnecessary high tension in belt (b) Reduction in belt life (c) Excessive belt slippage (d) Increase belt life

Last Answer : (c) Excessive belt slippage

Description : .308- Life expectancy of V-belt in farm machinery is about.... (a) 200-500 hrs (b) 1000-2000 hrs (c) 2000-5000hrs (d) 5000-10000hrs

Last Answer : (b) 1000-2000 hrs

Description : In comparison to jump clutchs, advantages of the friction safety clutches is/are a) More consistent break away torque b) No damageing peak during slippage c) Protecting a drive from high freuency peak torque (2-3 time normal values) d) All of the above

Last Answer : d) All of the above

Description : iesel engine has less reserve torque then spark ignition because ∙ Torque-speed curve is governed by volumetric efficiency of fuel pump and engine cylinder ∙ Torque is a function of thermal efficiency ∙ Diesel engine has generally low speed engine ∙ None of the above

Last Answer : ∙ Torque is a function of thermal efficiency

Description : Planters differ from a seed drill in respect of- (A) kind of power transmission system (B)kind of metering mechanism (C)kind of furrow opener used (D)all of the above

Last Answer : (B)kind of metering mechanism

Description : In a horizontal plate type planter maximum obtainable value of cell fill is : A.Greater then 100% B.Less than 100% C.200% D.None of the above

Last Answer : A.Greater then 100%

Description : Seed drills differ from the planters in respect of a) metering mechanism b) ground wheel design c) transmission system between ground wheel and roller wheel d) none of the above

Last Answer : a) metering mechanism

Description : Which one is a transmission dynamometer a) Torsion dynamometer b) Froues hydraulic dynamometer c) Belr dynamometer d) Proney brake dynamometer

Last Answer : a) Torsion dynamometer

Description : Gears are generally used in the transmission box are ∙ spur gear only ∙ helical gear only ∙ helical and spur gear gears ∙ bevel gears

Last Answer : ∙ helical gear only

Description : Equivalent torque in combined bending and torsion is given by a. Te = (M^2 + T^2)^1/2 b. Te = ½(M^2 + T^2)^1/2 c. Te = M + T d. Te = 1/2 [M+(M^2 + T^2)^1/2]

Last Answer : a. Te = (M^2 + T^2)^1/2

Description : By which of the following methods motor rating for variable load drives can be determined ? (a) Method of average losses (b) Equivalent current method (c) Equivalent torque method (d) Equivalent power method (e) All of the above.

Last Answer : (e) All of the above.

Description : Main function of cutout relay in electrical circuit is A. To prevent the reversal of current flow from the battery when dynamo speed (engine speed) reduces. B. To restrict the maximum output at ... deliver current to the battery or to the lightening and ignition circuit. D. None of the above

Last Answer : A. To prevent the reversal of current flow from the battery when dynamo speed (engine speed) reduces.

Description : Farming operation which requires maximum energy a.) Sowing b.) Interculture c.) Tillage d.) Harvesting

Last Answer : c.) Tillage

Description : subsoilers are operated at maximum depth of: A.30-40cm B.45-75cm C.75-90cm D.10-20cm

Last Answer : B.45-75cm

Description : For maximum moisture conservation ploughing is done with A. mb plough b. cultivator c. chisel plough d. dice harrow

Last Answer : c. chisel plough

Description : In power transmission equation, P=2ΠNT/60×1000 a. P is in kw and T is maximum torque b. P is in NM/sec and T is maximum torque c. P is in NM/sec and T is mean torque d. P is in kw and T is mean torque

Last Answer : d. P is in kw and T is mean torque

Description : What Are The Rules For Belt Drives?

Last Answer :  The distance between two pulleys should not be less than three times the diameter of the larger pulley.  The slack side should be uppermost which may increase the arc of contact.  The ratio of ... should not exceed 6:1.  If necessary ,a jockey pulley should be used to minimize the slip.

Description : The method which depreciates the tractor or machine to zero at the end of its expected life is known as: A. Estimated value B. Sum-of-the digits C. Declining balance D. Straight line

Last Answer : D. Straight line

Description : High speed diesel A) is used on high speed engine B) has lower fule value then l.s.d per litre. C)both (a) & (b) D)none of the above

Last Answer : C)both (a) & (b)

Description : Optimum speed for grains like gram,pea,etc.,thresher using power is a) 300-400rpm b) 400-600rpm c) 600-800rpm d) 1100-1200rpm

Last Answer : a) 300-400rpm

Description : Optimum operating cylinder speed for wheat threshing using power operated thresher is a) 300-400rpm b) 400-600rpm c) 600-800rpm d) 1100-1200rpm

Last Answer : d) 1100-1200rpm

Description : Optimum operating cylinder speed for the power operated maize sheller is a) 200-400rpm b) 400-600rpm c) 600-800rpm d) 1000-1200rpm

Last Answer : c) 600-800rpm

Description : Superchargers are driven by A. Electric current from the battery B. Exhaust gases from engine C. Direct connection with the engine power D. None of the above

Last Answer : C. Direct connection with the engine power

Description : Turbo chargers are driven by A. Direct connection with engine power B. Exhaust gases from engine C. Electric current from the battery D. None of the above

Last Answer : B. Exhaust gases from engine

Description : Turbo chargers or super chargers increases engine power by A. 10-20% C. 50-60% B. 20-30% D. 90-100%

Last Answer : A. 10-20%

Description : Weight per unit of drawbar power is generally ranges between a)50-120kg/kw b)120-150kg/kw c)150-250kg/kw d)250-300kg/kw

Last Answer : a)50-120kg/kw

Description : Suggested or recommended difference in mass to power ratio between ballasted and unballasted tractor is of the order a)10kg/PTO KW b)6kg/PTO kw c)20kg/PTO kw d)30kg/PTO kw

Last Answer : b)6kg/PTO kw

Description : Total mechanical losses ( frictional losses , pumping loss in intake and exhaust and power accessories) will amount to a.10-20 % ihp b.2-10 % ihp c.20-30 % ihp d.30 -50 % ihp

Last Answer : a.10-20 % ihp

Description : Worm gear are used for transmitting power between two Shaft Inclined at e. At right angle to each other and axes can intersect f. At right angle to each other but axis cannot intersect each other g. At right angle to each other and in different planes h. None of the above

Last Answer : f. At right angle to each other but axis cannot intersect each other

Description : Spiral gear are used for transmitting power between two shaft Inclined at a. Right angle to each other and axes can intersect b. Right angle to each other and axes cannot intersect c. At angle slightly lesser or greater than 90 of axles can meet d. None of the above

Last Answer : c. At angle slightly lesser or greater than 90 of axles can meet