Related Questions

Which one of the following is not necessarily the advantage of D.C. motors over A.C. motors?
A Low cost
B Wide speed range
C Stability
D High starting torque
When the axis of load lies in the plane of rivet group, then the most heavily loaded rivet will be the one which (where, Fa is the load shared by each rivet due to axial load and Fm is the shearing load due to moment in any rivet.)
A Is at the maximum distance from CG of the rivet group
B Is at the minimum distance from CG of the rivet group
C Gives the maximum angle between the two forces Fa and Fm
D Gives the minimum angle between the two forces Fa and Fm
In testing a pile by load test, pile platform is loaded with one and half times the design load and a maximum settlement is noted. The load is gradually removed and the consequent rebound is measured. For a safe pile, the net settlement (i.e. total settlement minus rebound) per tonne of test load should not exceed
A 10 mm
B 15 mm
C 20 mm
D 25 mm
Which of the following motors is used in a situation where load increases with speed ?
A Induction motor
B Three-phase series motor
C Schrage motor
D Hysteresis motor
In D.C. shunt motors as load is reduced
A The speed will increase abruptly
B The speed will increase in proportion to reduction in load
C The speed will remain almost/constant
D The speed will reduce
The mechanical displacement of the rotor with respect to the stator, in polyphase multipolar synchronous motors running at full load, is of the order of
A zero degree
B two degrees
C five degrees
D ten degrees
The standard full-load power factor ratings for synchronous motors are
A zero or 0.8 leading
B unity or 0.8 lagging
C unity or 0.8 leading
D unity or zero
Farid can complete a job in 12 hours, and Jibon can complete the same job in 8 hours. Farid starts the job at 9 a.m., and stops working at 3 p.m. If Jibon starts working at 4 p.m. to complete the remaining job, at what time is the job finished?
A 6 p.m.
B 8 p.m.
C 9 p.m.
D 10 p.m.
Farid can complete a job in 12 hours, and Jibon can complete the same job in 8 hours. Farid starts the job at 9 am and stops working at 3 pm. If Jibon starts working at 4 pm to complete the remaining job, at what time is the job finished?
A 6 p.m.
B 7 p.m.
C 8 p.m.
D 10 p.m.
P starts jogging from point X to point Y. 30 minutes later his friend R who jogs 1 km/hour slower than twice P's rate starts from the same point and follows the same path. If R overtakes P in 2 hours, how many kilometres will R have covered?
A 2.2 km
B 3.33 km
C 4 km
D 6 km

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