Machine Design (2171909) MCQs

MCQs of Design of Gear Box for Machine Tools

Showing 11 to 19 out of 19 Questions
1 2
11.

If the structure formula of a gearbox design is z = 2(1) 2(2), then the approximate number of gears required will be _______.

(a)

4
(b)

6
(c)

8
(d)

10
Answer:

Option (c)

12.

If the structure formula of a gearbox design is z = 2(1) 3(2) 2(6), then the approximate number of gears required will be _______.

(a)

6
(b)

12
(c)

14
(d)

16
Answer:

Option (c)

13.

If the number of stages in a gearbox is 'n', how many vertical lines will be drawn at a convenient distance in a speed diagram?

(a)

n-1
(b)

n
(c)

n+1
(d)

n+2
Answer:

Option (d)

14.

Which of the following statements is not true for a gearbox design?

(a)

The structure diagram does not give the spindle speeds
(b)

The speed diagram gives the range ratio of spindle speeds
(c)

The speed diagram does not give the electric motor speed
(d)

The speed diagram gives all spindle speeds
Answer:

Option (c)

15.

The sum of the number of teeth on gear pairs for parallel shafts of the gearbox should be  ______.

(a)

same
(b)

varying
(c)

non-integer
(d)

odd number
Answer:

Option (a)

16.

If b = face width, then the spacing between two adjacent gears in a gearbox should be ______.

(a)

< 2b
(b)

> 2b
(c)

< 4b
(d)

> 4b
Answer:

Option (b)

17.

A machine tool has a minimum speed of 100 r.p.m. How many speed steps are required by it to achieve a speed of 200 rpm? (Geometric progression ratio = 1.06)

(a)

11
(b)

12
(c)

13
(d)

14
Answer:

Option (b)

18.

What is the geometric progression ratio if the maximum and minimum spindle speeds are 500 r.p.m and 31.5 r.p.m respectively? (Number of speed steps = 9)

(a)

1.11
(b)

1.21
(c)

1.31
(d)

1.41
Answer:

Option (d)

19.

In which of the gearbox, all gear pairs are not always in contact?

(a)

Constant-mesh gearbox
(b)

Sliding mesh gearbox
(c)

Synchromesh gearbox
(d)

Epicyclical gearbox
Answer:

Option (b)

Showing 11 to 19 out of 19 Questions
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