51
The efficiency of a riveted joint is equal to
A)
$$\frac{{{{\text{P}}_{\text{t}}}}}{{\text{P}}}$$
B)
$$\frac{{{{\text{P}}_{\text{s}}}}}{{\text{P}}}$$
C)
$$\frac{{{{\text{P}}_{\text{c}}}}}{{\text{P}}}$$
D)
Least of $${{\text{P}}_{\text{t}}},\,{{\text{P}}_{\text{s}}}$$ and $$\frac{{{{\text{P}}_{\text{c}}}}}{{\text{P}}}$$
Answer & Solution
Answer: Option
D
52
The strength of a riveted joint is equal to
A)
Tearing strength of plate (Pt )
B)
Shearing strength of rivet (Ps )
C)
Crushing strength of rivet (Pc )
D)
Least value of Pt , Ps and Pc
Answer & Solution
Answer: Option
D
53
In an oil lubricated journal bearing, the coefficient of friction between the journal and the bearing
A)
Remains constant at all speeds
B)
Is minimum at zero speed and increases monotonically with increase in speed
C)
Is maximum at zero speed and decreases monotonically with increase in speed
D)
Becomes minimum at an optimum speed and then increases with further increase in speed
Answer & Solution
Answer: Option
D
54
When the connected members are very yielding (soft gasket) as compared to the bolt, then the resultant load on the bolt will be equal to the
A)
Initial tension
B)
External load applied
C)
Sum of the initial tension and external load applied
D)
Initial tension or external load, whichever is greater
Answer & Solution
Answer: Option
C
55
When the connected members are very yielding (soft gasket) as compared to the bolt, then the resultant load on the bolt will be equal to the
A)
Initial tension
B)
External load applied
C)
Sum of the initial tension and external load applied
D)
Initial tension or external load, whichever is greater
Answer & Solution
Answer: Option
C
56
When the bolt is very yielding as compared to the connected members, then the resultant load on the bolt will be equal to the
A)
Initial tension
B)
External load applied
C)
Sum of the initial tension and external load applied
D)
Initial tension or external load, whichever is greater
Answer & Solution
Answer: Option
D
57
In a belt drive, if the pulley diameter is doubled keeping the tension and belt width constant, then it will be necessary to
A)
Increase the key length
B)
Increase the key depth
C)
Increase the key width
D)
Decrease the key length
Answer & Solution
Answer: Option
A
58
An imaginary circle which by pure rolling action gives the same motion as the actual gear, is called
A)
Addendum circle
B)
Dedendum circle
C)
Pitch circle
D)
Clearance circle
Answer & Solution
Answer: Option
C
59
According to I.B.R., the efficiency of a double riveted butt joint with double cover straps of equal width should be
A)
45 to 60%
B)
63 to 70%
C)
70 to 83%
D)
80 to 90%
Answer & Solution
Answer: Option
C
60
In a marine flange coupling, the thickness of flange is taken as
A)
$$\frac{{\text{d}}}{2}$$
B)
$$\frac{{\text{d}}}{3}$$
C)
$$\frac{{3{\text{d}}}}{4}$$
D)
$$\frac{{\text{d}}}{4}$$
Answer & Solution
Answer: Option
B
