1. A limit system in which hole is constant member and different fit are obtained by varying the size of the shaft is called ?

shaft basis system

hole basis system

interchangeable system

none of the above

Answer: hole basis system

Explanation:


2. _______ is used to prepare a flexible joint between two shaft at desired angle ?

cotter joint

key joint

knuckle joint

none of the above

Answer: knuckle joint

Explanation:


3. Which of the following is not a clearance fit ?

slide fit

running fit

shrink fit

loose running fit

Answer: shrink fit

Explanation:


4. A hole whose lower division is zero is called hole basis, which one of the following letters indicates basic hole ?

E

h

G

H

Answer: H

Explanation:


5. The relation between the two part where one is inserted to the other with a certain degree of tightness or looseness is now as ?

tolerance

allowance

fit

clearance

Answer: fit

Explanation:


6. For basic size of shaft of diameter 20 mm H7 limit are 0 and 21 microns and for hole of same diameter, g6 limit are -7 and -20 microns, find the maximum clearance between hole and shaft. ?

7 micron

20 micron

28 micron

41 micron

Answer: 41 micron

Explanation:


7. Which of the following fits is not according to the BIS system ?

25 H8/g7

25 g7/h8

25 H8-g7

40 H8f6

Answer: 25 g7/h8

Explanation:


8. Which among the following instruments are use to check the components only to ensure that the size are within the prescribed limits in mass production work ?

dial test indicator

try square

vernier caliper

gauge

Answer: gauge

Explanation:


9. In shaft basis system ?

fundamental deviation of the hole is taken as zero

fundamental deviation of the shaft is taken as zero

the size of the shaft is kept constant and size of hole is varied

both a and c

Answer: the size of the shaft is kept constant and size of hole is varied

Explanation:


10. limits of 30 mm hole is ES= +0.025 and EI= +0.002 mm. The maximum and minimum hole sizes will be ?

max. 30.02 mm ; min. 29.998 mm

max. 30.025 mm ; min. 30.002 mm

max. 29.998 mm ; min. 30.002 mm

max. 29.990 mm ; min. 29.975 mm

Answer: max. 30.025 mm ; min. 30.002 mm

Explanation: