Theory of Machines Test Questions - Set 5

1)   In spiral gears if normal circular pitch is 13 mm. What is the normal module?

a. 40.84 mm
b. 2.06 mm
c. 4.13 mm
d. None of the above
Answer  Explanation 

ANSWER: 4.13 mm

Explanation:
No explanation is available for this question!


2)   For a simple gear train, velocity ratio is the ratio of

a. Speed of driving shaft and speed of driven shaft
b. Speed of driven shaft and speed of driving shaft
c. Speed of driven shaft and (speed of driving shaft + speed of idler gears)
d. Speed of driving shaft and (speed of driven shaft + speed of idler gears)
Answer  Explanation 

ANSWER: Speed of driven shaft and speed of driving shaft

Explanation:
No explanation is available for this question!


3)   Which of the following statements is/are true for a simple gear train?

a. If number of idle gears is even, driving and driven wheels rotate in opposite direction
b. If number of idle gears is odd, driving and driven wheels rotate in opposite direction
c. If number of idle gears is even, driving and driven wheels rotate in same direction
d. None of the above
Answer  Explanation 

ANSWER: If number of idle gears is even, driving and driven wheels rotate in opposite direction

Explanation:
No explanation is available for this question!


4)   Calculate the speed of driven shaft in compound gear train, if the drivers have 40, 70, 100, and 150 teeth and followers have 15, 44, 60, 100 teeth. Speed of driving shaft is 150 rpm

a. 256 rpm
b. 1650 rpm
c. 1590.90 rpm
d. 1414 .28 rpm
Answer  Explanation 

ANSWER: 1590.90 rpm

Explanation:
No explanation is available for this question!


5)   Calculate speed of driving shaft in compound gear train, if the drivers have 50, 60, 80 and 100 teeth and followers have 18, 40, 60 and 80 teeth. Speed of driven shaft is 150 rpm

a. 21.73 rpm
b. 30.23 rpm
c. 19.77 rpm
d. None of the above
Answer  Explanation 

ANSWER: 21.73 rpm

Explanation:
No explanation is available for this question!


6)   Which type of gear box is used in automobiles?

a. Sliding mesh gear box
b. Differential gear box
c. Synchromesh gear box
d. All of the above
Answer  Explanation 

ANSWER: All of the above

Explanation:
No explanation is available for this question!


7)   Which type of variator is known as Svetozaro variator?

a. Cone variator with swiveling disc
b. Cone variator with spheres supported on shafts
c. Spheroid with spheres supported on shafts
d. Spheroid with swiveling disc
Answer  Explanation 

ANSWER: Spheroid with swiveling disc

Explanation:
No explanation is available for this question!


8)   Which belt is a combination of both toothed and belt transmissions used as an intermediate member in variators with axially displaceable cones?

a. Cogged belt
b. V belt
c. Both a. and b.
d. None of the above
Answer  Explanation 

ANSWER: Cogged belt

Explanation:
No explanation is available for this question!


9)   The chain used in positively infinitely variable drive provides

a. friction type drive
b. positive drive
c. Both a. and b.
d. None of the above
Answer  Explanation 

ANSWER: Both a. and b.

Explanation:
No explanation is available for this question!


10)   Why is a dog clutch used?

a. Used to connect and disconnect machine parts
b. Used to control torque
c. It helps in rotating the shafts at different speeds
d. All of the above
Answer  Explanation 

ANSWER: Used to connect and disconnect machine parts

Explanation:
No explanation is available for this question!


11)   What are variators?

a. They are electrical stepped regulation devices
b. They are mechanical stepped regulation devices
c. They are mechanical stepless regulation devices
d. They are electrical stepless regulation devices
Answer  Explanation 

ANSWER: They are mechanical stepless regulation devices

Explanation:
No explanation is available for this question!


12)   What is the effect of reactive gyroscopic couple when an aeroplane takes a right turn and propeller rotates in anticlockwise direction?

a. The nose and tail of the aeroplane are in horizontal plane
b. The nose of the aeroplane is raised and tail is dipped
c. The nose of the aeroplane is dipped and tail is raised
d. None of the above
Answer  Explanation 

ANSWER: The nose of the aeroplane is dipped and tail is raised

Explanation:
No explanation is available for this question!


13)   What is the effect of reactive gyroscopic couple when aeroplane takes right turn and propeller rotates in clockwise direction?

a. The tail of the aeroplane is dipped and nose is raised
b. The tail of the aeroplane is raised and nose is dipped
c. Reactive gyroscopic couple has no effect when propeller rotates in clockwise direction
d. None of the above
Answer  Explanation 

ANSWER: The tail of the aeroplane is raised and nose is dipped

Explanation:
No explanation is available for this question!


14)   Gyroscopic effect is not observed in which of the following actions performed by the ships?

a. Rolling
b. Pitching
c. Steering
d. All of the above
Answer  Explanation 

ANSWER: Rolling

Explanation:
No explanation is available for this question!


15)   What is meant by pitching of ship?

a. up and down motion of bow and stern along transverse axis
b. up and down motion of bow and stern along longitudinal axis
c. up and down motion of port and starboard along transverse axis
d. none of the above
Answer  Explanation 

ANSWER: up and down motion of bow and stern along transverse axis

Explanation:
No explanation is available for this question!


16)   Find out three precision points using 'Chebyshev Spacing Rule' for the interval 10 to 25

a. 30, 17.5, 23.96
b. 30, 30, 30
c. 11, 17.5, 23.96
d. None of the above
Answer  Explanation 

ANSWER: 11, 17.5, 23.96

Explanation:
No explanation is available for this question!


17)   Which among the following is/are classified under synthesis problem?

a. Path generation
b. Function generation
c. Body guidance
d. All of the above
Answer  Explanation 

ANSWER: All of the above

Explanation:
No explanation is available for this question!


18)   Which among the following is not a type of error found in function generation?

a. Structural error
b. Mechanical error
c. Graphical error
d. None of the above
Answer  Explanation 

ANSWER: None of the above

Explanation:
No explanation is available for this question!


19)   Why are graphical errors caused during function generation?

a. Choice of scale
b. Wrong graphical procedure
c. Both a. and b.
d. None of the above
Answer  Explanation 

ANSWER: Both a. and b.

Explanation:
No explanation is available for this question!


20)   What is meant by order defect?

a. The precision points are not properly configured
b. The links of mechanism do not cover all precision points
c. Both a. and b.
d. None of the above
Answer  Explanation 

ANSWER: The precision points are not properly configured

Explanation:
No explanation is available for this question!