Related Questions

The school principal has received complaints from parents about bullying in the school yard during recess. He wants to investigate and end this situation as soon as possible, so he has asked the recess aides to watch closely. Which situation should the recess aides report to the principal?
A A girl is sitting glumly on a bench reading a book and not interacting with her peers.
B Four girls are surrounding another girl and seem to have possession of her backpack.
C Two boys are playing a one-on-one game of basketball and are arguing over the last basket scored.
D Three boys are huddled over a handheld video game, which isn't supposed to be on school grounds.
When the material of key and shaft is same, and the width of key is one-fourth of the diameter of shaft (d), then length of key will be
A 0.8 d
B 1.2 d
C 1.57 d
D 1.8 d
Two shafts A and B are made of the same material. The diameter of shaft A is twice as that of shaft B. The power transmitted by the shaft A will be __________ of shaft B.
A Twice
B Four times
C Eight times
D Sixteen times
A taper key which fits half in the key way of the hub and half in the key way of shaft, is known as
A sunk key
B flat saddle key
C hollow saddle key
D tangent key
The product of the tangential force acting on the shaft and its distance from the axis of the shaft (i.e. radius of shaft) is known as
A Bending moment
B Twisting moment
C Torsional rigidity
D Flexural rigidity
The natural frequency of free torsional vibrations of a shaft is equal to (where q = Torsional stiffness of the shaft and $$I$$ = Mass moment of inertia of the disc attached at the end of a shaft)
A $$2\pi \sqrt {\frac{{\text{q}}}{I}} $$
B $$2\pi \sqrt {{\text{q}}I} $$
C $$\frac{1}{{2\pi }}\sqrt {\frac{{\text{q}}}{I}} $$
D $$\frac{1}{{2\pi }}$$
The radius of a friction circle for a shaft rotating inside a bearing is (where r = Radius of shaft and $$\tan \varphi $$  = Coefficient of friction between the shaft and bearing)
A $${\text{r}}\sin \varphi $$
B $${\text{r}}\cos \varphi $$
C $${\text{r}}\tan \varphi $$
D $$\frac{{\text{r}}}{2}\cos \varphi $$
In a milling operation, two side milling cutters are mounted with a desired distance between them so that both sides of a workpiece can be milled simultaneously. This set up is called
A Gang milling
B Straddle milling
C String milling
D Side milling
A tapered key which fits in a key way in the hub and the bottom of which is shaped to fit the curved surface of the shaft, is known as,
A Hollow saddle key
B Hollow key
C Soft key
D None of these
A tapered key which fits in a key way in the hub and is flat on the shaft, is known as
A Feather key
B Gib-head key
C Wood ruff key
D Flat saddle key

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