Set screws are

Of 30 integers, 12 are in set A , 22 are in set A , 22 are in set B , and 7 are in both set A and B. How many of the integers in NITTHER set A nor set B?

A

4

B

1

C

3

Screws used for power transmission should have

A

low efficiency

B

high efficiency

C

very fine threads

D

strong teeth

Machine screws are

A

Similar to small size tap bolts except that a greater variety of shapes of heads are available

B

Slotted for a screw driver and generally used with a nut

C

Used to prevent relative motion between two parts

D

Similar to stud

Cap screws are

A

Similar to small size tap bolts except that a greater variety of shapes of heads are available

B

Slotted for a screw driver and generally used with a nut

C

Used to prevent relative motion between parts

D

Provided with detachable caps

Which of the following statement is correct regarding power screws?

A

The efficiency of a self locking screw can not be more than 50%

B

The efficiency of Acme (trapezoidal) thread is less than that of a square thread

C

If the friction angle is less than the helix angle of the screw, then the efficiency will be more than 50%

D

Both (A) and (B)

Ball bearing type screws are found in following application

A

Screw jack

B

Aeroplane engines

C

Crane

D

Steering mechanism

Screws are specified by their __________ diameters.

A

Minor

B

Major

C

Pitch

D

None of these

The average of a set of 12 numbers, which includes 35, is N. If 35 is removed from the set and 38 is added to the set, then what is the average of the new set of numbers in terms of N ?

A

N + 1/3

B

12 N +3

C

N +1/4

D

N +3

The average of a set of 12 numbers, which includes 34, is A. If 34 is removed from the set and 38 is included to the set , what is the average of the new set of numbers in terms of A ?

A

A+4

B

A+1/3

C

12 A+4

D

(A+38)/12

P is a set of 5 consecutive integers whose average is 4. Q is a set of 7 consecutive integer whose average is 7. How many numbers of set Q are also members of set P?

A

1

B

2

C

3

Set screws are

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