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This set of Theory of Mechanics Multiple Choice Questions & Answers (MCQs) focuses on Theory Of Mechanics Set 6
Q1 | Which of the following is an absorption type dynamometer?
- prony brake dynamometer
- rope brake dynamometer
- epicyclic-train dynamometer
- both a and b
Q2 | An example of an absorption type dynamometer is ___
- prony brake dynamometer
- epicyclic train dynamometer
- torsion dynamometer
- belt transmission dynamometer
Q3 | An example of a transmission dynamometer is______
- prony brake dynamometer
- rope brake dynamometer
- froude dynamometer
- torsion dynamometer
Q4 | Which of the following is classified as absorption dynamometer?
- prony brake dynamometer
- rope brake dynamometer
- froude\s hydraulic dynamometer
- all of the above
Q5 | Which of the following is classified as transmission dynamometer?
- torsion dynamometer
- froude\s hydraulic dynamometer
- belt dynamometer or tathan dynamometer
- prony brake dynamometer
Q6 | In case of dynamometer function of counter weight is to _____
- balance the brake when unloaded
- adjust pressure on pulley to control speed
- prevent rotation of block due to fraction between block and pulley
- to clamp the blocks
Q7 | Cooling water is used in________
- prony brake dynamometer
- epicyclic gear train dynamometer
- torsion dynamometer
- rope brake dynamometer
Q8 | Tathem dynamometer is name given to______
- rope brake dynamometer
- belt transmission dynamometer
- absorption dynamometer
- epicyclic train dynamometer
Q9 | In case of Glibson flash light torsion dynamometer angle of twist can be measured up to _______
- 1/20th of degree
- 1/10th of degree
- 1/70th of degree
- 1/100th of degree
Q10 | The following data refer to a laboratory experiment with rope brake____.Diameter of the flywheel=1m Diameter of the rope = 10mm , Dead weight on the brake = 50kg , Speed of the engine = 200rpm , Spring balance reading = 120N . Find brake power of the engine.
- 3.91 kw
- 2.90 kw
- 4.90 kw
- 3.80 kw
Q11 | A torsion dynamometer is fitted on turbine shaft to measure the angle of twist. The shaft twist 1.60 for a length of 8 meters at 600 rpm. The diameter of shaft is 250 mm. Find the power transmitted by the turbine. Take G= 80 GPa
- 68.22 kw
- 67.22 kw
- 65.22 kw
- 66.32 kw
Q12 | The uniform Pressure conditions are used_____.
- for safe design of clutches
- for maximum power to be transmitted
- for safe design bearing
- for the frictional torque
Q13 | For safe design of brakes, we assume____.
- uniform pressure conditions
- uniform wear condition
- neither uniform pressure nor uniform wear
- all of the above
Q14 | According to uniform wear theory____. Where,w=Angular velocity of shaft, r=radius of shaft, W=Axial lead on shaft
- pw=constant
- pr=constant
- pt=constant
- pw=constant
Q15 | The uniform wear condition are used__________
- for maximum power to be transmitted
- for safe design of clutches
- for safe design of bearing
- for overcoming the frictional torque
Q16 | According to uniform wear theory____. Where, w=Angular velocity of shaft, r=radius of shaft, W=Axial lead on shaft
- pw=constant
- pr=constant
- pt=constant
- pw=constant
Q17 | The ratio of friction torque for uniform pressure to uniform were for the same dimensions and load is _____________.
- >1
- 1
- <1
- 0.5
Q18 | Torque required to overcome the friction between shaft and bearing surface in case of multiple flat collar bearing is ___________.
- independent of no\s of collars
- dependent of radius of collars
- dependent of no\s of collars
- none of the above
Q19 | According to uniform were theory frictional torque transmitted by conical pivot bearing is ________.
- 2/3 (μ w r cosec α)
- 1/2 (μ w r cosec α)
- 1/2 (μ w r cos α)
- μ w r cosec α
Q20 | Frictional torque as per uniform were theory is __________.
- μp (ro+/ri)
- ½ μp (ro+/ri)
- ½ μp [(ro³+/ri³)/(ro²+/ri²)]
- μp(ro³-/ri³)/2 (ro²-/ri²)