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Hydraulic Machines Mcqs

Q:

In a hydraulic crane __________ is the component mainly responsible for lifting.

A) Boom B) Counter-weights
C) Jib D) Rotex Gear
 
Answer & Explanation Answer: A) Boom

Explanation: Boom is the main component for lifting in hydraulic cranes. It is mechanically robust and strong. It provides the adequate support needed for lifting objects. It is designed so as to withstand heavy weights.

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93
Q:

In a hydraulic system the development of pressure is by variable displacement pump and _____

A) stationary pump B) fixed pump
C) gear pump D) motor pump
 
Answer & Explanation Answer: C) gear pump

Explanation: The two pumps in a hydraulic crane are variable displacement pump and gear pump. The most commonly used pumps in hydraulic cranes are two gear pumps. They provide the required pressure to pressurize the fluid.

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82
Q:

Due to the arrangement of hydraulic jigger, the ________ rotates

A) Fixed cylinder B) Sliding contact
C) Fluid D) Pulley
 
Answer & Explanation Answer: D) Pulley

Explanation: Pulley rotates because of the arrangement of the jiggers. The fixed cylinder, as the name suggests, is stationary. The sliding contact is only capable of translatory motion, and not rotatory. The fluid doesn’t rotate. Hence, the answer is narrowed down to pulley.

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155
Q:

Idle period of lift is defined as the difference of the total time taken for one operation and the _____ of the lift.

A) Working period B) Stationary period
C) Active period D) Passive period
 
Answer & Explanation Answer: A) Working period

Explanation: Idle period of a lift is defined as the difference of the total time taken for a single operation and the working period of the lift. For a constant time, the greater the working period, the lesser is the idle period. The ratio of the height of the lift to the velocity of the lift is the working period.

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103
Q:

Working period is defined as the ratio of the height of lift to the ___________

A) acceleration of the lift B) pressure of the lift
C) velocity of the lift D) displacement of the lift.
 
Answer & Explanation Answer: C) velocity of the lift

Explanation: The reciprocal of the ratio of the velocity of the lift to the height of the lift is defined as the working period. This implies that the ratio of the height of the lift to the velocity of the lift is the working period. The greater the working period, the lesser is the velocity of the lift and vice versa.

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141
Q:

_________ is attached to the wall of the floor, where the sliding ram moves upwards or downwards depending on how the pressure is applied.

A) Cage B) Fixed cylinder
C) Pulleys D) shaft
 
Answer & Explanation Answer: B) Fixed cylinder

Explanation: The fixed cylinder is attached to the wall of the floor. It is connected to the sliding ram. This cylinder is stationary, whereas the sliding ram can reciprocate depending on how the pressure is applied.

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113
Q:

The two types of pulleys in a hydraulic lift are ______ and ______

A) fixed, fixed B) movable, fixed
C) movable, movable D) semi-movable, movable
 
Answer & Explanation Answer: B) movable, fixed

Explanation: The two types of pulleys available are fixed pulley and movable pulley. The one end of both the pulleys is connected to the sliding ram. The other end of the pulleys is connected to the fixed cylinder.

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149
Q:

______ is attached to the fixed cylindrical chamber which moves in the upward or downward direction.

A) Jiggers B) Sliding Ram
C) Crown D) Pulley
 
Answer & Explanation Answer: B) Sliding Ram

Explanation: Sliding ram Is attached to the fixed cylinder. It enables the cylinder to move in the upward or downward direction. It also has a cage attached to it for mechanical robustness.

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